基于脉冲宽度预测的速度反馈机制研究

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Abstract In order to solve the problem that speed feedback accuracy of AC speed control system is easily affected because of the speed sensor fault, line fault and the electromagnetic interference, pulse width prediction method is proposed in this paper for the first time. Speed detection model is built and sensor signal duty ratio and the function of distortion degree is derived, so as to forecast the next sensor pulse width, and thus sensor fault and signal interference is effective identification. By setting the fault tolerance and interference tolerance, the identification results and observed value obtained by the extended state observer are combined to establish the corresponding speed feedback mechanism. Simulation and experimental results show that this method can effectively prevent that the system is under attack because of the unknown factors, and robustness of the control system is increased to a great degree.

Key words： Speed sensor electromagnetic interference fault diagnosis pulse width prediction speed feedback

Received: 21 December 2013 Published: 05 November 2014

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TM315

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	Articles by authors
	Zhang Yongkang
	Zhang Yongjun
	Wang Jing
	Li Huade

Cite this article:

Zhang Yongkang,Zhang Yongjun,Wang Jing等. Research on Speed Feedback Mechanism Based on Pulse Width Prediction[J]. Transactions of China Electrotechnical Society, 2014, 29(10): 81-89.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I10/81

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