PID control law
Thread Content
During the project and when implementing control, we choose different control methods depending on the specific objects involved. As for PID control, I am aware of two types: error-type PID and derivative-lead PID. Are there any other control methods? How should we select the appropriate PID control method? Different DCS systems come with various functional blocks; how can these control methods be implemented? I would appreciate it if experts could provide guidance. Thank you!
There are many ways to adjust PID in DCS configurations; generally, there are ready-made function blocks available. To be honest, I’m not very familiar with this aspect. In a TPS system, for just one basic PID control formula, four options are available; in PID control, some functions rely on deviation values while others use PV values. At a higher level, there are also feedforward PID, feedback PID with external presetting, and PID with a position proportional controller. In fact, there are far more PID controllers used in complex circuits than these.
PID control is a combination of three basic elements: P, I, and D; some versions also include a damping element. There are numerous possible combinations, and the choice of combination depends on the characteristics of your process control system. You can refer to the principles of automatic control for guidance
It would be best to have relevant materials to take a look at