Title :
A new approach to closed loop autotuning for PID controllers
Author :
Luo, Rongfu ; Qin, S.Joe ; Chen, Dapang
Author_Institution :
Nat. Instrum. Inc., Austin, TX, USA
Abstract :
A simple method for the autotuning of PID controllers which keeps the PID controllers in closed loop is proposed. A limit circle is generated through setpoint relay to extract relevant information about the process dynamics. Ziegler-Nichols tuning formulas based on the reaction curve method and the ultimate gain and ultimate period method are used to calculate the PID parameters. Extensive simulations have shown that the proposed method is accurate and needs not to switch off the existing controller
Keywords :
closed loop systems; limit cycles; relay control; three-term control; tuning; PID controllers; Ziegler-Nichols tuning formulas; closed loop autotuning; limit circle; reaction curve method; setpoint relay; ultimate gain; ultimate period method; Control design; Control systems; Electrical equipment industry; Industrial control; Joining processes; Relays; Switches; Three-term control; Transfer functions; Uncertainty;
Conference_Titel :
American Control Conference, 1998. Proceedings of the 1998
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-4530-4
DOI :
10.1109/ACC.1998.694689
