IMC-PID是利用内模控制原理来对PID参数进行计算，利用自然梯度算法，研究生时的现代信号处理的作业，使用混沌与分形分析的例程，基于SVPWM的三电平逆变的matlab仿真，使用matlab实现智能预测控制算法。-The IMC- PID is using the internal model control principle for PID parameters is calculated, Use of natural gradient algorithm, Modern signal processing jobs when the graduate, Use Chaos and fractal analysis routines, Based on SVPWM three-level inverter matlab simulation, Use matlab intelligent predictive control algorithm.