Full-strapdown imaging guide head and missile body assembly error calibration method

Abstract

The invention discloses a full-strapdown imaging guide head and missile body assembly error calibration method. The method utilizes missile body postures and parallel light ray imaging to complete calibration and can directly calibrate the pitch direction error, the yaw direction error and the rolling direction error between a full-strapdown imaging guide head and a missile body through a six-steperror calibration method. According to the full-strapdown imaging guide head and missile body assembly error calibration method, the attitude information output by a missile-borne inertial measurement device is fully utilized, different placement postures of the missile body are matched with the imaging position of the parallel light rays in the image, and the information such as the inner parameters and the optical axis points in an imaging system are fused to complete the error calibration, so that the method has important significance for ensuring the hit precision of the full-strapdown imaging homing missile and meanwhile has great promotion significance for low-cost and large-scale production of the full-strapdown imaging homing missile.

Description

technical field [0001] The invention belongs to the field of detection of all-strapdown imaging-guided munitions, and specifically relates to how to simply and quickly calibrate the assembly error of a full-strapdown imaging-guided munition body and a seeker. Background technique [0002] The imaging detector of the all-strapdown imaging seeker is generally fixed to the reference base, and it is impossible to directly measure the rotational angular velocity of the target line of sight relative to the inertial space. The angular velocity of the line of sight can only be calculated through a digital platform. The line-of-sight angular velocity output by the head is coupled with the assembly error between the seeker head and the missile body, which includes structural errors, optical system adjustment errors, etc. In the space coordinate system, the above errors can be described as the full strapdown imaging seeker imaging coordinate system OX′Y′Z′ and the projectile coordinate...

AI Technical Summary

Problems solved by technology

[0010] However, there is currently no method that can accurately calibrate this error. Therefore, it is necessary to study a method that can easily and quickly calibrate the assembly error of the full strapdown imaging seeker and the missile body

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