PARAMETER TUNING METHOD OF UNKNOWN PID CONTROLLER

摘要

A parameter tuning method of an unknown proportional-integral-derivative (PID) controller is provided. The unknown PID controller is replaced with the control algorithm of the generic controller to perform the optimal parameter tuning to obtain the target parameter of the generic controller. The unknown PID controller is set with a first parameter group so that the corresponding input signal, the control signal and the output signal are measured for performing the parameter identification procedure of the generic controller to obtain a second parameter group of the generic controller. When the second parameter group is not within a specification range of the target parameter, the first parameter is re-calculated and modified by a direct search method in accordance with the difference between the second parameter group and the target parameter for setting the unknown PID controller again, and then the input signal, the control signal and the output signal are measured again.

主权项

1. A parameter tuning method of an unknown proportional-integral-derivative (PID) controller, comprising:
receiving a system model of a target system by a parameter tuning device, wherein the unknown PID controller correspondingly generates a control signal according to a difference between an output signal outputted by the target system and an input signal in order to control the target system, and the target system is controlled by the control signal to correspondingly generate the output signal; receiving a performance specification by the parameter tuning device; performing, by the parameter tuning device, an optimal parameter tuning by a control algorithm of a generic controller to obtain a target parameter of the generic controller according to the system model and the performance specification; setting the unknown PID controller with a first parameter group in order to measure the input signal, the control signal and the output signal; performing, by the parameter tuning device, a parameter identification procedure on the generic controller to calculate a second parameter group of the generic controller according to the input signal, the control signal and the output signal; and when the second parameter group of the generic controller is not within a specification range of the target parameter of the generic controller, modifying the first parameter group for setting the unknown PID controller again, and then measuring the input signal, the control signal and the output signal again, wherein the specification range is determined by the performance specification.