Several design method of control system

Guideposts

For linear systems, control indicators can be clearly refined, such as rise time in time domain analysis, overshoot, bandwidth in frequency domain analysis and so on, and then the controller can be designed according to these refined indicators. However, for nonlinear systems, these indicators are not easy to handle, because different inputs lead to completely different responses, and frequency domain analysis is impossible. Therefore, for nonlinear systems, we usually consider the indicators in the field of interest:

Stability

Accuracy and Speed of Response

Robustness: sensitivity to disturbance

Cost: There are usually the complexity of Actuator, Sensor and controllers.

Third, the steps of control design

Determination of control targets, sensors and actuators (that is, what are the measurable signals and control inputs)

Research and Modeling of Plant

Controller design (many design methods)

Simulation test and analysis (usually done on a computer)

Implementation and verification (specific physical system)