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第 30卷第 2期仪器仪表学报 Vol 30 No 2
2009年 2月 Chinese Journal of Scientific Instrument Feb. 2009
基于 H∞性能指标的旋转机械鲁棒控制器设计
刘爽, 刘彬, 时培明
2 2 (燕山大学电气工程学院秦皇岛 066004)
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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。
关键词: 旋转机械; H∞控制; 混合灵敏度; 解析设计
中图分类号: TH137 文献标识码: A 国家标准学科分类代码: 510. 8050
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Robust con troller design of rota ting mach ine ba sed
on the H ∞ performance index
L iu Shuang, L iu B in, Shi Peim ing
( Institute of Electrical Engineering, Yanshan U niversity, Q inhuangdao 066004, China )
Abstract: In order to supp ress the torsional vibration of rotating machine, a new robust controller is p roposed based
on the H∞ performance index. Instead of cop rime factorization, the controller is parameterized according to S/T
m ixed sensitivity functions. Besides avoiding p licated p rocess of the weigh function selection, this arithmetic
can be also app lied to unstable system s, and the controller is simp le and has a single tuning parameter. Through tun
ing the single parameter, the dynam ic characteristics of the closed loop system can be adjusted, and the results are
compared with the simulation results. A t last, experimentswere carried out, which p rove that the p roposed al