Method for evaluating validity of estimated value of radar relative system error

Abstract

The invention belongs to the technical field of multi-radar data fusion, and particularly relates to a method for evaluating the validity of an estimated value of a radar relative system error. According to the method provided by the invention, a group of observation data of a typical route target by primary and secondary station radars is selected, after central unified rectangular coordinate conversion, linear parameter iterative estimation is performed on two radar observation track lines, a system error correction track line of the secondary station radar by using an unweighted linear track line parameter estimation model and a weighted linear track line parameter estimation model successively, and a validity index of the estimated value of a system error of a secondary station correction track line is constructed by calculating relative entropies with a primary station observation track line before and after the system error of a secondary station observation track line is corrected, so as to evaluate the validity and the correction effect of the estimated value of the system error. According to the method provided by the invention, the principle method is scientific, and theimplementation steps are reasonable. Compared with the traditional system error validity evaluation method, the complexity is simplified while improving the accuracy and the operability, and the engineering implementation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of multi-radar data fusion, and in particular relates to a method for evaluating the effectiveness of radar relative system error estimation. Background technique [0002] The radar relative system error refers to the fixed error relative to the designated reference system that exists when the radar measures the target, including the direction finding error Δθ, the ranging error Δρ, and the radar site calibration error (Δx, Δy) in the radar dynamic measurement. And the coordinate transformation error existing in the application of radar networking, etc. In the radar network observation, the absolute position of the dynamic target is unknown in most cases, and it is relatively easy to obtain the discrete observation values ​​of the same flying target by different radars in the same time period. Compared with other radars in the network, there will always be a radar whose observations are accurate. At this ti...

AI Technical Summary

Problems solved by technology

This method is relatively scientific in principle, but in terms of engineering implementation, due to the asynchronous operation of the radar, "multiple time registration points" hardly exist in the original measurement, although methods such as Kalman filtering can be used to extrapolate the target at the desired moment position points, but the extrapolation process inevitably introduces new calculation errors, so the operability and accuracy of the point evaluation method are not high

Images