Design of cryogenic balance temperature control system based on MCGS and PLC and analysis of its influence relationship

Abstract To address the issue of slow temperature adjustment in cryogenic balance, which severely affects the efficiency of wind tunnel tests, this study investigates the temperature control system for cryogenic balance. Considering the wide temperature range and deep cooling requirements of cryogenic wind tunnels, a comprehensive design of the temperature cryogenic was developed. Based on MCGS and PLC, the first domestically developed cryogenic balance temperature control system was implemented. After installation, equipment testing and wind tunnel experiments were conducted. The experimental results indicate that the newly developed system achieves stable temperature control from room temperature to 110 K, which operates reliably, conserves energy, and significantly improves the economic efficiency of cryogenic wind tunnel tests. Furthermore, an analysis of the relationships between balance temperature range, system pressure, and wind tunnel temperature on the system’s thermal performance during tests provides valuable insights for precise control in future applications.