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Trajectory-following guidance based on a virtual target and an angle constraint

机译：基于虚拟目标和角度约束的轨迹之后的指导

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摘要

In this paper, a new trajectory-following guidance scheme based on the combination of the virtual target concept and a missile terminal guidance law is proposed. A line-of-sight (LOS) angle constraint is derived for the unmanned aerial vehicle (UAV) to track a virtual target moving along the reference trajectory, by which the trajectory-following problem is transformed into an angle-constrained terminal guidance problem such that well-developed terminal guidance laws can be incorporated into the design of a trajectory-following guidance scheme. The nonsingular sliding mode technique is employed to control the vehicle's LOS angle to converge to its desired value and thus to tightly track the reference trajectory. In addition, the finite-time trajectory-following position error convergence of the proposed guidance scheme is presented. The significant contribution of this paper lies in the fact that a LOS angle constraint has been presented for a virtual-target-based trajectory-following scheme, greatly enhancing the flexibility of the design of the trajectory-following guidance scheme. Numerical simulations are performed to demonstrate the performance of the proposed guidance law and its superiority over existing trajectory-following guidance laws. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：本文提出了一种基于虚拟目标概念和导弹终端指导法的组合的新轨迹之后的指导方案。为无人驾驶飞行器（UAV）导出了一种视线（LOS）角度约束，以跟踪沿着参考轨迹移动的虚拟目标，通过该轨迹轨迹之后的问题被转换为角度约束的终端引导问题该终端指导法律可以纳入轨迹之后的指导方案的设计中。采用非界面滑动模式技术来控制车辆的液位以收敛到其期望值，从而紧紧跟踪参考轨迹。此外，提出了所提出的指导方案的有限时间轨迹之后的位置误差收敛。本文的重大贡献在于延长了基于目标的轨迹的轨迹的轨迹约束，大大提高了轨迹之后的指导方案的设计的灵活性。执行数值模拟以证明拟议的指导法的表现及其在现有轨迹之后的指导法中的优势。 （c）2019年Elsevier Masson SAS。版权所有。

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