PID的流程简单到了不能再简单的程度，通过误差信号控制被控量，而控制器本身就是比例、积分、微分三个环节的加和。里面的源代码都是由C语言所实现。-PID process is simple to a simple degree can not be controlled by the amount of error signal control, and the controller itself is proportional, integral, differential sum of thr