基于极小化条件数的电液伺服控制系统观测器设计  

Observer Design for Electro-hydraulic Servo-controlling Systems Through Minimization of Condition Number

作　　者：明廷涛[1] 张永祥[1] 应冬[2] 孙云岭[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033 [2]海军驻438厂军事代表室,武汉430060

出　　处：《机械科学与技术》2008年第4期499-502,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：设计良好的状态观测器是电液伺服控制系统故障诊断研究的关键。本文提出一种电液伺服控制系统观测器设计的新方法。针对所构建的位置伺服系统,建立系统的离散非线性模型,绘制系统的离散观测器结构,推导极小化条件数梯度下降法的算法流程并运用该算法优化计算观测器的增益矩阵和Lipschitz常数,为系统设计一个Lipschitz非线性离散观测器。将该观测器与现有的电液伺服控制系统观测器进行比较,发现本文所采用的方法具有计算简单、设计优良等特点。Excellent observer design is crucial for diagnosis of electro-hydraulic servo-controlling systems. This paper proposes a new method of observer design for electro-hydraulic servo-eontroUing systems. The structure of the observer is provided. A systematic computational procedure for minimization of condition number is developed based on the gradient flow principle. Using this method, the observer gain matrix and Lipschitz constant are optimized. A Lipsehitz nonlinear observer of discrete time for the positioning system is designed. Results show that our new method is simple in computation and effective in design compared with other existing methods.

关 键 词：电液伺服控制系统 观测器 极小化条件数 LIPSCHITZ常数 

分 类 号：TP137.9[自动化与计算机技术—控制理论与控制工程]