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面向机动目标跟踪的无人机横侧向制导规律

DOI: 10.13700/j.bh.1001-5965.2013.0453, PP. 803-809

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Abstract:

现有的standoff跟踪制导方法在进行机动目标跟踪时不能同时满足响应速度和稳态精度的要求.对用于航路跟踪的参考点制导法(RPG,ReferencePointGuidance)进行改进,推导了无人机(UAV,UnmannedAerialVehicle)在跟踪机动目标时的横侧向制导规律.采用二阶非线性微分方程对UAV和目标相对距离的调节过程进行建模,在此基础上分析了改进后RPG的渐近稳定性.仿真结果表明,相比Lyapunov向量场(LVFG,LyapunovVectorFieldGuidance)和模型预测控制(MPC,Model-basedPredictiveControl)的制导方法,改进RPG的跟踪误差和时间乘以误差绝对值积分(ITAE,IntegratedTimeAbsoluteError)指标均优于LVFG和MPC.因此,所提制导规律能够对机动目标的运动进行有效补偿,并具有更快的响应速度、更高的稳态精度和较好的实时性.

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