基于H_∞性能指标的旋转机械鲁棒控制器设计  

Robust controller design of rotating machine based on the H_∞ performance index

作　　者：刘爽[1] 刘彬[1] 时培明[1] 

机构地区：[1]燕山大学电气工程学院,秦皇岛066004

出　　处：《仪器仪表学报》2009年第2期313-317,共5页Chinese Journal of Scientific Instrument

基　　金：国家十一五重大科技攻关项目(2007BAF02B10);河北省自然科学基金(F2008000882);河北省教育厅科学研究计划(ZH2007102;2007496)资助项目

摘　　要：针对大型旋转机械轴系中存在的低频扭振失稳现象,提出一种基于H∞性能指标的鲁棒控制器解析设计方法,该方法不必对控制对象进行互质分解,通过对S/T混合灵敏度函数的研究,避免了权函数繁琐的选取过程,同时能保证其对不稳定和临界稳定对象的有效性,所设计的控制器结构简单,并能实现单参数整定。调节控制器参数,对比仿真结果研究其对相对旋转系统动态特能的影响,最后通过实验平台验证该算法能够实现对旋转机械扭转振动的有效控制。In order to suppress the torsional vibration of rotating machine, a new robust controller is proposed based on the H∞ performance index. Instead of coprime factorization, the controller is parameterized according to S/T mixed sensitivity functions. Besides avoiding the complicated process of the weigh function selection, this arithmetic can be also applied to unstable systems, and the controller is simple and has a single tuning parameter. Through tuning the single parameter, the dynamic characteristics of the closed-loop system can be adjusted, and the results are compared with the simulation results. At last, experiments were carried out, which prove that the proposed algorithm can realize effective control of the torsional vibration of rotating machine.

关 键 词：旋转机械 H∞控制 混合灵敏度 解析设计 

分 类 号：TH137[机械工程—机械制造及自动化]