多自由度平台微振动LQG最优控制  

LQG Optimal Control for Micro Vibration of MDOF Platform

作　　者：周晓宏[1] 

机构地区：[1]深圳职业技术学院电子与信息工程学院

出　　处：《装备制造技术》2010年第8期4-5,共2页Equipment Manufacturing Technology

基　　金：深圳市“嵌入式系统设计重点实验室”资助(LES201001)

摘　　要：从理论分析和数值仿真两方面,对微振动隔振平台的结构设计及被动控制和主动控制相结合的混合控制系统进行了研究,建立了以空气弹簧为被动隔振元件、超磁致伸缩致动器为主动隔振元件的多自由度混合隔振系统,及其动力学模型和控制系统模型,并利用最优控制理论和相关领域的最新研究成果,对其进行了仿真实验,结果表明所设计的LQG最优控制器能在基础干扰和直接干扰下,使平台在X方向的位移时程和速度时程的控制效果,明显优于被动控制。The structure design of MDOF microvibration platform,as well as hybrid control system by coupling passive control with active control,is investigated through theoretical analysis and numerical studies.A multi-degree-of-freedom hybrid control system using air springs and magnetostrictive actuators is developed,with the establishment of dynamic model of platform and control system model.Some numerical studies are conducted in light of optimal control theory and the latest research results in related fields.The simulink results show that the LQG optimal control is superior than passive control,based on the displacement time histories and velocity time histories in X directions of hybrid control system under both ground motion and direct disturbance.

关 键 词：多自由度平台 混合控制 LQG最优控制 动力学模型 

分 类 号：TB535[理学—物理] TP273[理学—声学]