基于LPV模型参考自适应飞行边界保护控制

进行有效的飞行边界保护控制有利于预防飞行失控。研究了一种基于线性参数变化(Linear parameter varing,LPV)模型参考自适应飞行边界保护控制方法。基于函数替换方法构建了仿射参数依赖LPV飞行动力学模型,通过调度变量的动态变化来减小与全量非线性动力学模型的失配。将实时飞行边界保护转为有约束广义预测控制问题,设计了数值算法以实现对舵偏角控制量及其增量、飞行状态参数的边界保护。通过仿真分析表明,LPV模型能够较好地逼近全量模型,反映出瞬时飞行动态;通过有约束广义预测控制数值算法能够有效地实现飞行边界的保护控制。

Flight Boundary Protection Based on LPV Model Reference Adaptive Control

Effective flight boundary control will be helpful to prevent loss-of-control in flight. A model reference adaptive control method based on linear parameter varying (LPV) model is studied for flight boundary protection. An affine parameter dependent LPV flight dynamics model (FDM) is built up by function substitution method. The mismatch between LPV and full-quality nonlinear FDM can be decreased with the variation of scheduling parameters. The problem of real-time flight boundary protection can be solved by constrained generalized predictive control. Furthermore, a numerical algorithm is designed to protect the boundary of control surface deflection and its increments, flight states, etc. The simulation results show that the instantaneous dynamics response of LPV model can approximate that of nonlinear FDM. Flight boundary protection can be implemented effectively by constrained predictive control numerical algorithm.