摘要
在攻击无人机群协同攻击中,为了提高机群的整体突防能力,达到最佳的攻击和作战效能,有必要同时控制无人机的攻击角度和攻击时间。首先利用最优控制理论,在对飞行运动学模型进行线性化的前提下,通过加速度微分来实现对角度和时间的同时控制。但是,当终端入射角较大时,由于线性化假设不再成立,使得控制精度比较差。针对这一问题,利用具有高反馈效率的非线性误差反馈,把由于线性化引起的误差通过补偿反馈到系统回路中去,从而大幅度提高了控制精度。数值仿真结果验证了方法的有效性。
In order to improve the penetration ability and obtain the optimal attack efficiency, it is necessary to apply cooperative salvo attack for the unmanned aerial vehicle （UAV）. Therefore, it is important to control both impact time and impact angle for flight vehicle＇s homing problem simultaneously. In the framework of op- timal control, the flight motion equations are linearized to control both impact time and impact angle by jerk. The proposed law can lead UAV to home on a target at a designated impact time with a prescribed impact angle. However, it has poor control precision when the terminal impact angle is large because the linear assumptions are inaccurate. To solve this problem, this paper presents an optimal solution based on nonlinear error feedback compensation. By high efficient nonlinear feedback, the linearized error terms are compensated to the linear system to improve the control precision. Numerical simulations demonstrate the better performance of the proposed law in the accuracies of both impact angle and impact time.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2008年第B05期33-38,共6页
Acta Aeronautica et Astronautica Sinica
基金
国家"863"计划(2006AA705319)
