Dynamic Characteristics of Fully Active and Bandwidth-Limit Active Suspension

摘要

The implementation strategy of active suspension of vehicles can be mainly divided into two kinds. The first kind is called fully active suspension system, the second is called bandwidth-limit active suspension system. The main characteristic of fully active suspension system is that the actuator is parallel connected to the traditional suspension system, and the actuator of bandwidth-limit active suspension system is installed in series connection to the traditional suspension system. The differences between the two constructions result in different characteristics. In this paper, a quarter car fully active suspension model and bandwidth-limit active suspension model are both established, by means of optimal linear quadratic regular design method, a practical PID controller is derived. Through a hydroelectric servo vibrating system, the dynamic response characteristics of fully active suspension system and bandwidth-limit active suspension system are systematically tested and analyzed. This can be a grate help to the practical design of an active suspension system, and the testing results are also given out.