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J4  2014, Vol. 48 Issue (1): 141-148    DOI: 10.3785/j.issn.1008-973X.2014.01.022
电气工程     
高阶控制系统动态性能分析
陈旭东,程放,冯攀
安徽新闻出版职业技术学院 印刷工程系,安徽 合肥 230601
Dynamic performance analysis of high-order control system
CHEN Xu-dong, CHENG Fang, FENG Pan
Printing Engineering Department, Anhui Press and Publication Vocational College, Hefei 230601, China
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摘要:

为了解决直流电机复合定位控制系统(CPCS)设计过程中定位精度与定位稳定性之间的矛盾,使用MATLAB对CPCS及PID的根轨迹、频率特性及动态响应等进行分析和比较.结果显示,高阶控制系统传递函数总可以采用降阶的方式简化为具有一个实数极点、一个实数零点和2对复共轭极点的基本5阶形式.分析各零、极点对系统动态性能的影响发现,可以通过改变主导极点阻尼比及交接频率来提高定位精度,但该过程必然导致系统稳定性降低,引起速度振荡,且该振荡只有通过调节非主导复共轭极点B的方式来压制或消除.

Abstract:

Root locus maps, the frequency characteristics, and the dynamic response curves were analyzed and compared for composite positioning control system (CPCS) and PID systems on MATLAB in order to solve the contradiction between the positioning accuracy and the stability during the design process of the DC motor CPCS. Results show that the high-order control system transferring function can be simplified as the basic five order form of a real zero, a real pole, and two pairs of complex conjugate poles by using reduced-order method. Further analysis of the zero and poles impact on system dynamic performance indicates that the positioning accuracy can be improved by changing the dominant pole damping ratio and handover frequency value. The process will inevitably lead to reduced system stability and can cause velocity oscillation. The oscillation can only be suppressed or eliminated by regulating the non-dominant complex conjugate poles B.

出版日期: 2014-01-01
:  TM 33  
基金资助:

安徽省高等学校省级自然科学研究重点资助项目(KJ2014A256).

作者简介: 陈旭东(1968-),男,副教授,从事电气控制研究.E-mail:chxd1122721@sina.com
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引用本文:

陈旭东,程放,冯攀. 高阶控制系统动态性能分析[J]. J4, 2014, 48(1): 141-148.

CHEN Xu-dong, CHENG Fang, FENG Pan. Dynamic performance analysis of high-order control system. J4, 2014, 48(1): 141-148.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.01.022        http://www.zjujournals.com/eng/CN/Y2014/V48/I1/141

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