Decoupling-based phased array antenna stability angle tracking method

Abstract

The invention discloses a decoupling-based phased array antenna stability angle tracking method which comprises: interrupting periodically decoupling to generate first moment missile body attitude data to obtain a conversion matrix from an inertial rectangular coordinate system to a missile body rectangular coordinate system; performing coordinate conversion from inertial coordinates to antenna array surface rectangular coordinates; calculating beam pointing azimuth angle and pitching angle according to the antenna array surface coordinates, and controlling the antenna beam pointing direction;compensating a single-pulse angle measurement angle error generated by periodical angle measurement interruption to antenna array surface direction cosine coordinates;completely carrying out coordinate inverse transformation on compensated antenna array surface direction cosine coordinates to obtain the inertial coordinates; interrupting decoupling to generate n (n>1) moment missile body posturedata to obtain a conversion matrix and an inverse rotation matrix from inertial rectangular coordinates to missile body rectangular coordinates; and calculating the beam pointing azimuth angle and pitching angle, and controlling the antenna beam pointing direction. According to the method, the problem that by use of the existing decoupling-based phased array antenna stability angle tracking method,the tracking angle measurement precision is difficult to meet under the condition that violent attitude disturbance exists in a missile body is solved.

Description

technical field [0001] The invention relates to the field of phased array radar, in particular to a decoupling-based phased array antenna stabilization angle tracking method. Background technique [0002] The existing phased array radar system tracks the target by measuring the distance, angle, speed, power and other target characteristic parameters of the target. After data acquisition and data processing, the associated target track information is formed, and the target track information is filtered. , smoothing, prediction and other operations to further obtain the motion parameters of the target. The existing phased array radar usually adopts the single-pulse angle measurement method to measure the target angle. The single-pulse angle measurement method obtains the target angular position information by comparing the signals from two or more simultaneous beams, and can accurately obtain the target position. Angular position information, and post-processing algorithms su...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a phased array antenna stabilization angle tracking method based on decoupling, and solve the problem that it is difficult to meet the tracking angle measurement accuracy under the condition of severe attitude disturbance of the projectile

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