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Calibration algorithm and storage medium of six-degree-of-freedom precision adjustment mechanism for space camera secondary mirror

A technology of precise adjustment and machine mirror, applied in the direction of self-adaptive control, control/adjustment system, instrument, etc., can solve the problems such as the accuracy can not meet the requirements, the calibration is difficult to achieve, etc.

Active Publication Date: 2021-01-15
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] For this reason, it is necessary to provide a calibration algorithm for the six-degree-of-freedom precision adjustment mechanism of the secondary mirror of the space camera, so as to solve the problems of the current secondary mirror adjustment mechanism, such as the difficulty in calibration and the accuracy that cannot meet the requirements.

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  • Calibration algorithm and storage medium of six-degree-of-freedom precision adjustment mechanism for space camera secondary mirror
  • Calibration algorithm and storage medium of six-degree-of-freedom precision adjustment mechanism for space camera secondary mirror
  • Calibration algorithm and storage medium of six-degree-of-freedom precision adjustment mechanism for space camera secondary mirror

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[0038] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0039] see figure 1 , is a flowchart of the calibration algorithm of the six-degree-of-freedom precision adjustment mechanism for the secondary mirror of the space camera related to an embodiment of the present invention. The calibration algorithm includes the following steps:

[0040] First enter step S101 to establish a positive and negative solution model according to the structural characteristic parameters of the secondary mirror adjustment mechanism. The model parameters adopt the theoretical values ​​given in the process of manufacturing and tooling, and verify the correctness of the inverse solution model through the forward solution model of the regulating mechanism. Structural feature parameters refer to the kinematic prop...

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Abstract

The invention discloses a calibration algorithm and a storage medium of a six-degree-of-freedom precision adjustment mechanism for a secondary mirror of a space camera. A model is established based on the inverse theory of kinematics, and an equation group is established according to the model and multiple sets of measurement data, and the equation group is optimized. Solve to achieve the purpose of calibration. The algorithm of the present invention is based on an external calibration method, and can calibrate the six-degree-of-freedom precision adjustment mechanism of the secondary mirror of the space camera, thereby improving the absolute positioning accuracy of the adjustment mechanism. The invention has the characteristics of high calibration precision, fast convergence speed, easy realization and the like, and can simultaneously ensure the global optimization capability and local convergence precision of the calibration process.

Description

technical field [0001] The invention relates to the field of combining a space robot and a space camera, in particular to a calibration algorithm and a storage medium for a six-degree-of-freedom precision adjustment mechanism of a space camera secondary mirror. Background technique [0002] In a space optical telescope, the relative pose of the primary reflector and the secondary reflector has a significant impact on the imaging quality of the space target, and the uncertainty of the working environment and the vibration caused by the launch process of the launch vehicle require the space camera to have on-orbit active The ability to adjust optically. The mass and volume of the primary mirror are relatively large, so in the actual application process, the secondary mirror is generally installed on a mechanism whose position and attitude can be adjusted in six degrees of freedom, so as to achieve the purpose of adjusting the relative posture of the primary and secondary mirro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 曹小涛王瀚赵伟国杨维帆
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI