A radar beam decoupling method for a moving platform

Abstract

The invention discloses a radar beam decoupling method of a moving platform, which comprises the following steps: Step 1. Acquiring three attitude angles of the moving platform under initial conditions under inertial coordinates: pitch angle θ, yaw angle ψ, and roll angle γ; Step 2. Calculate the Euler rotation matrix C of the initial motion platform in the inertial coordinate system, and convert the Euler rotation matrix C into a quaternion; Step 3. Solve the new quaternion formed by the rotation of the carrier at the next moment Vector Q 1 ; Step 4, from the updated quaternion vector Q 1 Compute the new Euler rotation matrix C 1 ; Step 5, using the new Euler rotation matrix C 1 Calculate the updated beam azimuth α 1 , pitch angle β 1 . Due to the adoption of the above solution, compared with the prior art, the present invention simplifies the calculation steps, reduces the calculation amount, and can realize fast decoupling.

Description

technical field

[0001] The invention relates to radar beam decoupling technology, in particular to a radar beam decoupling method under a moving platform. Background technique

[0002] Radar systems (such as pulse Doppler radar for detecting low-slow and small targets and synthetic aperture radar for imaging) are not affected by weather conditions and can detect targets all-weather and all-weather, and are widely used in military and civilian fields. In particular, radar application platforms, such as airborne, spaceborne, and vehicle-mounted platforms, are becoming more and more abundant. Under these moving platforms, due to the turbulence and vibration of the carrier, the beam pointing of the radar will change, which will cause the performance index of the radar to decline and affect the normal use of the radar.

[0003] The purpose of radar beam decoupling is to ensure that the beam pointing of the radar under the moving platform does not change with the bumps and jitter...

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