Study Of Coupling Control Between Semi-active Suspension And Powered Steering System Based On CAN-bus

At present, it is day by day mature for the research of vehicle subsystems control, such as ASS(Active Suspension System), EPS(Electronic Powered System), ABS(Anti-lock Brake System), AT(Automatic Transmission) and so on. The different control method utilization improved the performance of vehicle subsystems, and also improved the relations between human and the vehicle. But the vehicle is a integrator, subsystems will affect and disturb each other. Therefore it is necessary to have research on coupling control among various subsystems which have motive relations.The coupling control, is to increase the coupling controller on the foundation of united control system, enable it to amend the badness performance of original vehicle, and the goal is to promote the overall performance of the vehicle. The advantage is that it will not change the original structure of subsystems, the coupling controller exists independently, thus it can keep the merit of original subsystems, and also can improve the overall performance of the vehicle at a certain extent. Simultaneously it is easy to be extended on industrial.To build a virtual prototype model of entire vehicle which include a semi-active suspension system and a powered steering system using ADAMS/VIEW, to design controllers of the semi-active suspension system and the powered steering system based on MATLAB/SIMULINK separately, and realized the united simulation of ADAMS and MATLAB/SIMULINK through the ADAMS/Control module. After having the corresponding simulation experiment, it confirmed the validity of virtual prototype model and controllers. And take this united control model as the foundation of coupling control research.In foundation of the united control model of semi-active suspension and powered steering system, to design a coupling controller which take depressing the lateral angle as its goal based on the vehicle chassis CAN-bus network. The powered steering controller upload the signal of steering angle to CAN-bus, the coupling controller receives this signal via CAN-bus, then process it and calculate the activation force coefficient of left and right hand suspensions. After all transmit this coefficient to the semi-active suspension controller, thus realizes the coupling control of semi-active suspension system and powered steering system. After having some simulation experiments, the controller depressed the lateral angle effectively. It confirmed this controller is in effect, and provide a kind of approach for the following research on coupling control.