An optical-mechanical integrated analysis method for micro-vibration of a spatial optical remote sensor

Abstract

The invention relates to an optical-mechanical integrated analysis method for micro-vibration of a spatial optical remote sensor, and belongs to the technical field of spatial optical remote sensing.The method includes: using finite element analysis softwareto carry out structure parameter analysis on an optical structure in a space optical remote sensor and establish a finite element model; obtaining modal information of the optical system from finite element analysis; Extracting modal information, converting the extracted modal information into linear state space representation; transmitting the modal information after conversion processing to software for light tracing and optical path difference analysis; Afterwards, by means of modal scaling, the final wavefront difference is withintwo wavelengths; therefore, a sensitivity matrix C for associating the movement of the key node with the optical performance is derived; The micro-vibration characteristic is used as the input of an optical-mechanical system, and the wavefront difference can be obtained by using the obtained sensitivity matrix, so that the influence of micro-vibration on the imaging quality of the space optical remote sensor can be better and more efficiently analyzed based on the obtained sensitivity matrix and the wavefront difference.

Description

technical field [0001] The invention relates to the technical field of space optical remote sensing, in particular to an optical-mechanical integration analysis method for micro-vibration of a space optical remote sensor. Background technique [0002] With the advancement of science and technology and the development of the times, the precision requirements for space optical remote sensors are getting higher and higher. The space optical remote sensor is inevitably affected by the micro-vibration generated by the reaction wheel during the working process. The micro-vibration disturbance will directly affect the pointing stability and pointing accuracy of the high-precision spacecraft platform, resulting in blurred imaging or serious distortion. , this continuous disturbance has a great impact on the wavefront difference of the imaging system, resulting in a decrease in the optical transfer function MTF, so the study of micro-vibrations in space optical remote sensing is part...

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Problems solved by technology

[0003] Based on this, it is necessary to provide an optical-mechanical integration analysis method for the micro-vibration of space optical remote sensors in order to solve the problem that the analysis efficiency of micro-vibrations on the optical system of space optical remote sensors is low and the effect is not significant.

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