基于假设温度的大型客机减推起飞方法研究

Research on Reduced Thrust Take-off of Large Passenger Aircraft Based on Assumed Temperature

在分析减推起飞原理的基础上,对减推起飞的过程和限制进行了详细分析,研究了涡轮发动机的温度特性以及起飞时温度对推力的影响,绘制了某大型客机的机场高度、温度与推力关系图。为研究假设温度减推起飞对燃油消耗以及起飞性能的影响,提出对双轴涡扇发动机采用最优伺服控制器设计其控制律。在MATLAB/SIMULINK上建立了仿真模型,对所设计的纵向假设温度减推起飞控制律进行仿真,并给出飞机的状态曲线。结果表明,假设温度减推起飞在降低燃油消耗方面有良好的效果,并有效降低航空公司的运行成本。

Based on analyzing the principle of reduced thrust,process and limitation of reduced thrust were studied,and temperature characteristics of turbine engine and influence of temperature to thrust was researched,and the plot of height,temperature versus thrust of a commercial aircraft was drawn.In order to research Assumed Temperature and its influence on fuel consumption and take-off performance,the control law based on optimal servo for turbine engine was designed.Furthermore,the system model was built in virtue of MATLAB/SIMULINK toolbox,the vertical control law of Assumed Temperature Method was simulated,and the simulation curves were offered.Results show that the Assumed Temperature earns big benefits from reducing fuel consumption and reduces operating costs of airline effectively.