An Overview of PID Theories on FOLIPD Model of Economic Negative Feedback

The paper mainly made an overview of PID simulation theories on FOLIPD model of economic negative feedback whose transfer function is a formulation of first order lag and integrator plus delay. It realized PD or PID controller with more conspicuous effect, and can be put to use in control process of economic negative feedback with high precision. The paper, by comparison, illustrated the simulation results of the system response that based on the expatiating on algorithm thoughts. The point to be emphasized here is that the negative feedback theory plays an important role in analyzing how far the supplies and demands can go balance and not how to do that.