多耦合作用下的飞行器动力学综合解耦方法研究

Research on Comprehensive Decoupling Method for Aircraft Dynamics Under Multi-coupling

高超声速飞行器采用面对称布局、BTT飞行控制及机体/发动机一体化设计,使得飞行器各通道间耦合作用明显,经典控制理论无法直接使用。文中提出了一种综合解耦方法,该方法定义了度量各种耦合影响大小的评价指标,对耦合项进行等效变换或忽略,实现了对飞行器动力学模型的解耦,有利于经典控制理论和评价方法解决高超声速飞行器的控制问题。通过数字仿真,证明了解耦方法是合理有效的,对不确定性因素也有良好的鲁棒性。

Since the hypersonic aircraft adopts plane-symmetry configuration,BTT flight control and airframe-engine integration design,the three channels couple obviously,resulting in ineffective of classical control theory.This paper proposes a comprehensive decoupling method.The method defines an evaluation index of coupling influence.The coupling factors can be equivalently transformed or ignored and dynamic model of aircraft is decoupled Therefore it is helpful for using classical control theory and evaluation method to solve the control problem of hypersonic aircraft.By digital simulation,the decoupling method is proven effective and has good robustness for uncertainties as well.