Singular-perturbation-based guidance of pulse motor interceptors with look angle constraints

Annam, C and Ratnoo, A and Ghose, D (2021) Singular-perturbation-based guidance of pulse motor interceptors with look angle constraints. In: Journal of Guidance, Control, and Dynamics, 44 (7). pp. 1356-1370.

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Abstract

This paper addresses the problem of midcourse guidance of dual-pulse rocket motor interceptors with seeker fieldof-view constraints using singular perturbation technique. The guidance law considers a combination of terminal velocity and flight time as a performance measure. In addition to the seeker field-of-view limit, constraints in the optimization problem include minimum dynamic pressure limit arising due to aerodynamic controllability. Using the time scale separation between the state variables, the full-order problem is reduced into lower-order subproblems, and a closed-form solution for guidance law is derived. It is shown that the performance of the interceptor is not very sensitive to perturbation of pulse firing time, and an offline generated lookup table is used to time the second thrust pulse firing. The proposed guidance law is computationally efficient, and its performance is benchmarked with that of pseudospectral-based feedback guidance with much lower computational cost. Simulation studies with point mass and six-degree-of-freedom model are presented highlighting the accuracy and efficacy of the proposed guidance law. © 2021 by Chandrakanth Annam, Ashwini Ratnoo, and Debasish Ghose.

Item Type:	Journal Article
Publication:	Journal of Guidance, Control, and Dynamics
Publisher:	AIAA International
Additional Information:	The copyright for this article belongs to AIAA International.
Keywords:	Degrees of freedom (mechanics); Perturbation techniques, Angle constraint; Dual-pulses; Field of views; Flight time; Guidance laws; Midcourse guidance; Performance; Singular perturbation technique; Singular perturbations; Terminal velocity, Table lookup
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	09 Mar 2023 06:32
Last Modified:	09 Mar 2023 06:32
URI:	https://eprints.iisc.ac.in/id/eprint/80884

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