Question

X(s) R(s) ms Hardware gain PID controller Plant (a) PID in Forward Path X(s) R(s)+ ms Kas (b) PI in Forward Path, D in the return path A regulator is a class of control systems that aim to hold the output value at a designated level. The input to a regulator is a set point which changes infrequently. When change occurs, it takes the form of a step. PID controllers used regulate a quantity will typically use the method of Figure 2(b) in preference to that of Figure 2(a). Why?

Answer 1