Describe how the broad subject of dynamics is applied to veh

Describe how the broad subject of dynamics is applied to vehicles in vehicle dynamics. What skills does it require to conquer vehicle dynamics topics?

Solution

Vehicle Dynamics refers to the dynamics of the vehicles, here assumed to be ground vehicles. Vehicle dynamics is a part of engineering primarily based on classical mechanics. This articvle applies primarily to automobiles.

The dynamic behavior of vehicles can be analysed in several different ways. This can be as straightforward as a simple spring masss system, through a three degree of freedom bicycle model, to a large degree of complexity using a multibody system simulation package such as MSC ADAMS or Modelica.

As computers have gotten faster, and software user interfaces have improved. Commercial packages such as CarSim have become widely used in industry for rapidly evaluating hundreds of test conditions much faster than real time. Vehicle models are often simulated with advanced controller designs provided as software in the loop (SIL) with controller design software such as Simulink, or with physical hardware in the loop (HIL).

Vehicle motions are largely due to the shear forces generated between the tires and road, and therefore the tire model is an essential part of the math model. The tire model must produce realistic shear forces during braking, Acceleration, cornering and combinations on a range of surface conditions. Many models are in use. Most are semi-empirical such as the Pacejka Magic Formula model.

Simulators are also a form of vehicle dynamics simulation. In early versions many simplifications were necessary in order to get real time performance with reasonable graphics. However, improvements in computer speed have combined with interest in realistic physics, leading to driving simulations that are used for vehicle engineering using detailed models such as CarSim.

It is important that the models should agree with real world test results, hence many of the following tests are correlated against results from instrumented test vehicles.

Techniques Include :-

Components, attributes or aspects of Vehicle dynamics include:-

Some skills like driving techniques which relates to, or improve the stability of vehicle dynamics include :-