潜艇浮筏隔振系统的控制研究

Control for Floating Raft Isolation System

为带有电流变阻尼器的双层浮筏隔振系统设计了一种半主动模糊滑模控制器。根据滑模运动方程稳定的Hurwitz判据选择了滑模面系数,并根据滑模到达条件设计了半主动模糊滑模控制器。仿真分析了浮筏隔振系统在扫频激励信号下的力传递率及双频激励信号下输入力和输出力的曲线。仿真结果表明:半主动模糊滑模控制下浮筏隔振系统的减振效果要远好于最优被动阻尼系统。

A semi-active fuzzy sliding mode controller was designed for floating raft isolation system with electro-rheological （ER） damper. Coefficient of sliding mode surface was selected in accordance with Hurwitz stable judgement of sliding mode motion equation. According to reaching condition and the controlled damping force assuring the increment of energy dissipation of stable system, a semi -active fuzzy sliding mode controller was designed. Force transmissibility, input force, and output force response of floating raft isolation system, respectively, under chirp exciting signal and dualfrequency exciting signal were simulated. The simulation results indicate that the performance of floating raft isolation system designed with semi-active static output feedback fuzzy sliding mode control method is remarkably better than those of optimally passive damping.