半主动浮筏隔振系统的模糊PID控制

对带有电流变液智能阻尼器的半主动双层浮筏隔振系统设计了一种模糊PID控制器.将半主动浮筏隔振系统中间质量的位移及其导数作为模糊控制器的输入,PID控制器的三个增益参数作为其输出,利用电流变液智能阻尼器的阻尼力可随电压变化的特性来降低中间质量的振动.仿真分析了多种激励下浮筏隔振系统的输出力响应.仿真结果表明:与最优被动阻尼和电流变液阻尼器最大阻尼系统相比,模糊PID控制下的半主动浮筏隔振系统的减振效果最好.

Fuzzy-PID control for semi-active floating raft isolation system

A fuzzy-PID controller is designed for semi-active floating raft isolation system featuring elec-tro-rheological (ER) damper. The inputs of the fuzzy controller are the deviation of the intermediate mass displacement and its derivative, while its outputs are proportional, integral, and derivative gains of PID con-troller. The vibration of the intermediate mass is reduced because of the damping force varying with differ-ent voltage. The output force responses of floating raft isolation system acted by many kinds of excitations are simulated. The simulation results indicate that the performance of semi-active floating raft isolation sys-tem designed with fuzzy-PID method is remarkably better than that of optimally passive damping and maximal damping.