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输出反馈控制(或称输出反馈动态补偿器)是一种引人注目的控制方案。本文介绍了利用计算机进行多变量线性定常系统输出反馈控制辅助设计的方法及程序包。这个程序包由具有二次型性能指标的状态反馈控制设计程序、输出反馈控制参数起始值确定程序和最优输出反馈控制设计程序三个部分构成。程序用Fortran Ⅵ语言写成。一般控制系统的计辅设计程序软件包中都包括有具有二次型性能指标状态反馈控制的设计程序,此处不再赘述。对于开环不稳定的系统输出反馈控制参数起始值的选择十分困难。本文介绍了利用罚函数法对那些相应于不可直接测得的状态反馈加罚的方法。在输出反馈控制设计计算中应用了Flctcher—Reeves的最优化方法,在优化搜索过程中,对闭环系统的特征值进行校验,以防止因步长过大闭环系统进入参数不稳定区域,而使计算机溢出的问题。文章给出了利用这个程序包所设计的四阶不稳定系统的输出反馈控制器的实例,并且给出了根据计算结果所构成的微型机实时控制系统的响应曲线。实验结果是令人满意的。
Output feedback control (or output feedback dynamic compensator) is a compelling control scheme. This paper presents a method and a package of computer aided design of output feedback control for multivariable linear systems. This package consists of three parts: the state feedback control design program with quadratic performance index, the initial value determination program of output feedback control parameters and the optimal output feedback control design program. The program is written in Fortran VI language. The general design of the control system of the auxiliary design package includes a quadratic performance status feedback control design process, not repeat them here. It is very difficult to choose the starting value of the output feedback control parameters of open-loop instability system. This article describes the use of penalties for those corresponding to measures that can not be directly measured by the state feedback penalty. The Flctcher-Reeves optimization method is applied in the design of output feedback control. During the optimization search process, the eigenvalues of the closed-loop system are checked to prevent the closed-loop system from entering the unstable parameter area due to the step size. Computer overflow problem. The article gives an example of the output feedback controller of the fourth-order unstable system designed by using this package, and gives the response curve of the real-time microcomputer control system which is composed of the calculation results. The experimental results are satisfactory.