Minimum drag optimal guidance with final flight path angle constraint against re-entry targets

Kumar, P and Bhattacharyya, A and Padhi, R (2018) Minimum drag optimal guidance with final flight path angle constraint against re-entry targets. In: AIAA Guidance, Navigation, and Control Conference, 2018, 8–12 January 2018, Kissimmee, Florida.

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Abstract

To increase the effectiveness of interceptor against high speed re-entry target, it requires a direct hit in the desired direction with maximum interception velocity. The requirement of desired direction of hit, appears as a constraint on the final ight path and heading angle; while maximizing the impact velocity requires minimization of the total drag on the trajectory. In this paper, a new guidance formulation to minimize the trajectory drag loss with desired fight path and heading angle constraint has been proposed. The trajectory drag has two components one due to profile drag and another due to induced drag. The profile drag is a function of dynamic pressure and it is purely a function of states only, where as induced drag appears as a weighted quadratic expression in terms of guidance demands. The cost function in the proposed guidance formulation has two components, first term is purely a state dependent term, while second term is a weighted quadratic cost in the control input. The proposed guidance has been validated with a point mass interceptor and re-entry target engagement model. Performance of the proposed guidance has been compared with the optimal guidance solution and simulation results show that the new guidance logic is near optimal and it intercepts the target with maximum velocity.

Item Type:	Conference Paper
Publication:	AIAA Guidance, Navigation, and Control Conference, 2018
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to the American Institute of Aeronautics and Astronautics Inc, AIAA.
Keywords:	Aviation; Cost functions; Flight paths; Navigation, Dynamic pressures; Flight path angle; Impact velocities; Maximum velocity; Optimal guidance; Quadratic costs; State-dependent; Target engagements, Drag reduction
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	22 Aug 2022 04:56
Last Modified:	22 Aug 2022 04:56
URI:	https://eprints.iisc.ac.in/id/eprint/76097

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