Triangulation-based LOS Rate Estimation for Two-player Missile Team

초록

The line-of-sight (LOS) rate information between an interceptor and its target stands as a critical factor in numerous guidance methodologies, prompting the development of several sophisticated estimation techniques. Meanwhile, recent studies have extensively delved into cooperative guidance strategies facilitated by information exchange. However, LOS rate estimation methods reliant on Kalman filters necessitate target distance, rendering them impractical for missiles equipped with passive seekers. Furthermore, the precision of information sharing is hindered by discrepancies in coordinate frames delineated for individual interceptors. This paper introduces an LOS rate estimation algorithm tailored for a team of interceptors employing passive seekers, arranged in a salvo engagement configuration. The proposed algorithm integrates a Kalman filter and triangulation-based relative distance estimation. It is designed to refine the Kalman filter estimate by incorporating relative distance data derived from triangulation, while concurrently utilizing the estimated LOS angle error to enhance the precision of relative distance information via triangulation. A series of numerical simulations were conducted to validate the performance of the proposed algorithm. Results demonstrate enhanced interception accuracy and improved statistical properties of LOS angle and rate estimates when information sharing mechanisms are implemented.

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