Expected Electrical Life Prediction of AC Contactor Based on Rough Set and Evidence Theory
Sun Shuguang1, Wang Ruixiong1, Du Taihang1, Wang Jingqin2, Cui Jingrui1
1. School of Artificial Intelligence Hebei University of Technology Tianjin 300130 China; 2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China
Abstract：At present, the research on the electrical life prediction of low-voltage electrical apparatus mostly focuses on the residual electrical life prediction. However, predicting the expected electrical life is more effective in guiding the use and maintenance of products and improving the reliability of the system during service period. AC contactor's initial state characteristics can reflect the length of the individual's electrical life to a certain extent, so a method for predicting the expected electrical life of AC contactor based on rough set and evidence theory was proposed. Firstly, the rough set theory and corresponding calculation were used to obtain the key initial state characteristics through twice screening. Secondly, the weight set of key initial state characteristics was established by subjective and objective comprehensive weighting method and the matching degree table of verification sample's key initial state characteristics was established based on the attribute condition density. Finally, the independent evidence was constructed by the matching degree table and weight set, then evidence theory was used to fuse evidences and decide the individual's expected electrical life grade of verification sample. The measured data proves that in the case of small samples, the method can qualitatively evaluate the expected electrical life of the AC contactor and the prediction effect is good.
通讯作者:
孙曙光 男,1979年生,博士,副教授,研究方向为智能检测与故障诊断。E-mail: sunshuguang_2000@163. com
作者简介: 王锐雄 男,1994年生,硕士研究生,研究方向为检测技术与自动化装置。E-mail: 1362052701@qq. com
引用本文:
孙曙光, 王锐雄, 杜太行, 王景芹, 崔景瑞. 基于粗糙集与证据理论的交流接触器预期电寿命预测[J]. 电工技术学报, 2020, 35(10): 2158-2169.
Sun Shuguang, Wang Ruixiong, Du Taihang, Wang Jingqin, Cui Jingrui. Expected Electrical Life Prediction of AC Contactor Based on Rough Set and Evidence Theory. Transactions of China Electrotechnical Society, 2020, 35(10): 2158-2169.
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