变几何涡扇发动机加速控制规律优化设计

OPTIMAL DESIGN OF ACCELERATING CONTROL LAW FOR VARIABLE GEOMETRY TURBOFAN ENGINE

首先建立了一种变几何通道涡扇发动机数学模型，该模型中，风扇及压气机在不同进口导流叶片角度下的特性是通过对基准特性的修正而获得的。然后根据变几何涡扇发动机的特点，利用非线性规划中的约束变尺度法（ＣＶＭ）设计了最优加速规律。研究结果表明：用约束变尺度法优化设计出的发动机加速控制规律，可以保证发动机在全飞行包线范围内稳定工作，且加速时间最短。

A mathematical model of a variable geometry turbofan engine was established.In the model,the performances of the fan and compressor at different inlet guide vane angles were obtained by revising basic performances.Then according to the features of the variable geometry turbofan engine,the optimal accelerating law was designed by use of the CVM etric Method(CVM)of nonlinear programming.The study result shows that the accelerating control law obtained by use of the Constrained Variable Metric Method ensures engine operating steadily throughout full flight envelope in minimum accelerating time.