多变量自校正控制的一种方法

A METHOD OF MULTIVARIABLE SELF-TUNING CONTROL

至今为止,几乎所有关于多变量自校正调节器和自校正控制器的研究报道都是在假定系统时滞相等的条件下进行讨论的,并且在线辨识参数较多。但是,多变量系统时滞不等在工程上也是经常遇到的,因此,提出一种解决此类系统的简单、有效的控制方法具有一定工程实用价值。本文试图通过选取适当的拟合系统模型和控制性能指标,提出了一种解决时滞不等时最小方差调节器和自校正控制的方法,在线辨识参数减少,并证明了这种自校正控制方法在最小方差控制性能指标和白噪声干扰下具有多变量自校正特性。最后,给出了部分计算机仿真结果。

Thus far, most of the published papers concerning multivariable selftuning regulators and controllers are based on researches undertaken under the supposition of equal system time delays and a number of parameters have to be identified on line. However, occurance of difference in time delay in multivariable systems is not too seldom in engineering fields. To propose a simple and efficient method of control is therefore of practical significance. This paper is based on a selection of the appropriate system model and corresponding control target, and presents a method to solve the minimum variance regulator and self-tuning control problem for multiwariable systems with difference in time delays. The self-tuning property of this method is verified in the case of minimum variance control target and white noise disturbance. With this method, the number of parameters to be identified on line is reduced. Part of the results of a simulation is given as an example.