BTT导弹非线性自动驾驶仪最优滑模设计

Design of Optimal-Sliding Mode Nonlinear Autopilot for BTT Missile

针对BTT导弹的飞行控制问题,提出了一种基于θ-D方法的最优滑模非线性自动驾驶仪设计方法。把导弹动态模型转化成一个级联的二回路系统结构,外环控制器的设计是基于θ-D近似方法的最优控制方法,内环控制器设计采用的是滑模控制方法,内环控制器所跟随的滑模面方程由外环最优控制得出。对所设计的非线性控制器进行了仿真分析,结果表明基于θ-D方法的最优滑模自动驾驶仪在非线性导弹飞行控制中具有较高的控制精度和很好的鲁棒性。

Aiming at Bank-To-Turn （BTT） missile flight control problem, a θ-D scheme based optimal sliding mode controller design method for a nonlinear autopilot was developed. The dynamic of missile was transformed to a ＂cascade＂ or two-loop structure, the outer loop was designed using a θ - D method based optimal controller. This outer loop controller generates an optimal sliding surface which is followed by a sliding mode controller in the inner loop. Simulation and analysis was performed for the nonlinear control system. Results demonstrate that the designed autopilot is provided with higher precision and better robustness in the entire missile flight envelope.