NDLI: Smart passive system based on mr damper.

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Smart passive system based on mr damper.

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Abstract	Magnetorheological (MR) dampers are one of the most promising control devices for civil engineering applications to earthquake hazard mitigation, because they have many advantages such as small power requirement, reliability, and low price to manufacture. To reduce the responses of the controlled structure by using MR dampers, a control system including power supply, controller, and sensors is needed. However, it is not easy to apply the MR damper-based control system to large-scale civil structures, such as cable-stayed bridges and high-rise buildings, because of the difficulties of building up and maintaining the control system. This paper proposes a MR damper with an electromagnetic induction (EMI) system for a civil engineering application, which consists of a permanent magnet and a coil. According to the Faraday’s law of induction, the EMI system changes kinetic energy of a MR damper to electric energy and then electric energy is used to vary the damping characteristics of the MR damper. It is easy to build up and maintain the proposed MR damper with the EMI system, because it does not require any control system such as a power supply, controller, and sensors. To verify the effectiveness of the proposed EMI system, the performances are compared with those of the normal MR damper. The numerical results show that the MR damper with the EMI system has the comparable performance to the normal MR damper system. 1.
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Access Restriction	Open
Subject Keyword	Mr Damper Control System Emi System Power Supply Civil Engineering Application Numerical Result Large-scale Civil Structure Low Price Many Advantage Normal Mr Damper Promising Control Device Normal Mr Damper System Electric Energy Permanent Magnet Earthquake Hazard Mitigation Small Power Requirement Cable-stayed Bridge Comparable Performance Mr Damper-based Control System Electromagnetic Induction Emi System Change Kinetic Energy High-rise Building
Content Type	Text
Resource Type	Article

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