A method and a system for identifying pressure moment of solar light based on real-time recursion
A technology of solar light pressure moment and solar light pressure, which is used in special data processing applications, instruments, electrical digital data processing, etc.
Active Publication Date: 2018-12-07
BEIJING INST OF CONTROL ENG
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[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method and system based on real-time recursive solar pressure moment identification, which solves the calculation of the solar pressure moment of the satellite in orbit, and improves the solar pressure moment The accuracy of the calculation does not need to consider factors such as the geometric shape and optical characteristics of each surface of the satellite when calculating the solar light pressure
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[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0038] This embodiment provides a real-time recursive solar pressure moment identification method, including the following steps:
[0039] (1) A three-axis m...
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A method and a system for identify pressure moment of solar light based on real-time recursion are disclose. The method comprises the following steps: maintaining a three-axis stable attitude of a satellite through attitude feedback control; establishing an estimation model of solar pressure moment; establishing the dynamic equations of solar pressure moment and angular momentum by using the orbital angular momentum equation, and discretizing the dynamic equations; collecting the angular momentum of the satellite in orbit according to a fixed time interval, and calculating the actual solar pressure moment according to the angular momentum change; then calculating the triaxial modified gain coefficient; modifying the coefficient of the solar pressure estimation model; updating the varianceof prediction error by using satellite local time-angle series matrix; according to the series of solar pressure coefficients, obtaining the solar pressure coefficients. The invention solves the calculation of the solar light pressure moment of the satellite in orbit, improves the precision of the calculation of the solar light pressure moment, and does not need to consider factors such as geometrical shapes of each surface of the satellite, optical characteristics and the like in the calculation of the solar light pressure.
Description
technical field [0001] The invention belongs to the technical field of space vehicle dynamics modeling and calculation, and in particular relates to an identification method and system based on real-time recursive solar pressure moment. Background technique [0002] This method is an on-orbit calculation method for the solar light pressure moment of the satellite in orbit. Accurately obtaining the magnitude of the solar light pressure is an effective means to improve the control accuracy and performance of the satellite. Patent CN201310525249.X disclosed a solar light pressure calculation method for high-orbit optical imaging satellites in 2014. The solar light pressure reflection model described in the patent includes a cube used to represent the satellite body and a square plate used to represent the satellite sail. Solar light pressure is calculated using the reflection model by calculating the relationship of the cube and the sail to the sun. When the method is implemen...
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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20Y02E60/00
Inventor 林波王典军曾海波汤亮武云丽沈莎莎刘江彭坤
Owner BEIJING INST OF CONTROL ENG