Jet type driver-based apparatus and method for inhibiting flexibility structural vibration

A technology of structural vibration and drive, which is applied in non-rotational vibration suppression, aerospace vehicle guidance devices, aircraft, etc., can solve the problems of low power of piezoelectric drive and long time required for vibration suppression of large flexible structures, etc., and achieve the goal of overcoming power Small size, fast energy consumption, and simple operation

Inactive Publication Date: 2008-12-24
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, for the vibration control of large flexible structures, the power of piezoelectric actuators is relatively low, so it takes a long time to suppress the vibration of large flexible structures

Method used

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  • Jet type driver-based apparatus and method for inhibiting flexibility structural vibration
  • Jet type driver-based apparatus and method for inhibiting flexibility structural vibration
  • Jet type driver-based apparatus and method for inhibiting flexibility structural vibration

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention is not limited to the scope expressed by the examples.

[0024] like figure 1 As shown, a device for suppressing the vibration of a flexible structure based on a jet driver selects the extension size of the flexible beam 3 as 620mm×150mm×1.78mm (respectively length, width and height, respectively x, y in the coordinate system and z) epoxy resin beam as a simulated flexible space structure, the elastic modulus of the epoxy resin beam is E b =34.64GPa, the density is ρ b =1865kg / m3; the flexible beam 3 of this device is fixed as a cantilever beam by the base 19 and the support 20 of the mechanical support clamping device. At the transverse 20-25 mm of the fixed end of the flexible beam, a plurality of piezoelectric ceramic sheets (preferably 4 pieces in this example) are pasted symmetrically along the front a...

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Abstract

The invention discloses a device and a method for inhibiting flexible structure vibration, based on jet drivers. The device has two nozzles as the jet drivers respectively arranged on the front and the back of the transverse middle part of a flexible beam. On a pneumatic circuit, two nozzles are respectively connected with a two-bit triple valve through pneumatic nozzle joints; the two-bit triple valve is connected with a pneumatic proportional valve; the pneumatic proportional valve is connected with a pneumatic three-link piece; and the pneumatic three-link piece is connected with an air pump. On circuit drive, the two-bit triple valve and the pneumatic proportional valve are connected with a switch valve driving-amplifying circuit board; and the switch valve driving-amplifying circuit board is connected with a multi-channel D/A conversion card. The method for inhibiting flexible structure vibration comprises the following steps that: according to the bending mode information sensed by a piezoelectric sensor and an acceleration sensor, after an active vibration control strategy for switching control is operated, large-amplitude vibration is controlled to attenuate through the jet drivers. The device fully utilizes the characteristic that the jet drivers are high in power, so as to rapidly inhibit large-amplitude vibration.

Description

technical field [0001] The present invention relates to vibration control of large-scale flexible structures, in particular to a device and method for active vibration control of flexible space structures. The driver, the piezoelectric sensor and the acceleration sensor are configured to realize active vibration control device and method. Background technique [0002] Large space flexible structural accessories such as solar panels and antennas are characterized by large size, light weight, high flexibility, small modal damping, low natural frequency of vibration and dense distribution, so vibration problems after disturbance are inevitable, so it is necessary to Active control of vibration. Especially in space conditions, flexible structures are more difficult to control. Therefore, the active control of vibration of large flexible structures has become an important and challenging topic of widespread concern in the world today. The vibration characteristics of large space...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/22B64G1/24F16F15/02
Inventor 邱志成
Owner SOUTH CHINA UNIV OF TECH
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