Study of a multi-strategy controller on a helium liquefier

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Lei, L.L.^1,2 ; Meng, Y.R.^1,2 ; Peng, N.^1 ; Xiong, L.Y.^1 ; Tang, J.C.^1 ; Dong, B.^1 ; Liu, L.Q.^1

Technical Institute of Physics and Chemistry, CAS, Beijing

100190, China^1

University of Chinese Academy of Sciences, 100190, China^2

关键词: Compressor suction;    Controlling system;    Nuclear fusion;    Operation process;    Outlet pressures;    Steady state;    Turbine inlet pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012026/pdf
DOI  :  10.1088/1757-899X/171/1/012026

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Helium liquefier is widely used in the fields of superconducting, nuclear fusion energy and high-energy physics. However, the present PID controlling system of the liquefier is not able to keep the compressor suction pressure, outlet pressure and turbine inlet pressure all in the expected range at the same time. Thus, a multi-strategy controller for a helium liquefier is proposed in this paper. A dynamic simulation model of this liquefier is also developed and shown. To study the control effect, an operation process including cool-down, steady-state and pulse of heat is described. The simulation result of this process is presented and compared with the result of the present PID controlling system.