Title :
A fault detection method based on wavelet theory for satellite power systems
Author :
Wang Dong ; Zhang Shaojie ; Shuang Weifang ; Wang Li ; Yin Jing ; Yuan Yuanming
Author_Institution :
Coll. of Autom., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
Considering that the temperature sensors of satellite power systems are sensitive to the noise, a fault detection method based on the theory of wavelet entropy and the wavelet multi-scale products is purposed to reduce the influence of the noise. Wavelet entropy is applied to amplify the signal-noise ratio by finding the optimal de-noising threshold. Besides, by using of the multi-scale products, the proportion coefficients are further magnified. Then the fault time could be determined by the modulus maximum. Finally, simulation for a class of satellite power systems is conducted, verifying the effectiveness of the proposed method.
Keywords :
aircraft power systems; entropy; fault diagnosis; power system reliability; wavelet transforms; fault detection method; modulus maximum; optimal denoising threshold; satellite power system; signal-noise ratio amplify; temperature sensors; wavelet entropy theory; wavelet multiscale products; Entropy; Noise; Noise reduction; Power systems; Satellites; Wavelet coefficients; De-noising; Fault Detection; Satellite Power Systems; Wavelet Entropy; Wavelet Multi-scale Products; Wavelet Transform;
Conference_Titel :
Control and Decision Conference (CCDC), 2015 27th Chinese
Conference_Location :
Qingdao
Print_ISBN :
978-1-4799-7016-2
DOI :
10.1109/CCDC.2015.7162354
