JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (5): 64-70.doi: 10.6040/j.issn.1672-3961.0.2017.167

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Sensor fault tolerant switch strategy for multi-motor synchronous system based on ADRC

MAO Haijie1,2, LI Wei1,2*, WANG Kehong1, FENG Xiaolin1,2   

  1. 1. College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China;
    2. Key Laboratory of Gansu Advanced Control for Industrial Processes, Lanzhou 730050, Gansu, China
  • Received:2017-01-22 Online:2017-10-20 Published:2017-01-22

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Abstract: Focusing on multi-motor synchronous control system which was susceptible to variable load and random disturbance, an active disturbances rejection control(ADRC)technique was used to improve the synchronous performance. Based on the principle of sensorless vector control, an extended state observer(ESO)was used in the current loop to obtain the estimated speed with observation of its extended state. The residual signal between actual speed and estimation speed was analyzed to realize fault diagnosis. In order to ensure the safe operation of the fault system, a flexible adaptive switching strategy based on fault diagnosing evaluation of reliability was proposed to ensure smooth transition in case of requiring. Simulation results showed the effectiveness of the proposed method.

Key words: fault tolerant control, sensor fault diagnosis, ADRC, multi-motor synchronous control

CLC Number: 

  • TP277
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