Abstract
In this paper, the hit-to-kill strategy is introduced to solve the three-dimensional (3D) robust head-pursuit (HP) interception problem considering the line-of-sight (LOS) angle constraints. Firstly, a target based relative dynamic model is proposed to be the nominal model for designing the robust HP guidance laws, where the HP interception problem is formulated as a target passively chases after the interceptor missile. Secondly, the 3D retro-proportional navigation (RPN) guidance law is reinterpreted from the point of control theory, which forces the corresponding guidance system asymptotically stable. Meanwhile, the concept of nullifying the LOS angular rates is successfully introduced to solve the 3D robust HP guidance problem via the sliding mode control. Thirdly, the LOS angles constrained robust HP guidance law is proposed based on the nonsingular terminal sliding mode control. The stabilities of the presented guidance laws are analyzed via the Lyapunov approach. The simulation results are in agreement with the theoretical statements.
Highlights
INTRODUCTIONIt is a challenging task to intercept a high-speed target (such as a hypersonic glider) by an interceptor missile, especially when the missile’s velocity is inferior to that of the target
It is a challenging task to intercept a high-speed target by an interceptor missile, especially when the missile’s velocity is inferior to that of the target. One reason for this plight is that the traditional defense missile usually performs the head-on (HO) interception strategy, where the closing velocity is so huge that stringent requirements on the missile guidance system are imposed
In view of the relationship of the HP interception mode and the TC interception mode, the HP interception engagement is formulated as a target passively chases after the interceptor missile
Summary
It is a challenging task to intercept a high-speed target (such as a hypersonic glider) by an interceptor missile, especially when the missile’s velocity is inferior to that of the target. The hit-to-kill strategy has not been applied to the HP interception problem To this end, it is necessary to find new solutions for the robust HP guidance law design, so that a hypersonic maneuvering target can be intercepted within a finite time by a speed inferior interceptor missile. The concept of nullifying LOS angular rate may could be applied without losing generality In another word, the hit-to-kill strategy could be introduced to the HP interception problem. (3) Constrained HP guidance law accounting for LOS angles is firstly proposed based on the NTSM method, which shows another choice for solving the angle constrained robust HP guidance problem.
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