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華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (12): 20-26 DOI10.13245/j.hust.201204

欄目:自動化技術
執行器隱含退化下系統壽命預測與延壽方法
李 煒 , 王成文
蘭州理工大學 1.電氣工程與信息工程學院;2.甘肅省工業過程先進控制重點實驗室;3.電氣與控制工程國家級實驗教學示范中心,甘肅 蘭州 730050
摘要 針對執行器退化監測數據存在測量誤差的閉環控制系統壽命預測與延壽控制問題,首先,以帶測量誤差的非線性Wiener模型描述了不確定測量值與執行器隱含退化狀態之間的關系,并基于卡爾曼濾波技術估計出實際退化狀態;其次,通過定義因執行器隱含退化而驅使控制系統退化的三個階段,結合動態與穩態性能約束集確定系統退化失效閾值,并據此及執行器退化狀態的估計值得到控制系統剩余壽命預測分布的解析解;然后,將執行器退化狀態納入線性二次調節器(LQR)控制器設計中,提出了基于執行器實時退化狀態的自適應延壽控制策略,通過折衷平衡系統性能與控制作用來延緩執行器的退化,從而實現延長控制系統生命周期的目的;最后,通過雙容水箱液位系統驗證了所提出方法的有效性.
關鍵詞 執行器 ;延壽控制 ;剩余壽命 ;測量誤差 ;隱含退化狀態
Research on remaining useful life prediction and life extension of control system with implicit degradation of actuators
LI Wei , WANG Chengwen
1.College of Electrical and Information Engineering;2.Key Laboratory of Gansu Advanced Control for Industrial Processes;3.National Demonstration Center for Experimental Electrical and Control Engineering Education,Lanzhou University of Technology,Lanzhou 730050,China
Abstract Aimed at the problems of life prediction and extended life control of closed-loop control systems with measurement errors in actuator degradation monitoring data,firstly,the relationship between the uncertain measurement data and the implied degradation state of the actuator was described by the nonlinear Wiener model with measurement error,and the actual degradation state was estimated by Kalman filtering technique.Secondly,combined the dynamic and steady-state performance constraint sets,the system's degradation failure threshold was determined by the three degradation stages that drive the control system to be degraded due to the actuator's implicit degradation.Through the estimation of system degradation threshold and actuator degradation state,the analytical solution of residual life prediction distribution of control system was obtained.Then,the actuator degradation state was incorporated into the design of the linear quadratic regulator (LQR) controller,and an adaptive life extension control strategy based on the real-time degradation state of the actuator was proposed.By the trade-offs between control system performance and control action to slow degradation the actuator,thus the purpose of extending the life cycle of the control system was achieved.Finally,the validity of the method in the paper was verified by the double-tank water tank level system.
Keywords actuator ; life extension control ; remaining useful life ; measurement error ; implied degradation state
基金資助國家自然科學基金資助項目(61763027,61364011,62063017).

中圖分類號TP202;TP207
文獻標志碼A
文章編號1671-4512(2020)12-0020-07
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文獻來源
李 煒, 王成文. 執行器隱含退化下系統壽命預測與延壽方法[J]. 華中科技大學學報(自然科學版), 2020, 48(12): 20-26
DOI:10.13245/j.hust.201204
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