Calibration device and calibration method for alignment of guidance radar mechanical axis and electrical axis

Abstract

A calibration device and a calibration method for aligning the mechanical axis with the electric axis of guidance radar are provided. The invention discloses a calibration device for aligning the mechanical axis with the electric axis of missile guidance radar and a calibration method using the calibration device. The projection of the missile mechanical axis on the zero position of a calibrationsphere is realized through the linear extension of the optical axis. The orientation of a target installed on the zero position is captured through guidance radar, so as to complete the calibration ofthe zero position of the electric axis. The upper and lower threshold measurement values are acquired by moving the target up and down, and thus, the calibration of alignment between the mechanical axis and the electric axis of the missile guidance radar is completed. The influence of system errors such as missile structure deformation and guidance radar installation size deviation on the alignment accuracy of the zero position of the mechanical axis and the zero position of the electric axis is overcome, and the calibration and adjustment of upper and lower threshold values of guidance radaris realized.

Description

technical field [0001] The invention relates to the technical field of radar guidance, in particular to a calibration device and a calibration method for aligning a mechanical axis and an electrical axis of a guidance radar. Background technique [0002] Mechanical parts and electrical parts will have zero drift. For precision equipment, it is necessary to align the mechanical axis with the electrical axis. Alignment calibration at home and abroad is usually to calibrate the mechanical zero position and electrical zero position separately. If there is an installation error or structural deformation in the product assembly, it is difficult to eliminate the error by mechanical zero position calibration and electrical zero position calibration, which will affect to the alignment accuracy of the mechanical and electrical axes in the system. After the existing guidance radar is installed on the missile, only the zero position of the electrical axis of the guidance radar and the ...

AI Technical Summary

Problems solved by technology

Alignment calibration at home and abroad is usually to calibrate the mechanical zero position and electrical zero position separately. If there is an installation error or structural deformation in the product assembly, it is difficult to eliminate the error by mechanical zero position calibration and electrical zero position calibration, which will affect Alignment accuracy of mechanical and electrical axes in the system

After the existing guidance radar is installed on the missile, only the zero position of the electrical axis of the guidance radar and the zero position of the mechanical axis of the missile are calibrated separately. Due to the inevitable system errors such as structural deformation and dimensional deviation during the production and assembly of the missile, the calibrated electrical axis The zero position of the axis and the zero position of the mechanical axis of the missile may not be precisely aligned. For a device such as a guided radar that detects targets tens of kilometers away, there will be a large deviation between the captured target position and the actual target position

In addition, when the guidance radar captures a distant target, there will be a circular deviation in the detection. This deviation should be smaller than the threshold value. The alignment accuracy of the threshold value and the electrical axis and mechanical axis will directly affect the interception and tracking of the target by the missile. ability

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