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H_(∞)control in the frequency domain for a semi-active floor isolation system

Frontiers of Structural and Civil Engineering 2013年第3期7卷 264-275页

作者： Yundong SHI Tracy C BECKER Masahiro KURATA Masayoshi NAKASHIMA Graduate School of Engineering Kyoto UniversityKyoto 611-0011Japan Disaster Prevention Research Institute Kyoto UniversityKyoto 611-0011Japan

A floor isolation system installed in a single floor or room in a fixed base structure is designed to protect *** this configuration,the input motions to the floor isolation from the ground motions are filtered by the structure,leaving the majority of the frequency content of the input motion lower than the predominant frequency of the *** floor isolation system should minimize the acceleration to protect equipment;however,displacement must also be limited to save floor space,especially with long period ***-active control with an H_(∞)control was adopted for the floor isolation system and a new input shaping filter was developed to account for the input motion characteristics and enhance the effectiveness of the H_(∞)control.A series of shake table tests for a semi-active floor isolation system using rolling pendulum isolators and a magnetic-rheological damper were performed to validate the H_(∞)*** control using an oil damper was also tested for *** test results show that the H_(∞)control effectively reduced acceleration for short period motions with frequencies close to the predominant frequency of the structure,as well as effectively reduced displacement for long period motions with frequencies close to the natural frequency of the floor isolation *** H_(∞)control algorithm proved to be more advantageous than passive control because of its capacity to adjust control strategies according to the different motion frequency characteristics.

关键词： semi-active floor isolation H1 control MR damper shaping filter shaking table test

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