ABSTRACT

In this paper, a novel adaptive three-dimensional finite-time guidance law is proposed to achieve the interception of maneuvering targets. The proposed guidance law considers terminal angle constraints and the coupled nonlinear dynamics of the three-dimensional missile-target interception scenario. Adaptive control technique and sliding mode control theory are applied to design the guidance law. More specifically, the designed adaptive law can ensure sliding mode manifold fast reach a predefined region and weaken the chattering phenomenon without the upper bounds of target maneuvers. Furthermore, the line-of-sight angle tracking errors and the line-of-sight angular rates can achieve finite-time convergence via the designed nonsingular fast terminal sliding mode controller. Therefore, the accurate interception of the missile against maneuvering targets can be achieved via the proposed guidance law. Numerical simulations show the effectiveness and superiority of the proposed guidance law.

摘要

本文提出了一种新的自适应三维有限时间制导律来实现机动目标的拦截。所提出的制导律考虑了终端角约束和三维导弹-目标拦截场景的耦合非线性动力学。采用自适应控制技术和滑模控制理论设计制导律。更具体地说，设计的自适应律可以确保滑模流形快速到达预定区域，并在没有目标机动上限的情况下削弱颤振现象。此外，通过设计的非奇异快速终端滑模控制器，视线角度跟踪误差和视线角速率可以实现有限时间收敛。所以，通过提出的制导律，可以实现导弹对机动目标的精确拦截。数值模拟表明了所提出的制导律的有效性和优越性。