基于预测控制策略的智能框架结构主动控制研究

针对框架系统所具有的复杂性、不确定性、大柔度等特点,为保证系统控制的顺利实现,在系统可控性格拉姆矩阵与可观性格拉姆矩阵相等的基础上,本文采用了模型降阶方法,取最初的几阶模态,经过系统离散进行控制。本文采用了能够控制不精确模型及未知外力情况下可以达到较好控制效果的广义预测控制,同时考虑到许多状态变量不可测量的特点,选用次优控制的方案。最后给出了计算实例,结果表明这一方法是有效的。

Studies on Active Control of Intelligent Frame Structures Based on Predictive Control

In consideration of the complexity,nondeterminacy and flexibility of an intelligent frame structure,a condensation method for the control of the structure is proposed in the paper,so as to perform the control smoothly.In the method,only the first several modes of the structure are taken as the controlled objet,which will be discrete in the control system.In this work,two control schemes are adopted:the generized predictive control scheme and the sub optimal control scheme.The fomer can achieve fairly good effect of control on the system with an imprecise model and unknown external forces,while the later satisfies the system with many immeasurable state variables.The results of a numerical example show the effectiveness of the method.