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Ultra-low frequency modal test gravitational equilibrium system

A modal test, gravity balance technology, applied in vibration test, machine/structural component test, measurement device, etc., can solve the problem of inability to realize horizontal modal test air flotation device

Inactive Publication Date: 2013-04-24
嘉兴卉景园林有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the shortcomings of the existing modal test devices that cannot realize the horizontal modal test and the design of the air flotation device, the present invention provides an ultra-low frequency modal test gravity test with basically unconstrained planar movement and no friction and inertial force. balance system

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] refer to Figure 1~Figure 14 , a gravity balance system for ultra-low frequency modal tests, comprising a horizontal excitation modal suspension device 4, a vertical follow-up modal suspension device 6, a mounting base 2, a bracket 5 and a mobile adjustment seat 3, the horizontal excitation modal suspension device 4 is installed on the installation base 2, the vertical follow-up mode suspension device 6 is installed above the horizontal excitation mode suspension device 4 through the bracket 5, and the moving adjustment seat 3 is installed under the installation base 2.

[0043] The horizontal excitation modal suspension device 4 includes an air-floating ring mounting plate 10, a proximity switch 12, an air-floating ring 20, an air-floating plate 14, a clamping rope assembly, a load-reducing hanging column 17, a linear guide rail 18, a linear slide rail 21, ...

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Abstract

The invention discloses an ultra-low frequency modal test gravitational equilibrium system which comprises a horizontal motivation modal suspension device, a vertical servo modal suspension device, an installation base, a support and a movable adjustment base. The horizontal motivation modal suspension device is installed on the installation base. The vertical servo modal suspension device is arranged above the horizontal motivation modal suspension device through the support. The movable adjustment base is arranged below the installation base. The horizontal motivation modal suspension device comprises a gas floating ring installation board, a proximity switch, a gas floating ring, a floating panel and a rope-clamping assembly. The vertical servo modal suspension device comprises a machine frame, an installation framework, a movable cross beam, a guiding rod, a main rod, an air bearing, a limiting device, a laser displacement sensor, a load sensor, a floating system and a magnetic system. Plane motion of the ultra-low modal test gravitational equilibrium system is not influenced by restriction, a friction force or an inertia force basically.

Description

technical field [0001] The invention relates to a modal test device, in particular to an ultra-low frequency modal test device. Background technique [0002] With the rapid development of aerospace technology, the demand for low-frequency and ultra-low frequency modal test analysis is increasing. In order to have accurate modal parameters for reference in the design of the spacecraft to avoid unnecessary errors such as resonance, it is necessary to conduct modal analysis tests on the spacecraft. The modal analysis test tests the dynamic characteristics, natural frequency, mode shape and damping, generalized mass, generalized stiffness, etc. [0003] Weightlessness is a major feature of the space environment. This leads to the classic problem of dynamic testing of structural parts under simulated weightlessness environment. The gravity of the load is balanced by the suspension force of the suspension system, and it is required that a large dynamic restraint force cannot be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
Inventor 孙建辉周海清单晓杭
Owner 嘉兴卉景园林有限公司
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