推进系统优化控制模式研究

在不同的飞行任务段采用不同的优化控制模式,能够充分发挥发动机的性能潜力,提高飞机性能。利用机载自适应模型,使优化控制模式具有自适应能力。优化过程采用线性规划(LP)方法结合发动机的物理响应过程来解决非线性的发动机性能优化问题。文中阐述了优化控制的设计和控制算法,并进行了数字仿真试验,结果表明:在平飞加速工况下,采用最大推力模式,可提高发动机推力约10%;在亚音速巡航时,采用最小油耗模式,可节省单位油耗约2%,验证了推进系统优化控制模式的性能效益。

A Study of Propulsion Optimization Control Modes

Propulsion optimization control modes compute a set of trim commands to the Digital Electronic Engine Controller by Linear Programming,this approach results in significant performance improvements of aero-engine.Adaptive engine model is applied in order to accommodate the off-nominal effects and engine-to-engine variations.The structure of the optimization control system is designed and control algorithm is developed.Digital simulations are conducted with two optimization modes:maximum thrust mode and minimum fuel consumption mode.Simulation results presented here demonstrate that during accelerating flight at constant altitude thrust increases up to approximately 10 percent in the maximum thrust mode,and at subsonic cruise specific fuel consumption decreases up to 2 percent in the minimum fuel consumption mode.