摘要
论文针对基于时域反射的高技术船舶电缆故障诊断方法中,因反射信号微弱、信号衰减大而造成难以诊断的问题,采用时频反射法使该类故障信息更明显,提高高技术船舶电缆故障诊断检出率。另外,反射信号因受噪声信号干扰而导致电缆故障误报,利用小波系数收缩算法对反射信号进行降噪处理,可降低电缆故障诊断误报率。论文通过实验对时域反射法和时频反射法进行了比较,结果表明电缆故障诊断的检出率和误报率均有明显改善。
Aiming at difficult diagnosis problem caused by weak reflected signal, big signal attenuation in high‐tech ships cable fault diagnosis method based on time domain reflection, time‐frequency diagnosis method is adopted to amplify the weak echo and improve hit rates. In addition, the threshold denoising method based on wavelet decomposition is studied to e‐liminate the interference of noise and reduce false alarm rates. Experiment is set to compare the time domain reflection and time‐frequency reflection, which shows that the proposed method can achieve higher hit rates and lower false alarm rates.
出处
《舰船电子工程》
2014年第12期161-165,共5页
Ship Electronic Engineering
关键词
船舶电缆
故障诊断
时频反射
ship cable
fault diagnosis
time-frequency reflection
