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High-precision dynamic modeling method for spatial large-scale rigid-flexible coupling system

A dynamic modeling and coupling system technology, applied in the field of high-precision dynamic modeling of large-scale rigid-flexible coupling systems in space, can solve problems such as inaccuracy, lack of consideration of antenna parabolic reflector structure model, incompleteness, etc. , to facilitate design, reduce degrees of freedom, and improve accuracy

Active Publication Date: 2021-10-22
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] However, in the existing literature, such as "Research on Dynamic Characteristics of a Class of Slender Truss Spacecraft" and "Research on Vibration Suppression and Attitude Control Method of Smart Truss Satellite", the structural model of the antenna parabolic reflector is not considered. It is incomplete and imprecise to only consider the truss structure

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  • High-precision dynamic modeling method for spatial large-scale rigid-flexible coupling system
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  • High-precision dynamic modeling method for spatial large-scale rigid-flexible coupling system

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[0083] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0084] The technical scheme adopted in the present invention comprises the following steps:

[0085] Step 1: Antenna and truss equivalent model and parameter extraction

[0086] Step 2: Establish the rigid-flexible coupling system coordinate system

[0087] Step 3: Determine generalized coordinates and generalized forces

[0088] Step 4: System dynamics modeling based on Lagrangian principle

[0089] Ste...

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Abstract

The invention relates to a high-precision dynamic modeling method for a spatial large-scale rigid-flexible coupling system, and belongs to the technical field of spaceflight. The method comprises the following steps: performing continuous displacement modal discretization on an equivalent model comprising an antenna parabolic cylinder reflector structure and a large space truss through a hypothesis modal method, determining generalized coordinates and generalized force, and finally modeling the system based on the Lagrange principle. The core of the modeling method is to provide a high-precision modeling method for the rigid-flexible coupling system based on the Lagrange principle on the basis of comprehensively considering the structure of the truss antenna. The built model comprises the truss equivalent model of the antenna parabolic cylinder structure, the accuracy of the truss type antenna model is improved, and the defects of an existing truss modeling method are overcome.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to a high-precision dynamic modeling method applied to a space large-scale rigid-flexible coupling system. Background technique [0002] At present, the number of spacecraft dominated by large-scale flexible structures in space is increasing. As the size of flexible structures increases, the rigid-flexible coupling characteristics of the system are enhanced, and the traditional rigid-body model is no longer applicable. The antenna is used as a communication spacecraft. The parabolic cylinder connected to the support truss is the main body of the flexible structure. The adjustment of its attitude angle is of great significance to the stability of the system and the communication capability. [0003] However, in the existing literature, such as "Research on Dynamic Characteristics of a Class of Slender Truss Spacecraft" and "Research on Vibration Suppression and Attitud...

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Application Information

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IPC IPC(8): G06F30/20G06F30/17G06F119/14
CPCG06F30/20G06F30/17G06F2119/14
Inventor 张帆侯新宇黄攀峰张夷斋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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