Benchmark Study for Performance Impact of Seeker-Radome on Guidance Loop. Issue 22 (2022)

• Record Type: Journal Article
• Authors: Tripathi, Srijan; Maity, Arnab; Kumar, Shashi Ranjan
• Is Part Of: IFAC-PapersOnLine. Volume 55:Issue 22(2022)
• Page Start: 424
• Page End: 429
• Publication Date: 2022
• Subjects: Seeker -- Radome -- Guidance -- Bore-sight error -- Bore-sight error slope -- Terminal phase trajectory -- compensation scheme; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2023.03.071
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: The primary objective of guidance is to achieve desired miss distance with minimum control effort considering all possible path constraints. In-case of tactical interceptors, guidance plays a critical role in steering the interceptor towards target even though target tries to maneuver and escape. Trajectory of interceptor is divided in three phases as boost, mid-course and terminal phase from guidance point of view. Terminal phase of guidance, which is most critical for neutralization of target, uses on-board seeker as a primary target sensor for guidance. Seeker based terminal guidance brings additional constraints (such as accuracies, radome shapes, radome induced errors, radome error slope etc) in terms of its own performance and specification. If constraints are not addressed properly, it may lead to mission-failure. This paper discussed about a radome error model, which is being developed for analysis of impact of radome induced bore-sight error and radome bore-sight error slope. A benchmark study has been carried out using this model to brought out the specification in terms of permissible values for these errors without affecting the performance of guidance loop. Compensation scheme has been evolved based on off-line analysis of data. Monte-Carlo simulation are used for the evaluation of radome performances and analysis of its impact on guidance loop of interceptors. Subsequently, specifications are brought out for compensation scheme.