利用虚拟仪器技术,采用LabVIEW图形编程环境,设计了一个数字PID程序,用于仿真PID控制规律。可以通过改变P、I、D参数和设定值，观察不同情况下的控制曲线，或在同样参数情况下比较位置型PID与增量型PID的控制效果-The virtual instrument technology, using the LabVIEW graphical programming environment, design a digital PID program for the simulation of PID control law. Can change the P, I, D parameters and settings to observe the control curve under different circumstances, or in the case of the same parameters comparative position PID and incremental PID control results