Document Type : Research Paper

Authors

shiraz university of technology

10.30699/jsst.2019.1157

Abstract

In this paper, the approach of discrete-time partial stabilization is employed to design a robust three-dimensional guidance law against maneuvering targets. In the partial stabilization method, the considered system is divided into two sub-systems which achieving to asymptotic stability is desirable only for the first one. One of the advantages of this paper is to design a discrete-time guidance law even with limitations and difficulties in discrete-time Lyapunov theorem. The Lyapunov function has been chosen based on the physics of the guidance problem (making the rate of line of sight (LOS) rotation close to zero). In this paper, it is shown that there is no possibility for asymptotic stabilization of the guidance problem in the case of maneuvering targets. Thus, it has been sufficed to limit the rotation rate of LOS to a small value which will guarantee the missile hit to the target in a short time. Simulations results show the appropriate performance of the proposed guidance law.

Keywords

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