陕西科技大学学报(自然科学版)
陝西科技大學學報(自然科學版)
협서과기대학학보(자연과학판)
Journal of Shaanxi University of Science and Technology (Natural Science Edition)
2015年
6期
167-171,178
,共6页
分数阶控制器%一阶时滞对象%Smith预估控制%鲁棒性
分數階控製器%一階時滯對象%Smith預估控製%魯棒性
분수계공제기%일계시체대상%Smith예고공제%로봉성
fractional order controller%first order plus time delay (FOPTD) system%Smith predictor control%robustness
针对一阶大时滞对象,提出了一种分数阶PIλ控制器设计方法,利用相位裕度指标设计控制器,并通过优化分数阶次λ来增强系统对控制对象参数变化的鲁棒性。为了与常规的控制方法进行公平的比较,采用同样的相位裕度指标设计了整数阶PI控制器,并采用直接综合方法设计了Smith预估控制器。仿真结果表明,分数阶PIλ控制和Smith预估控制的鲁棒性明显优越于整数阶PI控制。
針對一階大時滯對象,提齣瞭一種分數階PIλ控製器設計方法,利用相位裕度指標設計控製器,併通過優化分數階次λ來增彊繫統對控製對象參數變化的魯棒性。為瞭與常規的控製方法進行公平的比較,採用同樣的相位裕度指標設計瞭整數階PI控製器,併採用直接綜閤方法設計瞭Smith預估控製器。倣真結果錶明,分數階PIλ控製和Smith預估控製的魯棒性明顯優越于整數階PI控製。
침대일계대시체대상,제출료일충분수계PIλ공제기설계방법,이용상위유도지표설계공제기,병통과우화분수계차λ래증강계통대공제대상삼수변화적로봉성。위료여상규적공제방법진행공평적비교,채용동양적상위유도지표설계료정수계PI공제기,병채용직접종합방법설계료Smith예고공제기。방진결과표명,분수계PIλ공제화Smith예고공제적로봉성명현우월우정수계PI공제。
A tuning method of fractional order proportional integral controller is proposed for the first order plus long time delay system .The specification of phase margin is utilized to design the controller ,and an optimization is conducted to choose a proper parameter λto en‐hance the robustness of the system to the variation of the plant′s parameters .In order to have a fair comparison with conventional control methods ,the same specification of phase margin is used in this paper to design the integer order proportional integral controller and the direct synthesis method is utilized to design the Smith predictor controller .Simulation re‐sults show that the robustness of fractional order proportional integral controller and Smith predictor controller is superior to integer order proportional integral controller .