Research Of Virtual Prototyping Of Vehicle Stability Control And Hardware In Loop Simulation

Four Wheel Steering (4WS) system and Vehicle Stability Control (VSC) system are newly created control technology for active safety, which are important parts of active chassis control technology. The connection of these two technologies will improve the performance of handling and stability, and has important effect for avoiding traffic. This article makes a research on the dynamic response of 4WS and VSC system based on the Virtual Prototyping Technique. In addition, it has discussed the simulation of hardware in loop system based on dSPACE and real vehicle platform. It mainly contains the following:1. Simply introduce research status, working theory and character of 4WS and VSC.2. Simply introduce research method of multiple-body dynamics, simulation method with software of both ADAMS and MATLAB/Simulink.3. Give mathematical model of 4WS, 4WS with VSC of two freedoms separately. Based on the mathematical model, taking yaw rate and side slip angle as the control variables, use linear quadratic method of optimal control theory to design controller parameter K, then realize to control the vehicle model.4. Referring to the whole vehicle model of experiment platform, build the Virtual Prototyping of the whole vehicle in the surrounding of ADAMS/View, set up the system figure of control system in MATLAB/Simulink, then realize the connecting simulation of multi-body dynamics and closed loop control system.5. Through the simulation compare the effect of handling stability on vehicle virtual model with different control method and controller parameter. In addition. Using optimal control method, compare the effect of handling stability with different vehicle structure parameters.6. Based on dSPACE system and vehicle experiment platform, make the research of hardware in loop simulation and achieve a satisfying control effect. Connecting virtual prototyping simulation and hardware in loop simulation, use steering angle measured in the hardware in loop system as the input of virtual prototyping, and compare the dynamic response in two experiments. In addition, use steering angle and rear wheel angle measured in hardware loop system as the inputs of virtual prototyping model, simulate the driving track in hardware in loop simulation approximatively.Through the connecting simulation, we can see that the system of 4WS plus with VSC can better the evaluation parameters and improve the vehicle handling stability. Through connecting virtual prototyping simulation and hardware in loop simulation, you can use the prototyping model in ADAMS to simulate the driving status of hardware in loop vehicles.