Adaptive filtering method used for NSHV tracking filtering and adaptive filtering system thereof

Abstract

The invention discloses an adaptive filtering method used for NSHV tracking filtering and an adaptive filtering system thereof. According to the method, a dynamical model (state transition equation) based on the unknown attack angle and a radar measurement model (measurement equation) are established; and a recursion method based on the suboptimal unbiased noise statistical estimator is acquired.The method is used for near space hypersonic boost-glide aircraft tracking so that the filtering stability and the tracking accuracy can be effectively enhanced, the rate average tracking accuracy canbe enhanced for 50% than that of the Sage-Husa adaptive method, the rate average tracking accuracy can be enhanced for 6.77% than that of the Sage-Husa adaptive method, and the geocentric distance tracking accuracy within 100m and speed tracking within 6m / s can meet the defense requirements of the near space hypersonic glide aircraft.

Description

technical field [0001] The invention relates to the technical field of target tracking filtering, in particular to an adaptive filtering method and system for NSHV tracking filtering. Background technique [0002] A near space hypersonic vehicle (Near Space Hypersonic Vehicle, NSHV) is an aircraft that flies in the near space of 20km to 100km from the ground, and the flight speed is generally above 5Ma. The NSHV based on the concept of boost-glide ballistics has become one of the research hotspots at home and abroad. After the booster and initial ballistic flight stages, this type of aircraft obtains a certain speed and altitude, and relies on the aerodynamic shape with a high lift-to-drag ratio to achieve height in the adjacent space. Supersonic gliding flight. Due to its fast flight speed and strong maneuverability, NSHV can achieve precise strikes on global targets within two hours. For defense, the detection, tracking and threat assessment of such targets are very diff...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of large errors and easy divergence when using the traditional single-model tracking filtering method to track hypersonic boost-glide aircraft in adjacent space, the present invention provides an adaptive filtering method and system for NSHV tracking filtering, which can Avoid filtering divergence, greatly improve the numerical stability and filtering accuracy of NSHV tracking filtering

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