Dynamic analysis of semi-active vehicle suspensions using a co-simulation approach

A multi-body virtual prototype of heavy truck is presented in ADMAS/CAR software. Two kinds of adjustable damper control system are established within MATLAB/Simulik virtual environment, including semiactive ‘on-off’ control and semi-active magneto-rheological (MR) control based on revised Bingham model. In addition, co-simulation to the whole truck system is finished through building interface successfully. After simulating on stochastic road, the results show that the semi-active ‘on-off’ and MR control all can minimize the root mean square (r.m.s) seat vertical acceleration, r.m.s suspension deflection and r.m.s dynamic tire force compared with passive control. They can improve vehicle dynamical performance, weaken vehicle body vibration and increase ride comfort. But semiactive MR control effects are better than ‘on-off’ control. The co-simulation technology offers a new way to model and control complex dynamic system.