基于变结构导引律的UCAV自主轨迹控制

摘要

研究无人作战飞机的自主轨迹控制问题.在一定假设条件的基础上,推导出无人作战飞机的三自由度运动模型；将变结构控制理论运用于无人作战飞机的导引,推导出变结构导引律；在自主轨迹控制算法中,由变结构导引律根据期望轨迹点计算出状态的期望值,并将该期望值与由运动模型得到的状态实际值之间的误差来驱动控制,自主轨迹控制控制的过程就是这个误差收敛到零的过程；仿真结果表明该自主轨迹控制算法能够快速地使无人作战飞机达到预定的轨迹点,且控制过程中控制量的变化平稳,具有良好的效果.%The autonomous unmanned combat aircraft trajectory control problem is researched. On the basis of certain assumptions, the three degrees of freedom motion model of UCAV is derived. With using the variable structure control theory into the UCAV s guide, the variable structure guidance law is derived. In the autonomous trajectory control algorithm, the expectation value of state is given by variable structure guidance law. There will be a error between the expectation value and the value according to the motion model, which is used to drive control. The autonomous control of trajectory control process is the error converges to zero process; The simulation results show that the autonomous trajectory control algorithm designed in this paper can make the UCAV arrive the predetermined track points quickly, and the states vary smoothly in the control process.