齿轮点蚀原始信号，可用于信号处理

VMD程序，用于轴承、齿轮等振动信号的分解、降噪和重构，实现故障诊断

多自由度的非线性动力学方程组求解齿轮振动耦合

VMD程序，用于轴承、齿轮等振动信号的分解、降噪和重构，实现故障诊断

对简单的二级减速齿轮箱齿轮故障的振动信号进行仿真，便于理论分析。

Since the first edition there have been many changes in the equipment available for measurements and the growing interest in Transmission Error measurement has spawned numerous approaches that are not always clearly described. Each author has a tendency to extoll the virtues of his approach but rarely points out the corresponding disadvantages, so I have attempted to compare systems. A range of new problems in from industry has generated some interesting additional topics. I have also added discussion of some of the less common but puzzling topics such as high contact ratio gears which are increasingly being used to reduce noise. Testing procedures are also discussed in more detail together with some practical problems and some slightly extended description of the failures that may be encountered and their relationship, or lack of it, to noise problems. I hope that few errors or mistakes have crept into the book but if readers discover errors I will be very grateful if they let me know (e-mail jds 1002@eng.cam.ac.uk)