机构地区: 华南理工大学自动化科学与工程学院自动化与网络工程系
出 处: 《华南理工大学学报(自然科学版)》 1995年第6期1-6,共6页
摘 要: 本文研究了一类非线性广义系统的状态观测器问题。在理想系统(不存在干扰、不确定项和非线性项的广义线性定常系统)完全可观测的条件下,根据不同的情况,分别利用广义系统解的基本理论和正常系统Lyapunov稳定性理论,对所研究的广义非线性系统分别设计了全阶的奇异Luenberger型非线性状态观测器和降阶的正常线性或非线性变结构状态观测器。从所得结论可知,在系统结构确定的情况下,只要非线性项满足Lipshitz条件,则系统存在奇异全阶非线性状态观测器;若系统存在干扰和不确定项,只要干扰和不确定项有界,系统存在降价的正常线性或变结构非线性的鲁棒状态观测器。 In this paper, the problem of state observer for a class of nonlinear singular system is studied. Under the condition that ideal system (singular linear constant system without disturbance,uncertainties and nonlinear) is completely obserable,full order singular Luenberger form nonlinear observer and reduced order normal linear or nonlinear variable structure observer are designed, respectively,by using foundation theories of singular system solution and Lyapunov stability theories based on different case. It is shown that,when the system structure is certain,there exists singular full order Luenberger nonlinear observer if nonlinear satisfies Lipschitz condition. When the system has disturbance and uncertainties,there exists reduced order normal linear or variable structure nonlinear robust observer.