吸气式发动机冲压模态燃油/喷管容错控制计划研究

A dissimilar fault-tolerant control plan is proposed to address the problem that an actuator sensor failure affects the safe operation of the engine during the thrust state control. In this method，the fuel closed-loop / nozzle open-loop and nozzle closed-loop/fuel open-loop control plans are backed up to each other，and combined with an inertial switching logic，the control plan is switched to ensure the safe operation of the engine when the actuator sensor fails. The simulation verification is carried out for the ramjet mode of tandem TBCC engine. The results show that the fault-tolerant control plan can realize the fault-tolerant control of thrust state in the whole envelope of the engine，and can switch smoothly when sensors fails，thrust fluctuation is less than 1%，which enhances the fault tolerance of the control system.