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基于自適應預測控制的PEMFC動態(tài)特性研究
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國家自然科學基金資助項目(51405286)和上海市電站自動化技術重點實驗室開放基金資助項目(13DZ2273800)


Dynamic Behaviors of PEMFC Based on Adaptive Prediction Control
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    摘要:

    質子交換膜燃料電池(PEMFC)是具有多參數(shù)影響的復雜系統(tǒng),針對其時變、非線性及不確定性導致其輸出動態(tài)特性難以控制的問題,設計了自適應預測控制器。該控制器以PEMFC系統(tǒng)的神經網絡模型作為預測模型,充分利用神經網絡對非線性系統(tǒng)的擬合能力,并在控制過程中實時對神經網絡連接權值、閾值進行優(yōu)化,實現(xiàn)自適應預測的滾動優(yōu)化,保證了控制器對PEMFC控制的實時性;在控制過程中將輸出電壓分別反饋至自適應模型及預測控制前端,以提高系統(tǒng)的響應速度和控制精度。驗證結果表明:基于自適應預測的控制方法具有較強的魯棒性,學習能力強,控制精度高,并具有自適應能力,對質子交換膜燃料電池輸出動態(tài)特性的穩(wěn)定性具有較好的控制效果。

    Abstract:

    PEMFC is a complex system which is often affected by many parameters. Its time-varying performance, nonlinear performance and uncertainty lead to its dynamic output unable to be controlled. Taking that into account, the controller based on adaptive prediction control was designed to control the dynamic output of PEMFC. The neural network model of PEMFC system was used as a predictive model of the controller, which could make full use of the nonlinear fitting ability of neural networks. Through optimizing the neural network connection weights and threshold in real time, receding horizon optimization could be realized, which could guarantee the real-time control and the effective electrochemical reaction. During the control process, the control precision and response speed of the system could be improved by the introduction of the negative feedback control to the front of adaptive model and predictive control. The simulation results show that the adaptive prediction controller owns adaptive ability, stronger robustness, stronger learning ability and higher control precision, and it has perfect control effect on the dynamic stability of proton exchange membrane fuel cell output characteristics. 

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呂學勤,段利偉,姜英杰.基于自適應預測控制的PEMFC動態(tài)特性研究[J].農業(yè)機械學報,2015,46(5):350-356. Lü Xueqin, Duan Liwei, Jiang Yingjie. Dynamic Behaviors of PEMFC Based on Adaptive Prediction Control[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(5):350-356.

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  • 收稿日期:2015-01-26
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  • 在線發(fā)布日期: 2015-05-10
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