Semi-active magnetic-current variable-piezoelectric feedback type damper

Abstract

The invention discloses a semi-active magnetic-current variable-piezoelectric feedback type damper, comprising an inner tube and an outer tube. A revolving shaft is arranged in the middle of the innertube, and is fixedly connected with two vanes which are arranged by the angle of 180 degrees in the inner tube. The vanes are hollow and provided with mass blocks inside respectively, the upper and lower ends of each mass block are connected with the inner wall of the corresponding vane through springs. Two thin plates are arranged in the inner tubes and perpendicular to the vanes respectively. The cavity of the inner tube is filled with magnetorheological fluid. Piezoelectric generator units are respectively arranged on the surfaces of the thin plates, and pressure sensors are respectively arranged at the tops of the piezoelectric generator units. The outer wall of the inner tube is wound with a field coil along the axis direction. The pressure sensors, the field coil, a controller and an electric power extracting and storing unit are in series connection to form a closed loop, wherein the controller and the electric power extracting and storing unit are arranged at the top of the inner tube.

Description

technical field [0001] The invention relates to a semi-active magneto-rheological piezoelectric energy-fed damper, in particular to a vertical and torsional anti-vibration device combined with magnetorheological and piezoelectric ceramics, which is mainly used for large-span reticulated shells and bridges Vibration control of space structures. Background technique [0002] With the rapid development of social economy and industry, the impact of environmental vibration on building safety, applicability and daily life has attracted widespread attention. In recent years, structural vibration collapse accidents induced by wind, earthquake and other environmental loads have occurred frequently. In the field of civil engineering, buildings with complex structural forms have uneven stiffness distribution, and high-rise structures are prone to torsional damage under strong vibration. Unbelievable. At present, vibration control technology is an effective method to reduce structura...

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Problems solved by technology

[0004] At present, there are more and more examples of using vibration control devices for vibration control in actual engineering. Most of them focus on the research of vibration control in the horizontal direction, while ignoring the control of structural torsion and vertical response, and the devices are limited to passive control. Principle, lack of flexibility to control

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