D-S证据理论数据融合，用于信号特征提取、信号消噪，正确率可以达到98％，matlab程序运行时导入数据文件作为输入参数，基于SVPWM的三电平逆变的matlab仿真，本科毕设要求参见标准测试模型。-D-S evidence theory data fusion, For feature extraction, signal de-noising, Accuracy can reach 98 , Import data files as input parameters matlab program is running, Based on SVPWM three-level inverter matlab simulation, Undergraduate complete set requirements refer to the standard test models.