基于高速慢车的航空发动机快速响应控制

Fast Response Control of Aircraft Engine Through

关键词:  涡扇发动机  快速响应控制  高速慢车  VSV调节计划  加速计划

Key words:  Turbofan engines  Fast response control  High speed idle  VSV control schedule  Accelerate schedule

摘要:

针对传统航空发动机响应速度慢，难以在紧急事件中用于控制受损飞机完成起降过程的问题，采用高速慢车控制模式来提升发动机加速性能，通过增加发动机在慢车时高压压气机转速，为加速前期提供更大的燃油流量，从而缩短发动机从慢车至最大状态的加速时间。为保证慢车时高压转子转速提高的同时发动机推力和稳定裕度不变，通过修改高压压气机可调导叶控制计划来调整高压转子工作点。仿真结果显示，与原有控制相比，采用高速慢车快速响应控制模式的发动机加速上升时间从原来的2.00s缩短至1.86s，而高压压气机最小喘振裕度仅由16.01%下降至14.81%，同时慢车推力基本保持不变。

Abstract:

The traditional aero-engine response is sluggish and difficult to be used to land a damaged aircraft in some emergency situations. To solve this problem，High Speed Idle (HSI) is introduced to enhance the acceleration performance. By increasing high pressure rotor speed，it can provide greater fuel flow for acceleration process to shorten rise time between the idle to largest state. And in order to ensure the engine thrust and stability margin unchanged while increasing high pressure rotor speed，the Variable Stator Vanes (VSV) control schedule is modified to change the operating point of high pressure rotor. Simulation results show that the rise time reduced to be 1.86s from 2.00s，and at the same time the stability margin of core compressor only decreases to be 14.81% from 16.01%，while the thrust of engine in idle state unchanged.