基于LMI的H_∞控制在电液负载模拟器中的应用  

Application of H∞ Control Based on LMI in Electro-hydraulic Load Simulator

作　　者：王经甫 叶正茂[1] 张辉[1] 李洪人[1] 崔浏[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《机床与液压》2007年第5期169-171,204,共4页Machine Tool & Hydraulics

摘　　要：针对电液负载模拟器加载系统中存在的不确定性因素,通过选择适当的权函数,采用混合灵敏度的H∞方法设计并用基于线性矩阵不等式的算法求解鲁棒控制器。实验验证了该控制器在弹簧刚度发生变化时具有鲁棒性,并且结合结构不变性原理能有效抑制多余力,提高被动加载的性能。Aiming at uncertainty in loading system of electrohydraulic load simulator, robust controller was designed by mixed sensitivity H ∞ approach through choosing suitable weighted functions, and was solved through linear matrix inequality algorithm. It＇ s testified by experiments that robust controller has robustness when spring stiffness changes. It can eliminate superfluous force and improve passive loading performance with compensation of structure invariance principle.

关 键 词：H∞控制 线性矩阵不等式 混合灵敏度 电液负载模拟器 多余力 

分 类 号：TH137[机械工程—机械制造及自动化]