基于差分运算的望远镜驱动系统非预期故障重构方法  

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

作　　者：邓壮壮 杨世海[1,2] 李运[1,2] 徐灵哲[1,2] 刘睿强 DENG Zhuangzhuang;YANG Shihai;LI Yun;XU Lingzhe;LIU Ruiqiang(Nanjing Institute of Astronomical Optics&Technology,Chinese Academy of Sciences,Nanjing 210042,China;CAS Key Laboratory of Astronomical Optics&Technology,Nanjing Institute of Astronomical Optics&Technology,Nanjing 210042,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院南京天文光学技术研究所,南京210042 [2]中国科学院天文光学技术重点实验室(南京天文光学技术研究所),南京210042 [3]中国科学院大学,北京100049

出　　处：《振动与冲击》2024年第14期267-274,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(11973065);青年科学基金(12303089);国家自然科学基金联合基金项目重点支持项目(U1931207);江苏省卓越博士后计划(2022ZB449);国家留学基金管理委员会(CSC201904910254);中国科学院海外留学基金(徐灵哲)支持。

摘　　要：极端环境下的望远镜驱动系统永磁同步电机传感器容易面临非预期故障,导致系统观测性能下降,甚至可能造成望远镜停机。在这种情况下,提出一种用于望远镜驱动系统电流传感器的故障重构方法,主要包含故障检测、隔离和重构等几个方面。其中,故障检测由三阶级联差分运算完成,对不同的故障类型、即使微小故障也能有很好的鲁棒性;决策逻辑电路根据故障检测提供的故障信号flag执行隔离操作;Switches开关根据隔离动作选择合适的电流,以达到故障重构目的。仿真试验表明,该方法从故障状态切换到健康状态是平稳的,且不影响系统的动态性能,确保驱动系统的可靠性和稳定性。In extreme environments,the sensors of the permanent magnet synchronous machine in a telescope drive system are prone to unanticipated faults,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 the telescope drive system was proposed,which mainly included several aspects of functions such as fault detection,isolation and reconfiguration.Among them,the fault detection was completed by a three-cascade difference operator,which was robust to diverse types of faults,even to incipient faults;the decision logic circuit performed isolation according to the fault signal flag provided by fault detection;the Switches selected appropriate currents in accordance with the isolation actions to achieve the purpose of fault reconfiguration.The simulation experiments indicate that the strategy can switch 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.

关 键 词：望远镜驱动系统 永磁同步电机 非预期故障 故障重构 差分运算 

分 类 号：TH751[机械工程—仪器科学与技术] TP2[机械工程—精密仪器及机械] P111.2[自动化与计算机技术—检测技术与自动化装置]