The Research of PID Control in a Large Scale Helium Refrigerator

[摘要] In the development of a helium refrigerator, the control of load temperature stability is an important requirement. We usually use multistage control strategies to achieve the precise control of it. Each level has its strict control logic. PID controllers are the core control module in the process. Therefore, a research of its principle and parameters' setting occupies an important position in the development work. This paper detailed describes the PID control principle used in a large scale helium refrigerator of 10kW@20K, as well as several improvements on PID parameters' setting, by using simulations and experiments in combination. The temperature is eventually controlled more precise.

[发布机构] State Key Laboratory of Technologies in Space Cryogenic Propellants, TIPC/CAS, Beijing; 100190, China^1

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Control principle;Control strategies;Helium refrigerators;Large-scale helium refrigerators;Load temperature;PID controllers;PID parameters;Precise control