Method 4: CHR method for P/PI/PID loop tuning
Method 3: AMIGO PI controller tuning method
July 27, 2022Method 5: PI/PID tuning with pidtune function of Matlab
July 29, 2022- Can be used for P controller, PI controller, and PID controller tuning (but not PD controller tuning)
- There is no need to know the exact plant model. Only the response of the plant to step input is required for PI/PID loop tuning.
- Presenting PID/PI tuning guide in two separate tables; one for load disturbance rejection and the other one for command following (recall that with the 1DOF feedback control system we cannot have good disturbance rejection and command following at the same time, and the control system designer should determine the control priority in advance).
- In each table the control system designer can select the PID parameters (or PI controller parameters or the proportional controller gain) to arrive at a feedback control system with 0% or 20% overshoot in the closed loop step response.
- Controller design algorithm: Draw the tangent line with maximum slope to the step response of the process as shown in Fig. 2, and determine the parameters a and L (system time delay), and T (system time constant). Consider the controller transfer function as and calculate the parameters from Table 3 for disturbance rejection and Table 4 for command following.
Table 3: P/PI/PID controller tuning for load disturbance rejection using CHR method
Table 4: P/PI/PID controller tuning for command following using CHR method
Dr.Bayat
dr farshad