基于LADRC的RBCC高超声速飞行器轨迹跟踪

Trajectory Tracking for RBCC-Powered Hypersonic Vehicle Based on LADRC

为解决RBCC高超声速飞行器在不确定性强、制导控制量多且相互耦合情况下精确跟踪标称轨迹的难题,从易于工程应用角度出发,提出一种基于线性自抗扰控制的纵向轨迹跟踪制导方法。根据RBCC高超声速飞行器特点建立数学模型。在线性自抗扰控制基本原理的基础上,设计轨迹跟踪制导律。针对自抗扰控制中的Peaking现象,结合比例反馈制导,设计防Peaking制导切换策略。仿真结果表明,相较于传统比例反馈制导,在动态参数扰动和风干扰下,所提方法具有更精确的轨迹跟踪性能,对于各种内外不确定性具有更强的鲁棒性。

Trajectory tracking guidance for RBCC-powered hypersonic vehicle is studyed. In order to achieve the goal that RBCC-powered hypersonic vehicle can track the reference trajectory precisely in situations with strong uncertainty and multiple and coupled guidance control variables, this study, aimed at easy engineering application, proposes a method of longitudinal trajectory tracking based on linear active disturbance rejection control(LADRC). The mathematical model is established according to the characteristics of RBCC-powered hypersonic vehicle. On the basis of the basic principles of LADRC, a trajectory tracking guidance law is designed. Aiming at the Peaking phenomenon in active disturbance rejection control and combining with proportional feedback guidance, the study designs the anti Peaking guidance switching strategy. The simulation results show that compared with the traditional proportional feedback guidance, under the disturbance of dynamic parameters and wind, the proposed method has more accurate trajectory tracking performance and is more robust to various internal and external uncertainties.