Flexible contilever plate vibration control set and control method based on acceleration sensor

A technology of acceleration sensor and flexible board, which is applied in the direction of mechanical oscillation control, non-electric variable control, measuring device, etc. It can solve the problems of poor real-time performance, different phase differences, and high accuracy requirements.

CN101261523AInactive Publication Date: 2008-09-10SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2008-09-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a flexible cantilever plate vibration control device on the basis of accelerometers and a control method. The device is symmetrically affixed with a plurality of piezoelectric ceramic sheets on the front and back surfaces of a fixed end of the flexible plate, the polarities of the two surfaces of a plurality of piezoelectric ceramic sheets are reverse, then a plurality of piezoelectric ceramic sheets are connected in parallel to compose a bending mode piezoelectric driver; the two surfaces of the longitudinal middle part of a free end of the flexible plate are anti-symmetrically affixed with a plurality of piezoelectric ceramic sheets, the polarities of the two surfaces of the piezoelectric ceramic sheets are same, then the piezoelectric ceramic sheets are connected in parallel to compose a torsional mode driver, an accelerometer A and an accelerometer B are respectively arranged at the two side angle positions of the free end of the flexible plate; the device has small weight and less wiring, which only needs the two accelerometers to be used as the sensors of the flexible cantilever plate. The method utilizes the optimized configuration of the two accelerometers and the piezoelectric driver to realize the decoupling on the detection and the driving control of the bending mode and the torsional mode of the flexible cantilever plate, thus realizing the purpose of active inhibition of multi-bending and multi-torsinal mode vibration of the flexible plate.
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Description

technical field

[0001] The present invention relates to vibration control of large flexible structures, in particular to a method and device for multi-mode active control of bending and torsional vibration of a space sailboard structure, and in particular to a multi-mode sensing based on multi-acceleration sensors and piezoelectric drivers. Controlled vibration control nonlinear control method and device. Background technique

[0002] Large-scale complexity and flexibility are an important development trend of spacecraft structures. On the one hand, the use of large flexible accessories increases the flexibility of spacecraft design and manufacturing and reduces launch costs. On the other hand, the resulting vibration problems become more and more prominent. The modal damping of such large flexible structures is small, High-order and low-frequency intensive, especially in space sports, under the condition of environmental disturbance, its large-scale vibration will last for...

Examples

Embodiment Construction

[0046] 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.

[0047] Such as figure 1 , 2, the vibration control device for a flexible cantilever plate based on an acceleration sensor includes a mechanical support clamping device 14, a flexible plate 2, a bending mode piezoelectric driver 1, a torsional mode driver 3, one of the acceleration sensors 4, an acceleration Sensor 2 5, extremely low frequency charge amplifier 7, multi-channel A / D conversion data acquisition card 8, computer 9, multi-channel D / A conversion card 10, multi-channel piezoelectric ceramic power supply 11, arbitrary function signal generator 12 and liquid crystal Display 13.

[0048] The clamping device 14 of the mechanical support is mainly composed of a flat rectangular base plate, a rectangular column bracket and an isosceles trapezoidal s...