| Citation: | LI Chen, WEN Binhe, ZUO Wei, et al. Design and verification of engine control system with digital electronic backup[J]. Journal of Aerospace Power, 2024, 39（8）：20220602 doi: 10.13224/j.cnki.jasp.20220602
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Based on the conventional dual redundancy digital electronic control system, a scheme of engine control system with digital electronic backup was proposed. When the main control system failed, the electronic backup system can take over the main control system to realize various functions of the engine, and improve the task reliability of the system. The backup system was built into the hydraulic and mechanical components to enhance the system’s electronic anti-interference and electromagnetic resistance. The results of semi-physical and engine tests verification showed that the main and backup systems, as well as the system and the engine worked well; the main and backup switching functions were normal, and smooth transition of the switching process parameters was realized. When switching in cruise state, the thrust disturbance was less than 1.5%; each control function of the backup system was normal, the control accuracy of the main control parameter pressure ratio was less than 0.1, the swing was less than 0.1, the control accuracy of the guide vane was less than 0.15°, and the swing was less than 0.2°, the fuel and guide vane followed well during acceleration and deceleration, and the steady-state and transient performance met the engine operating requirements; the heat dissipation design also met the operating requirements of the device.
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