fswiki.us - User contributions [en]

Thread:Talk:Introduction to VD Simulation/Commercial Available Software - OpenLap

2020-06-09T10:12:08Z

Godjka: New thread: Commercial Available Software - OpenLap

If I'm not mistaken OpenLap its a free software. I think we should create a new section titled: Free Software, and add OpenLap to it.

Introduction to VD Simulation

2020-05-30T10:17:47Z

Godjka:

[[Category: VD Simulation]]

==Simulation and Simulation Environment==

Every simulation aims at describing the observed system as accurately as possible in order to be able to model the behavior of the real system. A vehicle or part of a vehicle as well as, if necessary, a part of its environment can be referred to as a system.

 The vehicle models are purely mathematical in nature. Thus running a simulation is equivalent to the running of software. 

==Types of Simulators==
===Laptime===
===Step Sim===
===YMD===
===GGV generator===
===Load Cases===
==Types of Simulation==
===Steady-State===
===Quasi-Steady-State===
===Transient===
==Vehicle Models==

{| class="wikitable"
|-
|Model Type
|Degrees of Freedom
|-
|Single track (bicycle) model, linear
|2
|-
|Single track(bicycle) model, nonlinear
|3-7
|-
|Twin track model
|14-30
|-
|Multibody model
|>20
|-
|Finite Element Model
|>500
|-
|Hybrid model
|>500
|}

===Point Mass===
{{Main|Point Mass Model}}
===Bicycle===
{{Main|Bicycle Model}}
===4 Wheel===
==Commercial Available Software==
Formula Student Teams Available Software

==Vehicle Dynamics Modelling Best Pratices==

A note on implicit versus explicit approach. If you ever worked in a coding team, or if you have inherited code from other people. Most certainly you have experience not knowing what a variable is. This is because we are using an implicit approach. We assume that everyone knows that "m" means mass, or that "wfl" means front left wheel speed. The issue with this approach is ambiguity. For that reason, it is always better to right a long name. Althougth, it takes more time, it is clear to anyone reading which variable of the vehicle you are talking about. Especially since teams cycle only lasts on average 2 years. You will have new comers trying to understand your code. For that reason you should make an extra effort to be sure that your variable are clear.

Should I write fl_w or w_fl?
Preferably write w_fl. The reason is that when you do a search on the programing language if all the variable start with FL, it won't help much. But if you start with their own letter it is easier to search. See image below as an example.

List of acceptable variables:
m | mass
tf | front_track
tr |rear_track
wd | weight_distribution
Ixx
Iyy
Izz
delta | steering_angle| steer_angle
steering_angle_at_wheels _ steer_wheels
Cf | front_cornering_stiffness
Cr | rear_cornering_stiffness
wf | wheel_speed_front
wr | wheel_speed_rear
wfl | wheel_speed_front_left | wheel_speed_fl
wfr | wheel_speed_front_right | wheel_speed_fr
wrl | wheel_speed_rear_left | wheel_speed_rl
wrr | wheel_speed_rear_right | wheel_speed_rr
ax | longitudinal_acceleration | long_acc
ay | lateral_acceleration | lat_acc
az | vertical_acceleartion | vert_acc
vx
vy
vz
x
y
z
pitch
roll
yaw
pitch_rate
roll_rate
yaw_rate

Introduction to VD Simulation

2020-05-28T10:13:01Z

Godjka:

[[Category: VD Simulation]]

=Simulation and Simulation Environment=

Every simulation aims at describing the observed system as accurately as possible in order to be able to model the behavior of the real system. A vehicle or part of a vehicle as well as, if necessary, a part of its environment can be referred to as a system.

 The vehicle models are purely mathematical in nature. Thus running a simulation is equivalent to the running of software. 

Types of Simulators
===Laptime===
===Step Sim===
===YMD===
===GGV generator===
===Load Cases===
==Types of Simulation==
===Steady-State===
===Quasi-Steady-State===
===Transient===
==Vehicle Models==
===
{| class="wikitable"
|-
|Model Type
|Degrees of Freedom
|-
|Single track (bicycle) model, linear
|2
|-
|Single track(bicycle) model, nonlinear
|3-7
|-
|Twin track model
|14-30
|-
|Multibody model
|>20
|-
|Finite Element Model
|>500
|-
|Hybrid model
|>500
|}
===
======
===Point Mass===
{{Main|Point Mass Model}}
===Bicycle===
{{Main|Bicycle Model}}
===4 Wheel===
==Commercial Available Software==
Formula Student Teams Available Software

== References ==
Vehicle Dynamics, Modeling and Simulation. Dieter Schramm, Manfred Hiller, Roberto Bardini

Introduction to VD Simulation

2020-05-28T10:09:36Z

Godjka:

Introduction to VD Simulation

2020-05-28T10:07:20Z

Godjka:

=[[Category: VD Simulation]]

Simulation and Simulation Environment=

Every simulation aims at describing the observed system as accurately as possible in order to be able to model the behavior of the real system. A vehicle or part of a vehicle as well as, if necessary, a part of its environment can be referred to as a system.

 The vehicle models are purely mathematical in nature. Thus running a simulation is equivalent to the running of software. 

Types of Simulators
===Laptime===
===Step Sim===
===YMD===
===GGV generator===
===Load Cases===
==Types of Simulation==
===Steady-State===
===Quasi-Steady-State===
===Transient===
==Vehicle Models==
===
{| class="wikitable"
|-
|Model Type
|Degrees of Freedom
|-
|Single track (bicycle) model, linear
|2
|-
|Single track(bicycle) model, nonlinear
|3-7
|-
|Twin track model
|14-30
|-
|Multibody model
|>20
|-
|Finite Element Model
|>500
|-
|Hybrid model
|>500
|}
===
======
===Point Mass===
{{Main|Point Mass Model}}
===Bicycle===
{{Main|Bicycle Model}}
===4 Wheel===
==Commercial Available Software==
Formula Student Teams Available Software

Thread:Talk:VD Simulation/Types of Simulator/reply (4)

2020-05-28T09:58:42Z

Godjka: Reply to Types of Simulator

I understand. Well, let's add content and then we will have a better idea of how to name things or where to put them.

Thread:Talk:Suspension Reasoning/Can I move this page?/reply

2020-05-25T12:45:19Z

Godjka: Reply to Can I move this page?

If you think that is better, go ahead! Happy that you liked the content!

Thread:Talk:VD Simulation/Types of Simulator/reply (2)

2020-05-24T10:07:11Z

Godjka: Reply to Types of Simulator

Hey!

At least from my personal experience, we use the word Simulator, for when we are referencing to Driver in the Loop (DiL). Example of some simulators that are available are from VI-Grade and ABdynamics.

For me what you have are simulations, types of simulation and models. In your case, I would use the following vocabulary:

Simulations: Steady-State, Quasi, Transient
Models: 4Wheel model, point mass, bicycle model
Simulation type: YMD, LapTime, GGV

I think the above makes more sense because the YMD, Lap Time are types of simulations that you do. I think that using the word simulator can lead people in error.

Maybe if you prefer instead of using the word simulator, maybe it would be better to use: "simulation environment" (I've seen this sentence used before) where it describes the simulation, type of simulation and model to be used.

Let me know what you think!

Thread:Talk:VD Simulation/Change the name from VD Simulation to Introduction to VD Simulation/reply (2)

2020-05-21T09:58:13Z

Godjka: Reply to Change the name from VD Simulation to Introduction to VD Simulation

Thank you!

Thread:Talk:VD Simulation/Types of Simulator

2020-05-20T16:20:48Z

Godjka:

At the moment on the page. There is a section called Types of Simulator that contains the following subtopics:
* Laptime
* Step Sim
* YMD
* GGV generator
* Load Cases

These topics are Simulation types not simulator. I propose that we need to change the topic to Types of Simulation.

Thread:Talk:VD Simulation/Types of Simulator

2020-05-20T16:20:28Z

Godjka: New thread: Types of Simulator

At the moment on the page. There is a section called Types of Simulator that contains the following subtopics:
Laptime
Step Sim
YMD
GGV generator
Load Cases

These topics are Simulation types not simulator. I propose that we need to change the topic to Types of Simulation.

Bicycle Model

2020-05-20T10:16:10Z

Godjka:

=[[Category: VD Simulation]]

Introduction=
=

Equations=
=

State Space Modeling=
=

Linear Analysis=

==Step Response==

==Impulse Response==

==Bode Diagram==
=

Other Important Results=

==Neutral Steer Point==
==Yaw Damping==
=

Python Code=

Bicycle Model

2020-05-20T10:14:19Z

Godjka:

[[Category: VD Simulation]]

Introduction

Equations

State Space Modeling

Linear Analysis
Step Response
Impulse Response
Bode Diagram

Other Important Results
Neutral Steer Point
Yaw Damping

Python Code

Bicycle Model

2020-05-20T09:15:09Z

Godjka: Created page with "Category: VD Simulation"

[[Category: VD Simulation]]

Thread:Talk:VD Simulation/Change the name from VD Simulation to Introduction to VD Simulation

2020-05-20T09:13:50Z

Godjka: New thread: Change the name from VD Simulation to Introduction to VD Simulation

Is it possible to change the name of this? I want to change the name, but seems I can't. Thanks!

Talk:Introduction to VD Simulation

2020-05-20T09:13:50Z

Godjka: Talk page autocreated when first thread was posted

Introduction to VD Simulation

2020-05-20T09:12:25Z

Godjka:

[[Category: VD Simulation]]

Introduction

Types of Simulation

Steady-State

Quasi-Steady-State

Transient

Commercial Available Software

Formula Student Teams Available Software

Point Mass Model

2020-05-20T09:10:39Z

Godjka:

[[Category: VD Simulation]]

Introduction

Code

Simulation results

Category:VD Simulation

2020-05-20T09:08:47Z

Godjka: Created page with "Category: Vehicle Dynamics"

[[Category: Vehicle Dynamics]]

Point Mass Model

2020-05-20T09:03:59Z

Godjka:

[[Category: Vehicle Dynamics]][[Category: VD Simulation]]

Introduction

Code

Simulation results

Point Mass Model

2020-05-20T09:03:21Z

Godjka:

[[Category: VD Simulation]]

Introduction

Code

Simulation results

Point Mass Model

2020-05-20T09:01:50Z

Godjka:

[[Category: Vehicle Dynamics]][[Category: VD Simulation]]

Introduction

Code

Simulation results

Point Mass Model

2020-05-20T08:59:12Z

Godjka:

[[Category: Vehicle Dynamics]][[Category: VD Simulation]]

Point Mass Model

2020-05-20T08:58:34Z

Godjka: Created page with "Category: VD Simulation"

[[Category: VD Simulation]]

Introduction to VD Simulation

2020-05-20T08:58:03Z

Godjka:

[[Category: Vehicle Dynamics]]

Introduction

Types of Simulation

Steady-State

Quasi-Steady-State

Transient

Commercial Available Software

Formula Student Teams Available Software

Introduction to VD Simulation

2020-05-20T08:53:51Z

Godjka: Created page with "Category: Vehicle Dynamics"

[[Category: Vehicle Dynamics]]

Suspension Reasoning

2020-05-19T17:14:32Z

Godjka:

[[Category:Suspension]]

Introduction

In table 1 we presented the importance of having a suspension and a damping system. With that in mind the next step is to select our spring and dampers. When choosing those a first common application is to define what are the goals for the suspension system. For example, are we trying to improve the tire’s mechanical grip or maintaining the vehicle’s aerodynamic platform?

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:09:46Z

Godjka:

[[Category:Suspension]]

Introduction

In table 1 we presented the importance of having a suspension and a damping system. With that in mind the next step is to select our spring and dampers. When choosing those a first common application is to define what are the goals for the suspension system. For example, are we trying to improve the tire’s mechanical grip or maintaining the vehicle’s aerodynamic platform? Table 2 summarizes the three primary goals that we consider when selecting the spring and damper.

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:09:15Z

Godjka:

[[Category:Suspension]] 

Introduction

In table 1 we presented the importance of having a suspension and a damping system. With that in mind the next step is to select our spring and dampers. When choosing those a first common application is to define what are the goals for the suspension system. For example, are we trying to improve the tire’s mechanical grip or maintaining the vehicle’s aerodynamic platform? Table 2 summarizes the three primary goals that we consider when selecting the spring and damper.

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:08:41Z

Godjka:

[[Category:Suspension]] 

Introduction

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:08:06Z

Godjka:

[[Category:Suspension]] 

Introduction

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:06:57Z

Godjka:

[[Category:Suspension]]

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:06:37Z

Godjka:

=[[Category:Suspension]]

Introduction

=
For automotive applications, a vehicle suspension allows the controlled movement of the wheels relative to the vehicle body. In order to control it, passive, semi-active and/or active components are introduced. These enable the suspension system to adapt to various driving conditions. In most vehicles, this is achieved with a passive compliant structure (suspension). The vehicle suspension system consists of wishbones, springs, and shock absorbers to transmit and filter all forces between the body and road. If a vehicle has a passive suspension it will tend to oscillate under given inputs. To reduce the amount and duration of oscillation, some form of damping is required.

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:06:10Z

Godjka:

[[Category:Suspension]]

Introduction

For automotive applications, a vehicle suspension allows the controlled movement of the wheels relative to the vehicle body. In order to control it, passive, semi-active and/or active components are introduced. These enable the suspension system to adapt to various driving conditions. In most vehicles, this is achieved with a passive compliant structure (suspension). The vehicle suspension system consists of wishbones, springs, and shock absorbers to transmit and filter all forces between the body and road. If a vehicle has a passive suspension it will tend to oscillate under given inputs. To reduce the amount and duration of oscillation, some form of damping is required.

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:05:48Z

Godjka:

=[[Category:Suspension]]

Introduction=
For automotive applications, a vehicle suspension allows the controlled movement of the wheels relative to the vehicle body. In order to control it, passive, semi-active and/or active components are introduced. These enable the suspension system to adapt to various driving conditions. In most vehicles, this is achieved with a passive compliant structure (suspension). The vehicle suspension system consists of wishbones, springs, and shock absorbers to transmit and filter all forces between the body and road. If a vehicle has a passive suspension it will tend to oscillate under given inputs. To reduce the amount and duration of oscillation, some form of damping is required.

Purpose of a suspension

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in the table below.
{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due to the consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T17:04:35Z

Godjka:

=[[Category:Suspension]]

Introduction=
For automotive applications, a vehicle suspension allows the controlled movement of the wheels relative to the vehicle body. In order to control it, passive, semi-active and/or active components are introduced. These enable the suspension system to adapt to various driving conditions. In most vehicles, this is achieved with a passive compliant structure (suspension). The vehicle suspension system consists of wishbones, springs, and shock absorbers to transmit and filter all forces between the body and road. If a vehicle has a passive suspension it will tend to oscillate under given inputs. To reduce the amount and duration of oscillation, some form of damping is required.

=Purpose of a suspension=

The automotive industry uses different kinds of suspension systems. Important criteria are cost, weight, performance, packaging, manufacturing, kinematic properties and compliance attributes. A suspension and damping system can serve multiple purposes. Some of the reasons for having one are described in table 1.

{| class="wikitable"
|-
|Purpose 
|Description 
|-
|Improving driver and passenger comfort 
|A suspension acts as an interface between the the vehicle body and the road, reducing the passenger accelerations and movements. The accelerations of the vehicle body are also dependent on the amount of damping in the system. 
|-
|Reduce impulse forces 
|A compliant structure helps to reduce the peak forces in the vehicle structure due to external impacts. This helps to improve vehicle reliability and allows lighter structural designs. 
|-
|Static load distribution 
|A suspension is a controlled compliant structure that can be used to distribute the normal load between the wheels. 
|-
|Handling 
|The suspension can be used to influence the handling of the vehicle by changing the tire normal load distribution. This is achieved by adjusting the suspension stiffness distribution, the suspension geometry or by controlling the aerodynamic platform. The vehicle damping can also be used to influence the transient vehicle balance by changing the damping coefficients. 
|-
|Improve mechanical grip 
|A suspension is compliant over bumps and impacts. This can help to reduce the tire load variation (TLV) seen at the tire-road interface. TLV has a large impact on grip due to the delayed response of the tire to load variations and due to the load sensitivity of the tire. 
|-
|Aerodynamics 
|The balance and effect of the aerodynamics can be influenced on ride-height sensitive vehicles with a suspension system. The position and orientation of the vehicle body is also dependent on the amount of damping in the system. 
|-
|Transient Response
|The vehicle heave, pitches and rolls under inputs such as steering, throttle, brake application as well as large bumps and curb strikes, etc. Dampers help to control the response of these inputs.
|-
|Forced Vibration
|The vehicle can be excited in heave, pitch, roll and single wheel vibrations. This occurs particularly near the system’s resonance points and is due tothe consistent unevenness/bumpiness in the track. Damping can help to reduce the magnitude of this response.
|}

Suspension Reasoning

2020-05-19T16:59:44Z

Godjka:

[[Category:Suspension]]

For automotive applications, a vehicle suspension allows the controlled movement of the wheels relative to the vehicle body. In order to control it, passive, semi-active and/or active components are introduced. These enable the suspension system to adapt to various driving conditions. In most vehicles, this is achieved with a passive compliant structure (suspension). The vehicle suspension system consists of wishbones, springs, and shock absorbers to transmit and filter all forces between the body and road. If a vehicle has a passive suspension it will tend to oscillate under given inputs. To reduce the amount and duration of oscillation, some form of damping is required.

Suspension Reasoning

2020-05-19T16:57:54Z

Godjka: Created page with "Category:Suspension"

[[Category:Suspension]]

Thread:Talk:Weight/Weight - Add References/reply (2)

2020-05-15T21:26:36Z

Godjka: Reply to Weight - Add References

Thanks :)

Thread:Talk:Weight/Weight - Add References

2020-05-15T14:24:31Z

Godjka:

I think it would be important that we add references. This would help us to know where the information was taken from, and to double-check if the information is correct. I don't know if you are going to add a chapter about Weight Transfer, if so I would recommend RCVD chapter on this subject!

Thread:Talk:Weight/Weight - Add References

2020-05-15T14:23:32Z

Godjka: New thread: Weight - Add References

I think it would be important that we add references. This would help us to know where the information was taken from, and to double-check if the information is correct.

Talk:Mass

2020-05-15T14:23:32Z

Godjka: Talk page autocreated when first thread was posted

Thread:Category talk:Vehicle Dynamics/Subcategories that make sense/reply (9)

2020-05-15T14:21:19Z

Godjka: Reply to Subcategories that make sense

Additionally, what would be more important is to start adding content. And as we grow the pages we will start to have a clear idea of how each section should be.

Thread:Category talk:Vehicle Dynamics/Subcategories that make sense/reply (2)

2020-05-14T18:24:54Z

Godjka: Reply to Subcategories that make sense

If you allow me to give some input. I think that the Vehicle Dynamics subcategory should be focused on Simulation and Control Systems.

Tires and suspension should be their own category. They are not necessarily connected to Vehicle Dynamics. I think that the interesting topics to approach first for Vehicle Dynamics Category would be control systems and Simulation.

Category:Vehicle Dynamics

2020-05-14T18:15:09Z

Godjka:

[[Category:Vehicle]]

Category:Vehicle Dynamics

2020-05-14T18:14:46Z

Godjka:

[[Category:Vehicle]]
[[Category:Suspension]]

Category:Simulation

2020-05-14T17:15:05Z

Godjka: Created page with "This section is dedicated to the category of possible simulations that you can do in Vehicle Dynamics"

This section is dedicated to the category of possible simulations that you can do in Vehicle Dynamics

Category:Vehicle Dynamics

2020-05-14T17:13:44Z

Godjka:

[[Category:Vehicle]]
[[Category:Suspension]]
[[Category:Simulation]]