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Dynamic modeling method and system for space inflatable deployment structure

A technology of dynamic modeling and space inflation, which is applied in the direction of constraint-based CAD, special data processing applications, instruments, etc., can solve the problem that it is impossible to accurately describe the dynamic characteristics of spatial movement and deformation coupling of space inflation expansion structures, and achieve Accurately describe, improve the effect of accuracy

Pending Publication Date: 2021-07-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The purpose of the present invention is to provide a dynamic modeling method and system for a space inflatable unfolding structure, which can establish an accurate dynamic model for the space inflatable unfolding structure, and solve the problem that the existing dynamic modeling method cannot accurately describe the space inflatable unfolding structure The dynamics problem of coupled spatial motion and deformation during unfolding

Method used

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  • Dynamic modeling method and system for space inflatable deployment structure
  • Dynamic modeling method and system for space inflatable deployment structure
  • Dynamic modeling method and system for space inflatable deployment structure

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Embodiment 1

[0064] Such as figure 1 As shown, this embodiment proposes a dynamic modeling method for a space inflatable unfolded structure, which specifically includes the following steps:

[0065] Step S1, using the ALE-ANCF time-varying length thin-shell element and the natural coordinate method to perform dynamic modeling on the co-frame type inflatable deployment satellite system, and obtain the dynamic model of the rigid-flexible coupling system;

[0066] Such as figure 2 As shown, the co-rack type inflatable deployment satellite system includes a centrally located rigid body satellite 1, three sub-stars 2 evenly distributed around the rigid body satellite 1, and a flexible inflatable tube 3 connecting the rigid body satellite 1 and the sub-stars 2, There are 3 flexible inflatable tubes 3 in total, and the two ends of each flexible inflatable tube 3 are the unfolded end 5 and the folded end 4 respectively. The sub-stars 2 are connected, and the folded ends 4 are directly connected...

Embodiment 2

[0160] Such as Figure 10 As shown, this embodiment proposes a dynamic modeling system for a space inflatable unfolded structure, which specifically includes:

[0161] The dynamic model building module 7 is used for dynamic modeling of the co-frame type inflatable deployment satellite system by using the ALE-ANCF time-varying length thin shell element and the natural coordinate method to obtain the rigid-flexible coupling system dynamic model;

[0162] The initial generalized vector acquisition module 8 is used to perform grid division on the flexible inflatable tube 3 in the co-rack type inflatable deployment satellite system according to the dynamic model of the rigid-flexible coupling system to obtain the rigid-flexible coupling The initial generalized coordinate vector and initial generalized velocity vector of the system dynamics model;

[0163] A kinematic constraint equation establishing module 9, configured to establish a kinematic constraint equation of the rigid-fle...

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Abstract

The invention relates to a dynamic modeling method and system for a space inflatable deployment structure, and the method comprises the steps of firstly carrying out the dynamic modeling of a common-rack inflatable deployment satellite system through employing an ALE-ANCF time-varying length thin shell unit and a natural coordinate method, and obtaining a rigid-flexible coupling system dynamic model; performing grid division on a flexible inflation tube in the common-rack type inflatable unfolding satellite system, and obtaining an initial generalized coordinate vector and an initial generalized velocity vector of a rigid-flexible coupling system dynamic model; establishing a kinematics constraint equation of the dynamic model of the rigid-flexible coupling system; introducing the kinematics constraint equation into the kinetic equation to obtain a kinetic equation after time domain discretization, and solving and carrying out overlong boundary unit processing to obtain a processed rigid-flexible coupling system kinetic model; and finally, in combination with an ideal gas equation, calculating a change curve of the expansion length along with the inflation time at different inflation rates, so that the accuracy of calculating dynamic response can be improved, and an accurate dynamic model is constructed.

Description

technical field [0001] The invention relates to the field of modeling of an inflatable unfolding structure, in particular to a dynamic modeling method and system for a space inflatable unfolding structure. Background technique [0002] In recent years, with the development of aerospace structures in the direction of large-scale, lightweight, and complex, the space inflatable deployment structure has been widely used in the execution of spacecraft on-orbit due to its advantages of small volume, light weight, and high deployment efficiency. Task. Future space exploration requires telescopes with higher resolution to facilitate deep space exploration and research in more fields. By establishing a co-rack type inflatable deployment satellite system composed of multiple sub-satellites and a central satellite connected by a flexible and expandable inflatable tube, the high-resolution requirements required for deep space exploration can be met. [0003] However, although the rack...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F111/04G06F119/14
CPCG06F30/23G06F2119/14G06F2111/04
Inventor 孙加亮金栋平曹华科
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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