Nonsingular Terminal Sliding Mode Guidance with Impact Angle Constraints

Kumar, Shashi Ranjan and Rao, Sachit and Ghose, Debasish (2014) Nonsingular Terminal Sliding Mode Guidance with Impact Angle Constraints. In: JOURNAL OF GUIDANCE CONTROL AND DYNAMICS, 37 (4). pp. 1114-1130.

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Abstract

Guidance laws based on a conventional sliding mode ensures only asymptotic convergence. However, convergence to the desired impact angle within a finite time is important in most practical guidance applications. These finite time convergent guidance laws suffer from singularity leading to control saturation. In this paper, guidance laws to intercept targets at a desired impact angle, from any initial heading angle, without exhibiting any singularity, are presented. The desired impact angle, which is defined in terms of a desired line-of-sight angle, is achieved in finite time by selecting the interceptor's lateral acceleration to enforce nonsingular terminal sliding mode on a switching surface designed using nonlinear engagement dynamics. Numerical simulation results are presented to validate the proposed guidance laws for different initial engagement geometries and impact angles. Although the guidance laws are designed for constant speed interceptors, its robustness against the time-varying speed of interceptors is also evaluated through extensive simulation results.

Item Type:	Journal Article
Publication:	JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
Publisher:	AMER INST AERONAUTICS ASTRONAUTICS
Additional Information:	Copyright for this article belongs to the AMER INST AERONAUTICS ASTRONAUTICS, 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	11 Aug 2014 04:42
Last Modified:	11 Aug 2014 04:42
URI:	http://eprints.iisc.ac.in/id/eprint/49537

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