Initiative electromagnetic control system for slab and girder structure vibration

A technology of structural vibration and electromagnetic control, applied in the direction of non-rotational vibration suppression, which can solve the problems of affecting the control effect, limited size of piezoelectric actuator, and unchangeable damping coefficient

CN103244603BActive Publication Date: 2015-02-18QINGDAO TECHNOLOGICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-02-18

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Abstract

The invention discloses an initiative electromagnetic control system for slab and girder structure vibration. The initiative electromagnetic control system comprises a mechanical portion and a control portion. The mechanical portion comprises a wall made of nonferromagnetic materials, a slab and girder structure and electromagnets. One end of the slab and girder structure is connected with the wall, a displacement sensor is arranged on the slab and girder structure, and the electromagnets include electromagnets A, B, C and D. The control portion comprises a computer, a power amplifier and a full-wave rectification circuit without a filter. The computer is connected with the displacement sensor, an input end of the power amplifier is connected with the computer, one path of an output end of the amplifier is connected with the electromagnets A and D through a bridge rectification circuit without a filter while the other path of the same is directly connected with the electromagnets B and C. When the slab and girder structure vibrates, magnetic pole polarity and magnetic field intensity of the electromagnets can be automatically changed to attenuate the vibration quickly, so that damages to a mechanical system caused by vibration are reduced.
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Description

technical field

[0001] The invention relates to the technical field of mechanical vibration and noise control, in particular to an active electromagnetic control system for plate girder structure vibration. Background technique

[0002] When any mechanical system is dynamically excited or disturbed, it will produce a response, manifested as structural vibration and noise, which will not only reduce the performance of the mechanical system, but also endanger human health. With the development of aerospace, precision machinery, micro-nano technology, etc. With the development of the field, the suppression of structural vibration has become an important research topic in the design of various systems. However, most of the existing technologies are controlled by means of additional damping and piezoelectric smart structures, which have the following disadvantages:

[0003] 1) Due to frequent changes in the operating load and operating conditions of the equipment, the severity o...

Examples

Embodiment Construction

[0043] Combine below Figure 1 to Figure 1 2 and embodiment further illustrate the present invention.

[0044] An active electromagnetic control system for plate beam structure vibration, combined with Figure 1 to Figure 1 2c. The system includes a mechanical part and a control part. The mechanical part includes a wall 1 made of non-ferromagnetic material, a plate beam structure 4, and an electromagnet 2. One end of the plate beam structure 4 is connected to the wall 1, and the plate beam structure 4 is connected to the wall 1. Be provided with displacement sensor 5 on beam structure 4, described electromagnet 2 comprises electromagnet A, electromagnet B, electromagnet C, electromagnet D, wherein electromagnet A, electromagnet C are located in wall 1, described electromagnet B. The electromagnet D is located on both sides of the plate girder structure 4. The coil winding direction of the electromagnet A, electromagnet B, and electromagnet D is the same, and the coil winding ...