Review of Analog Feedback Control Systems
Jean Mbihi · 2018
The principle of an analog feedback control system of a dynamic process involves the application of a control law, allowing the reduction of the possible error between desired output and generated response. The structures of simple analog controllers can be readily implemented by means of several embedded operational amplifiers and passive components (resistors and capacitors). This chapter tabulates electronic diagrams and transfer functions of simple analog controllers. Dynamic models of analog controllers can be easily discretized in order to be implemented by a digital processor. The digital environment offers new algorithmic possibilities for implementing structures of adaptive PID/PIDF controllers, using connectionist components of artificial intelligence, based on: fuzzy logic and neural network. The problem of the PID controller is reformulated and solved in the space state similar to that of an linear quadratic regulator (LQR), which is easier to solve.