Line-of-Sight Rate Estimation for Barrel-Roll Maneuvering Target Tracking

Abstract

Line-of-sight (LOS) rate is necessary for implementing of popular guidance laws on a guided missile with an infrared strapdown seeker. Since LOS rate cannot be measured by infrared strapdown seekers directly, it is usually estimated from some other measurable quantities based on the dynamic model of LOS rate. Hence, an accurate dynamic model of LOS rate is important. Existing models do not consider target maneuvers. A method to construct dynamic models of the LOS rate for maneuvering target tracking are proposed. Following this method, a continuous-time LOS rate model for barrel-roll maneuvering target tracking is derived. Under some assumptions, the corresponding discrete-time model is derived. To evaluate what is proposed, simulation results of two scenarios for barrel-roll maneuvering target tracking are also presented. The results illustrate the effectiveness of the proposed models and approach.