齿轮箱在线故障诊断系统设计及应用

为了尽早发现齿轮箱台架寿命试验中的故障发生及其位置，避免对试验设备及人员造成伤害，针对齿轮箱工作过程中的安全问题，开发了一套齿轮箱在线故障诊断系统。该系统利用加速度传感器检测箱体的振动信号，通过时域分析实现齿轮箱试验的实时监测与故障预警；对时域信号进行时频域分析，采用ZFFT（基于复调制的细化频谱算法）细化频谱方法处理频域信号，通过分析典型故障信号特征，建立故障特征向量，实现故障类型判定。试验结果表明，该系统能实现齿轮箱故障预判，并能准确识别出典型故障。

Design and application of online fault diagnosis system for gear box

In order to detect the occurrence and location of the faults in the life test of the gearbox bench as soon as possible and to avoid causing damage to the test equipment and personnel, a gearbox online fault diagnosis system is developed. The system uses acceleration sensors to detect the vibration signals of the box and realizes real-time monitoring and fault early warning of the gearbox test through time-frequency domain analysis. The system performs time-frequency domain analysis on time-domain signals by using ZFFT refined spectrum method to process frequency-domain signals, and analyzing the characteristics of typical fault signals to realize fault type determination. The test results show that the system can realize gearbox failure prediction and accurately identify typical failures.