再入飞行器横侧向耦合多变量姿态控制技术研究

Research on Horizontal-lateral Coupling Multivariable Attitude Control Technology of Reentry Vehicle

结合多变量控制理论和定量反馈理论(QFT),设计了飞行器的横侧向耦合多变量姿态控制系统。通过飞行器的飞行仿真表明,多变量控制系统可以在存在较大不确定性的情况下,确保对横侧向指令进行精确跟踪,具有较强的鲁棒性。针对高速再入飞行器的弱气动条件下偏航控制不理想的问题,充分利用飞行器的多变量特性,利用副翼对偏航的耦合影响,用以协调控制偏航通道的姿态角。仿真结果表明,该方法达到了优化偏航通道控制的目的。

Combined with multivariable control theory and QFT, the design of horizontal-lateral coupling attitude control system is proposed. The result of flight simulation shows that the attitude control system based on QFT has ensured that the tracking performance is accurate and robust when large changes of hypersonic vehicle parameters exist. Considering the situation that yaw control of reentry vehicle is not ideal because of the weak pneumatic condition, having made full use of aircraft of multivariable characteristics, the yaw control is coordinated with the help of the effects of aileron coupling. The simulation results show that the yaw channel control has been optimized.