Unanticipated fault reconfiguration method for a telescope drive system based on the difference operator

DENG Zhuangzhuang1,2,3, YANG Shihai1,2, LI Yun1,2, XU Lingzhe1,2, LIU Ruiqiang1,2,3

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 267-274.

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PDF(2255 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 267-274.

Unanticipated fault reconfiguration method for a telescope drive system based on the difference operator

  • DENG Zhuangzhuang1,2,3, YANG Shihai1,2, LI Yun1,2, XU Lingzhe1,2, LIU Ruiqiang1,2,3
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Abstract

In extreme environments, the sensors of the permanent magnet synchronous machine (PMSM) in telescope drive system are prone to unanticipated faults (UFs), which leads to a decrease in the observation performance of the system and may even cause the telescope to shut down. Under these circumstances, a fault reconfiguration method for current sensors of telescope drive system is proposed, which mainly includes several aspects such as fault detection, isolation and reconfiguration (FDI-R). Among them, the fault detection is completed by the three-cascade difference operator (TCDO), which is robust to diverse types of faults, even incipient faults; the decision logic circuit performs isolation based on the fault signal flag provided by fault detection; Switches select appropriate currents via the isolation actions to achieve the purpose of fault reconfiguration. The simulation experiments suggest that the strategy switches from fault state to healthy condition smoothly without affecting the dynamic performance of the system, and guarantees the reliability and stability of the drive system.

Key words

telescope drive system / permanent magnet synchronous machine (PMSM) / unanticipated faults (UFs) / fault reconfiguration / difference operator

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DENG Zhuangzhuang1,2,3, YANG Shihai1,2, LI Yun1,2, XU Lingzhe1,2, LIU Ruiqiang1,2,3. Unanticipated fault reconfiguration method for a telescope drive system based on the difference operator[J]. Journal of Vibration and Shock, 2024, 43(14): 267-274

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