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针对微型涡喷发动机转子转速闭环设计的控制结构中涡轮出口温度对燃油供给率变化敏感的问题,尤其在快速推油门杆时可能会超温,提出了1种带涡轮出口温度限制保护的闭环限制控制器的设计方法。该方法采用了双回路的闭环结构方式,并采用控制参数相似变换的增益调度增量式PI控制方法,实现了稳态/过渡态的发动机转速、温度闭环控制,所述算法在Simulink环境下进行了地面和高空的仿真验证。结果表明:控制系统在保证转子转速伺服跟踪性能的要求下还具有温度保护功能。
Aiming at the problem that the outlet temperature of the turbine is sensitive to the variation of the fuel supply rate in the control structure of the closed-loop design of the rotor speed of the micro-turbojet engine, especially when the throttle rod is rapidly pushed, a closed-loop limitation with a temperature limit protection of the turbine outlet is proposed Controller design method. This method uses a double-loop closed-loop structure, and uses incremental control of gain scheduling with similar transformation of control parameters to realize steady-state / transition state engine speed and temperature closed-loop control. The algorithm is implemented under Simulink environment Ground and altitude simulation verification. The results show that the control system also has the function of temperature protection in order to ensure the servo tracking performance of rotor speed.