An Online Detection and Locating Method for Spacecraft Bus Faults
Hong Bo1,Wang Li1,Mao Jianmei1,Yin Jing2,Shu Dehua2
1.Department of Electrical Engineering Nanjing University of Aeronautics & Astronautics Nanjing 210016 China; 2.Shandong Aerospace Electronic Technology Institute Yantai 264000 China
Abstract：Aiming at the spacecraft bus fault online detection and locating problem,an online detection method with high locating accuracy based on the spread spectrum time domain reflectometry (SSTDR) is built.Firstly,the locating error of the SSTDR is analyzed.By increasing the sample frequency of the detection system,the location error can be reduced to be within ±0.2 m,which can meet the fault locating demand for the short distance bus.Then,the problem of wrong detection results caused by the mismatched source impedance is analyzed furtherly when using the SSTDR method.By adding a trapper to prevent the signal from spreading to the power supply side,the influence of the mismatched source impedance is eliminated and the correctness of the bus fault detection is guaranteed.The experimental results show that the adopted method can realize accurate online detection and locating for bus open-circuit and short-circuit faults.
洪博，王莉，毛健美，尹晶，舒徳华. 一种航天器一次母线故障在线检测定位方法[J]. 电工技术学报, 2016, 31(5): 118-125.
Hong Bo,Wang Li,Mao Jianmei,Yin Jing,Shu Dehua. An Online Detection and Locating Method for Spacecraft Bus Faults. Transactions of China Electrotechnical Society, 2016, 31(5): 118-125.
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2016, Vol. 31 
