微型发动机温度限制保护闭环控制设计方法

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。

Design Method of Close Loop Controller with Temperature Limitation Protection for Micro Gas Turbine Engines

In order to solve the problem that the turbine outlet temperature is sensitive to the change of fuel flow in the close-loop designed rotor speed control structure of micro gas turbine engines, especially pushing the throttle lever quickly, a method in designing the close-loop controller with turbine outlet temperature protection was presented. Dual circuit close-loop structure was adopted in this method. The gain-scheduled incremental PI control law with corrected control parameters was used. Set-point and transient close-loop control was realized in the rotor speed and temperature protection loop. The algorithm above was simulated in the standard sea level and high altitude environment in the Simulink platform. The result proves that the designed control system has the ability of rotor speed servo tracking and temperature protection at the same time