大型挠性结构基于独立模态空间的模糊PID控制  

Fuzzy PID Vibration Control of Large Flexible Structures Based on IMSC

作　　者：司洪伟[1] 李东旭[1] 

机构地区：[1]国防科学技术大学,长沙410073

出　　处：《中国空间科学技术》2005年第3期59-65,共7页Chinese Space Science and Technology

基　　金：国防预研基金(413200501)资助项目

摘　　要：模糊控制器对于复杂不确定系统的控制具有很强的适应性,将模糊逻辑和PID控制器结合起来用于解决一类大型挠性结构空间桁架这一复杂系统的振动控制问题;并结合结构振动常用的独立模态空间控制方法,克服大型空间桁架不能建立精确的数学模型所带来的弊端,有效地抑制了由于模态溢出或耦合产生的差拍现象。仿真结果表明这一模糊PID控制器对于高阶、非线性的大型空间桁架振动控制是有效的。Prportional-Integral-Derivative （PID） controllers are perhaps the most widely used controllers in modern industries because of its reliability, simplicity and validity. Fuzzy logical controllers are good at higher-order, time-delayed and nonlinear systems. Combining fuzzy logic controllers with PID controllers, a kind of controllers is designed in this paper, to resolve the vibration control of a complex system made of large flexible structure-space frame. The simulation result shows that fuzzy PID controllers are more effective in suitable structural vibration control by suppressing overflow especially for those systems with vague mathematical models.

关 键 词：桁架结构 挠性结构 模糊控制系统 振动控制 空间 模糊PID控制器 独立模态空间控制 空间桁架 结构振动 不确定系统 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程] TP273.4[自动化与计算机技术—检测技术与自动化装置]