粒子群优化齿轮箱故障诊断源程序,采用优化算法后，效率大大提高-the source program of gearbox fault diagnosis based on particle swarm optimization，After using optimization algorithm, the efficiency is greatly increased

针对齿轮箱故障诊断的问题，提出了一种基于BP神经网络和DS 证据理论的不确定性信息融合方法。(In order to realize a stable and effective gearbox fault diagnosis system, an uncertain information fusion method based on BP neural network and modified DS evidence theory is proposed.)

包含三个M文件，程序为本人自行编译完成，Demo中设有仿真信号验证，并经本人实际齿轮箱信号（轴承外圈故障）测试，经包络分析结果显示能够有效定位轴承外圈故障频率。 亲测可用。(It contains three M files. The program is compiled and completed by myself. Demo has simulation signal validation. It has been tested by my actual gear box signal