Control system performance requirements

In order to achieve the basic tasks of automatic control, it is necessary to put forward requirements for the behavior of the system in the control process. The basic requirements for the control system are usually met by the system's response to a specific input signal. For example, it is expressed by the transition process of a unit step signal and some characteristic values ​​of the steady state. Under the premise of ensuring stability, the system's dynamic performance and steady-state performance are required to be good, that is:
The dynamic process is stable (stability);
The response action must be fast (rapidity);
The tracking value must be accurate (accuracy).