Title :
LEDA LLRF control system performance: model and operational experience
Author :
Regan, A.H. ; Kwon, S.I. ; Wang, Y.M. ; Ziomek, C.D.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
In modern industrial control, a relay experiment can be used for auto-tuning a PI controller. It gives the ultimate frequency and ultimate gain of the open loop system. Based on the ultimate gain and the ultimate frequency, the PI control parameters, the proportional gain, and the integration time, are determined. A relay experiment can be used to determine the sensitivity of a closed loop system against external disturbances. This paper addresses a method to estimate the sensitivity represented by the gain margin of a closed loop low-level RF (LLRF) control system based on the Matlab/Simulink model of the Low Energy Demonstration Accelerator (LEDA) RFQ. This paper discusses some of the modeling performed and our operational experience to date
Keywords :
accelerator control systems; closed loop systems; linear accelerators; proton accelerators; two-term control; LEDA LLRF control system performance; Low Energy Demonstration Accelerator; PI controller; closed loop low-level RF control system; closed loop system; external disturbances; integration time; open loop system; operational experience; proportional gain; relay experiment; ultimate frequency; ultimate gain; Closed loop systems; Control system synthesis; Control systems; Mathematical model; Open loop systems; PD control; Radio frequency; Relays; System performance; Transfer functions;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795449
