基于机械泵控制的毛细分离式喷雾冷却回路热控系统仿真分析

摘要

To realize high heat flux dissipation for spacecrafts operating in the harsh space environment and in different working modes, a well-designed thermal control system using the capillary separate spray cooling loop (CSSCL) based on the PID and fuzzy incremental control strategy with a mechanical pump is presented. A 4-node thermal network mathematical representation is established by the node network method and is implemented by the numerical simulation method to analyze the temperature dynamic performance of the thermal control system. The result shows that the CSSCL thermal control system based on the fuzzy incremental control strategy with the pump can achieve a precise thermal control of the controlled object with a faster response and a smaller overshoot than the PID control, which can be used for the development of future spacecraft with the need of high heat flux dissipation of space electronics.%文章分析用于空间环境下的毛细分离式喷雾冷却回路热控系统原理，通过节点网络法建立该热控系统4节点热网络模型；运用数值仿真方法，以机械泵为控制对象，对该系统分别采用PID控制和模糊增量控制方案的热控效果进行对比。结果表明，模糊增量控制与PID控制相比，超调量较小且达到稳态时间短，具有良好的控制鲁棒性。