Micro-vibration integrated simulation analysis method of optical remote sensing camera

Abstract

The invention relates to a micro-vibration integrated simulation analysis method for an optical remote sensing camera. The method mainly comprises the steps of establishing an optical-mechanical integrated model, performing LOS rigid body inspection on the optical-mechanical integrated model, performing modal analysis in a free floating state, obtaining a transfer function by utilizing a state space method, and performing LOS value calculation by utilizing load input and the transfer function, wherein the LOS rigid body inspection is used for verifying the correctness of the establishment of the optical-mechanical integration model; modal analysis is to provide necessary frequency and vibration mode information for a state space method. According to the method, on one hand, the calculationefficiency of a simulation analysis method is very high, on the other hand, optical and mechanical subjects involved in the micro-vibration simulation process of the optical remote sensing camera areintegrated together, and compared with each single-subject idealized model, the coupling influence between different subjects can be comprehensively considered; the real working process of the methodis closer to the real working process of an optical remote sensing camera, and the LOS value obtained through simulation has stronger guiding significance for design of an optical system and evaluation of the imaging performance of the optical system.

Description

technical field [0001] The invention belongs to the field of integrated simulation of optical remote sensing cameras, and in particular relates to a microvibration integrated simulation analysis method of optical remote sensing cameras. Background technique [0002] With the increasing demand for astronomical observation and military and civilian earth observation, optical remote sensing cameras are developing in the direction of large aperture, large field of view and high image quality. In order to ensure that the imaging quality of the camera meets the requirements in the working state, it is necessary to consider the imaging performance of the optical system when the camera is subjected to complex spatial disturbances formed by the vibration source, and micro-vibration simulation analysis is a good means of evaluation and verification . [0003] Optical axis pointing stability (LOS) is an important aspect of optical system image quality evaluation, which directly reflec...

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Problems solved by technology

[0005] The present invention aims to solve the technical problem that the micro-vibration integration simulation analysis method in the prior art is not only low in calculation efficiency, but also requires fewer grids and nodes of the optical-mechanical integration model in terms of calculation amount, and provides an optical remote sensing camera. Micro-vibration integration simulation analysis method, which is based on the modal information of the optical-mechanical integration model, uses the state space method to obtain the transfer function, and then calculates the LOS value, which can more efficiently and accurately evaluate the optical remote sensing camera under various conditions. Imaging quality when the environment is disturbed

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