涡扇发动机性能退化缓解控制与推力设定

为了补偿性能退化发动机的推力损失,减轻飞行员工作负担,提高推进系统的自动化程度,开展了涡扇发动机性能退化缓解控制(EPDMC)研究。针对某型涡扇发动机部件级模型设计了具备稳态控制、加/减速过渡态控制和极限保护等功能的基准控制器;在此基础上设计了外环推力控制回路,给出1种在多参数约束下的推力设定方法,并设计了合理的切换逻辑确保内外环控制器能协调工作。MATLAB/Simulink下的仿真结果表明:该智能改进控制系统架构可以在保证发动机安全工作的前提下,通过合理地设定期望推力,最大程度地补偿推力损失,维持油门杆角度和推力的对应关系近似不变。

Research on Performance Deterioration Mitigating Control of Turbofan Engine and Thrust Setting

In order to compensate thrust loss of a deterioration turbofan engine, reduce pilot workload and increase the level of autonomy of the propulsion system, an investigation of the turbofan engine performance deterioration mitigating control(EPDMC) was conducted. An engine control system was designed firstly based on an unnamed low-bypass mixed exhaust turbofan engine with steady state control, acceleration/deceleration schedules and limit logic. Then an outer thrust loop based on the control system was investigated, with thrust setting method under multi-parameter constraints and controller switching logic ensuring coordination between inner and outer loop. The simulation results of MATLAB/Simulink tools indicate that the feasibility of the intelligent retrofit control architecture compensate the thrust loss and remain the throttle-to-thrust relationship unchanged approximately.