A novel flexible fuel thermal management architecture with a switched mode control strategy is proposed that provides a framework for increasing the thermal endurance of aircraft that use fuel as a heat sink. Multiple flow topologies within this architecture can be realized by using two valves to provide a range of fuel recycling configurations. The flexible thermal management system uses multiple modes of operation to achieve the goal of extending thermal endurance by switching between modes to achieve the best available configuration given the current operating condition. Dynamic inversion-based controllers are developed for each mode and are used to regulate the temperature at the hottest point in the system to a desired value. A high-level supervisory controller switches among four separate feedback control laws and manages the available flow paths within a fixed structure of pipes, valves, and tanks. The flexible fuel thermal management architecture and controller are tested over a range of simulated operating conditions. Under these conditions, the supervisory controller chooses a path that stores returning hot fuel to avoid overheating of aircraft systems and releases the hot fuel when excessive heat loads are no longer present. The proposed architecture allows for a large operational envelope.

提出了一种具有切换模式控制策略的新型灵活燃料热管理架构，该架构为提高使用燃料作为散热器的飞机的耐热性提供了框架。通过使用两个阀门来提供一系列燃料回收配置，可以实现该架构内的多流拓扑。灵活的热管理系统使用多种操作模式，通过在模式之间切换以实现给定当前操作条件的最佳可用配置来实现延长热耐久性的目标。为每种模式开发了基于动态逆变的控制器，用于将系统中最热点的温度调节到所需值。高级监控控制器在四个独立的反馈控制规则之间切换，并管理管道、阀门和罐的固定结构内的可用流动路径。灵活的燃料热管理架构和控制器在一系列模拟操作条件下进行了测试。在这些条件下，监管控制器选择一条路径来存储返回的热燃料以避免飞机系统过热，并在不再存在过多热负荷时释放热燃料。提议的架构允许大的操作范围。监督控制器选择一条路径来存储返回的热燃料以避免飞机系统过热，并在不再存在过多的热负荷时释放热燃料。提议的架构允许大的操作范围。监督控制器选择一条路径来存储返回的热燃料以避免飞机系统过热，并在不再存在过多的热负荷时释放热燃料。提议的架构允许大的操作范围。