The results of simulation and test in gearwheel fault diagnosis prove that Time-Frequency analysis can reduce noise and detect weak abnormal signal effectively by designing reasonable kernel function.

• 仿真分析和齿轮早期故障检测实验证明，通过核函数的合理设计，能够有效滤除噪声，实现对机械设备早期故障产生的微弱异常振动信号的检测。