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Solar tracking system posture adjustment method being able to prolong the solar measuring time of space instrument

A technology for sun tracking and extending space, applied in the field of solar space measurement, can solve the problem of wasting solar measurement opportunities, and achieve the effect of shortening the transition process and multi-sun measurement time

Inactive Publication Date: 2016-05-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

These commonly used sun tracking methods do not focus on the optimization of how to maximize the on-orbit measurement of solar time by aerospace instruments during the space flight of each orbit of the spacecraft, wasting several precious opportunities for solar measurement

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  • Solar tracking system posture adjustment method being able to prolong the solar measuring time of space instrument

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The sun tracking system used to align the main optical axis of the space solar survey instrument to the sun increases the measurement time of the sun by adjusting its own attitude parameters. The space sun tracking system involved here is a highly integrated two-degree-of-freedom sun tracking system, including two relatively independent subsystems, the yaw subsystem and the pitch subsystem. The space sun tracking system operates according to the principle of feedback control, and the operating environment is a sun-synchronous orbit.

[0019] Through the method based on image feedback, the sun tracking system can achieve a positioning accuracy of the center of the sun image point better than 0.01° in a large field of view. After the sun tracking system captures the sunlight, and under the premise that the signal status based on the image feedback is no...

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Abstract

The invention relates to a solar tracking system posture adjustment method being able to prolong the solar measuring time of a space instrument, and belongs to the technical field of solar space measurement. The method comprises for making a space solar measuring instrument working on a sun-synchronous orbit to acquire more solar measuring time, acquiring the orbital elements of a spacecraft and the current system time and taking the orbital elements of a spacecraft and the current system time as the input parameters to calculate the position of the sun within the certain time frame before the solar measuring instrument enters the sun illumination zone; according to the input parameters of the first step, estimating the right ascension and the declination of the sun under an earth's core inertial coordinate system; calculating a coordinate transformation matrix from the earth's core inertial coordinate system to an orbital coordinate system, after coordinate transformation, acquiring the estimated coordinate position of the sun in the spacecraft orbital coordinate system; acquiring the estimated coordinate position of the sun in the spacecraft body coordinate system; acquiring the estimated coordinate position of the sun in the solar tracking system coordinate system; and taking the estimated coordinate position as the reference input for the control system, and driving a yaw oscillation sub system and a luffing sub system to move to a target position.

Description

technical field [0001] The invention relates to a method for adjusting the attitude of a solar tracking system of a solar measuring instrument in a near-earth orbit space, which can obtain more solar observation time for the solar measuring instrument, and belongs to the technical field of solar space measurement. Background technique [0002] At present, the change of the earth's climate environment is highly valued by governments, academic institutions and other organizations. Solar activity data is an important basic data for studying the changes of the Earth's climate system and the reasons for the changes. On-orbit measurement of solar activity can effectively remove the influence of external factors such as disturbances in the Earth's atmosphere, and reduce the impact of Earth's space orbital motion on the time resolution of solar activity measurement, which is a necessary means to obtain continuous and reliable solar data. [0003] At present, the use of instrument-a...

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Application Information

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IPC IPC(8): G05D1/08
CPCG05D1/0825
Inventor 王红睿方伟
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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