改善箭机分离载机飞行品质的状态反馈器研究

Study on state feedback system to improve flight qualities of carrier aircraft during launch vehicle separation from aircraft

为了改善内装式运载火箭与载机分离过程载机的飞行品质,应用现代控制理论,以一组期望的闭环极点为设计目标,利用正比于状态变量的线性控制律,设计带有状态观测器的状态反馈系统。通过Bass-Gura法求解反馈增益,基于时域分析法数值模拟了带有状态反馈器飞机的飞行品质。仿真结果表明,长、短周期运动变为收敛的周期模态,飞行品质提高到1级标准,可见状态反馈器设计是一种改善箭机分离过程载机飞行品质的高效可行的方法。

In order to improve the flight qualities of carrier aircraft during launch vehicle separation,the state feedback system with state observer based on modern control theory was designed in order to get the expected close-loop apices,and linear control laws proportion to state variables were adopted.The feedback gain was calculated through the method called as Bass-Gura,and the time-domain method was applied to the simulation of long and short cycle modes.The results show that long and short cycle modes are both periodicity and convergence,and the flight quality satisfies grade one.Obviously the state feedback system is a very efficient and adapted method to improve flight qualities of aircraft.