机载综合热管理系统控制特性分析

以简化的机载综合热管理系统作为研究对象，对系统在不同控制模式下的变化特性进行分析，为系统控制方案的研究提供了理论依据。利用数学模型和计算机模型相结合的方法建立起一种以燃油为主要热沉，具有空气/燃油换热器、燃油/PAO（聚α烯烃）换热器等主要元器件的机载综合热管理系统整体模型，并提出一种模糊自整定的PID（比例-积分-微分）控制方法对燃油/PAO换热器和电子设备热变化等系统特性进行分析。结果表明:在热极限工况下，相对于开环控制，模糊自整定PID控制模式不仅能有效地控制燃油泵等一系列设备保持合适的转速，还可以保证电子舱及燃油/PAO换热器的出口温度保持在既定范围以内，进而满足机载综合热管理系统的设计要求。 

Analysis of control characteristics of airborne integrated thermal management system

Taking the simplified airborne integrated thermal management system as the research object，the change characteristics of the system under different control modes were analyzed，which provided a theoretical basis for the study of system control schemes.Using a combination of mathematical models and computer models to establish an airborne integrated thermal management system model with fuel as the main heat sink，air/fuel heat exchanger，fuel/PAO （polymerized alpha olefin） heat exchanger and other main components，and a fuzzy self-tuning PID （proportional-integral-derivative） control method was proposed to analyze system characteristics such as fuel/PAO heat exchanger and electronic equipment thermal changes.The results show that compared to open-loop control under thermal extreme conditions，the fuzzy self-tuning PID control mode can not only effectively control a series of equipment such as fuel pumps to maintain proper speed，but also ensure the electronic cabin and fuel/PAO heat exchanger.The outlet temperatures are kept within a predetermined range to meet the design requirements of the airborne integrated thermal management system.