基于时变传输路径的太阳轮故障窄带解调分析方法
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摘要
行星齿轮箱是风力机传动装置的重要组成部分,其振动特征提取在故障诊断领域具有重要意义。为此,提出了一种适合故障特征信号解调及时变传递路径的太阳轮故障窄带解调分析方法。利用Tukey窗对振动信号进行加窗处理;利用计算阶比跟踪对加窗信号进行等角度重采样,转换为准平稳角域信号,并进行同步平均;对加窗角域平均信号进行窄带解调分析,通过其阶比频谱编辑分离出太阳轮故障相关阶比分量后转换到角域信号,获取太阳轮故障特征及故障位置。试验数据分析结果表明,该方法能有效识别太阳轮故障特征信息。
A planetary gearbox is the crucial component of a wind turbine device. A method for analyzing sun gear faults, which is suitable for the cases of fault characteristic signal demodulation and time-varying transmission path, was proposed. First, the fault vibration signal was processed by adding the Tukey window function, and the windowed signal in time domain was sampled at constant angle increments according to the computed order tracking(COT), which converts the non-stationary signal in the time domain into the stationary one in the angle domain. Then, the angle-domain signal was processed by the signal synchronous average(SA) and successively by the narrow-band demodulation. Finally, the fault order components of the sun gear were seperated from the edited order spectrum and retransformed into the angle-domain to further obtain the sun gear fault features and locations. Tests were conducted to verify the validity of the proposed method.
A planetary gearbox is the crucial component of a wind turbine device. A method for analyzing sun gear faults, which is suitable for the cases of fault characteristic signal demodulation and time-varying transmission path, was proposed. First, the fault vibration signal was processed by adding the Tukey window function, and the windowed signal in time domain was sampled at constant angle increments according to the computed order tracking(COT), which converts the non-stationary signal in the time domain into the stationary one in the angle domain. Then, the angle-domain signal was processed by the signal synchronous average(SA) and successively by the narrow-band demodulation. Finally, the fault order components of the sun gear were seperated from the edited order spectrum and retransformed into the angle-domain to further obtain the sun gear fault features and locations. Tests were conducted to verify the validity of the proposed method.
引文
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[13]WANG W.Early detection of gear tooth cracking using the resonance demodulation technique[J].Mechanical Systems and Signal Processing,2001,15(5):887-903.
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[2]MCFADDEN P D,SMITH J D.A signal processing technique for detecting local defects in a gear from the signal average of the vibration[J].ARCHIVE Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science,1985,199(4):287-292.
[3]FYFE K R,MUNCK E.Analysis of computed order tracking[J].Mechanical Systems&Signal Processing,1997,11(2):187-205.
[4]MCFADDEN P D.A technique for calculating the time domain averages of the vibration of the individual planet gears and the sun gear in an epicyclic gearbox[J].Journal of Sound and Vibration,1991,144(1):163-172.
[5]SAMUEL,CONROY J K,PINES D J.Planetary transmission diagnostics[R].Washington D.C.:NASA,2004.
[6]HA J M,YOUN B D,OH H,et al.Autocorrelation-based time synchronous averaging for condition monitoring of planetary gearboxes in wind turbines[J].Mechanical Systems&Signal Processing,2015,70:161-175.
[7]LEI Y,HAN D,LIN J,et al.Planetary gearbox fault diagnosis using an adaptive stochastic resonance method[J].Mechanical Systems and Signal Processing,2013,38(1):113-124.
[8]FENG Z,LIN X,ZUO M J.Joint amplitude and frequency demodulation analysis based onintrinsic time-scale decomposition for planetary gearbox fault diagnosis[J].Mechanical Systems and Signal Processing,2016,72/73:223-240.
[9]冯志鹏,褚福磊.行星齿轮箱故障诊断的频率解调分析方法[J].中国电机工程学报,2013,33(11):112-117.FENG Zhipeng,CHU Fulei.Frequency demodulation analysis method for fault diagnosis of planetary gearboxes[J].Proceedings of the CSEE,2013,33(11):112-117.
[10]王志乐,郭瑜,曹永立,等.基于角域加窗同步平均的太阳轮故障检测方法[J].振动与冲击,2017,36(13):74-79.WANG Zhile,GUO Yu,CAO Yongli.Fault detection method of sun gear based on windowed synchronous average in angle domain[J].Journal of Vibration and Shock,2017,36(13):75-79.
[11]李康强,冯志鹏.基于生成微分方程的行星齿轮箱故障振动信号解调分析[J].振动与冲击,2017,36(8):9-15.LI Kangqiang,FENG Zhipeng.Signal demodulation via the generating differential equation method for planetary gearbox fault diagnosis[J]Journal of Vibration and Shock,2017,36(8):9-15.
[12]MCFADDEN P D.Detecting fatigue cracks in gears by amplitude and phase demodulation of the meshing vibration[J].Journal of Vibration and Acoustics,1986,108(2):165-170.
[13]WANG W.Early detection of gear tooth cracking using the resonance demodulation technique[J].Mechanical Systems and Signal Processing,2001,15(5):887-903.
[14]罗德扬.相位解调与扭转振动分析[J].昆明理工大学学报(理工版),1996,21(1):63-68.LUO Deyang.Phase demodulation and torsional vibration analysis[J].Journal of Kunming University of Science and Technology(Natural Science),1996,21(1):63-68.