基于保护映射理论的航空发动机增益调度控制

摘要

针对具有强非线性特性的航空发动机控制问题,提出将基于保护映射理论的控制方法用于航空发动机控制系统设计中.首先,基于某型涡扇发动机非线性模型建立线性变参数 LPV(linear parameter varying)模型.然后,采用基于保护映射理论的控制方法设计调度参数变化范围内的增益调度控制器,在设计过程中,只需通过任意给定的初始控制器参数就可以自动得到满足性能要求的控制器参数集合,避免了在多个平衡点进行控制器设计.最后,以非线性模型为被控对象,在飞行包线内的不同工作点进行仿真验证,结果表明,基于保护映射理论的控制方法在解决航空发动机控制系统的非线性问题时具有显著的效果.%A control method based on the guardian maps theory is proposed to solve the highly nonlin-ear aeroengine control problem.Firstly,linear parameter varying (LPV)model was established according to the nonlinear model of a turbofan engine.Then,based on the guardian maps theory control method,the gain scheduling controller was designed for the LPV model in the range of the scheduling parameter.In the process of design,a set of controller parameters which met the performance requirements was automatical-ly generated by a given arbitrary initial controller parameter,so designing the controller at lots of balanced points was avoided.Finally,the controller was applied to the nonlinear model.Simulations were per-formed at different points in the flight envelope.The simulation results show that the control method based on guardian maps theory has a significant effect on solving the nonlinear problems of aeroengine con-trol system.