具有不可测输出变量的系统状态观测器的实现

The State Observer of the Systems with Unmeasurable Output Variables

状态反馈是现代控制理论中一种非常重要的控制规律。在工程实践中,当状态变量不能直接检测时,通常构造系统的渐近状态观测器来重构系统的状态以实现状态反馈。在以往的文献中,状态观测器的设计都是默认系统的输出完全可测。然而在工程实践中,由于物理或经济条件所限,某些控制系统的输出变量并不能够完全可测。本文针对这类具有不可测输出变量的系统,讨论了状态观测器的实现方法,数字仿真验证了该方法的有效性。

State feedback is a kind of very important control law in the modern control theory. In the engineering practice when the state variables could not be measured directly they are usually constructed by＇ the asymptotic state observer of the system to realize the state feedback. In the past literatures when designing the state observers, authors all took it for granted that the output variables could be measured completely. However, in the engineering practice limited by the physical or economic conditions, the output variables of some control systems could not be measured completely. In this paper the realization method of the state observer is discussed for this kind of control systems with unmeasurable output variables. The validity of the proposed method is demonstrated through the numerical simulation.