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Internal resonance type vibration reduction method suitable for space large-scale flexible structure

A flexible structure, large-scale technology, applied in the direction of non-rotational vibration suppression, geometric CAD, sustainable transportation, etc., can solve the problems of poor internal resonance vibration damping effect, unable to artificially adjust the coupling strength, etc., to achieve less energy consumption and strengthened control The effect of tuning performance

Active Publication Date: 2020-05-15
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

However, the coupling relationship between the modes is determined by the structure of the system, and the coupling strength between the two modes cannot be adjusted artificially; for some nonlinear systems with weak mode coupling, due to the energy exchange between the modes If the relationship is fixed, the effect of internal resonance vibration reduction will be poor

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  • Internal resonance type vibration reduction method suitable for space large-scale flexible structure
  • Internal resonance type vibration reduction method suitable for space large-scale flexible structure
  • Internal resonance type vibration reduction method suitable for space large-scale flexible structure

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Embodiment Construction

[0054] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation of the present invention is not limited thereto.

[0055] The invention proposes an internal resonance type vibration reduction method suitable for large-scale flexible structures in space. The internal energy exchange mechanism of internal resonance is used to construct the artificial coupling relationship between the vibration absorber mode and the controlled mode to realize vibration control.

[0056] Including dynamic modeling and internal resonance analysis of large space flexible structures and swing absorbers. In order to clearly and concisely describe the vibration reduction method proposed by the present invention, a simplified model is used here to replace the specific antenna model and vibration absorber model. The specific steps of the method are as follows:

[0057] Step 1: Establish the antenna defo...

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Abstract

The invention discloses an internal resonance type vibration reduction method suitable for a space large-scale flexible structure. The method comprises the following steps: establishing a vibration control equation of an antenna and a vibration absorber by utilizing a Kane method; introducing a nonlinear coupling feedback item, and constructing a feedback control model of the vibration absorber; solving a nonlinear vibration control equation by utilizing a singular perturbation method; and performing internal resonance analysis and stability analysis on the solution of the vibration equation.According to the invention, a nonlinear internal resonance vibration reduction mechanism is utilized, and a semi-active control mode is adopted, so that the vibration energy of the antenna is transmitted to the vibration absorber and dissipated. By adding the artificially constructed nonlinear feedback coupling item, the control and adjustment performance of the vibration absorber is enhanced, theresponse speed is high, the application range is wide, and the actual vibration reduction effect is obvious.

Description

technical field [0001] The invention relates to an internal resonance type vibration reduction method suitable for large-scale flexible structures in space. It constructs the artificial coupling relationship between the controlled mode of the antenna and the mode of the vibration absorber from the perspective of nonlinear vibration, and utilizes the internal energy of internal resonance The exchange mechanism transmits the vibration energy of the antenna to the vibration absorber, and completes the dissipation of the vibration energy with the help of the optimized damping of the vibration absorber. It can be specifically applied to the field of vibration reduction of large-scale flexible structures in space with highly coupled nonlinearity, low fundamental frequency and large flexibility. Background technique [0002] With the development of modern aerospace science and technology, the requirements for space exploration are gradually increasing, and the sailboard and antenna ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F30/15F16F15/02G06F111/10
CPCF16F15/02Y02T90/00
Inventor 张也弛胡江涛从强林秋红边宇枢黎彪王晓宇
Owner BEIJING INST OF SPACECRAFT SYST ENG
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