Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Heavy Industries Limited

Hideaki Harada

Hisanori Abiru

Jun Hirai

Kazumi Tamura

Manabu Fujishiro

Atsushi Kubo

Yoshiaki Okubo

Minoru Kawabata

Yasuo Ogi

Hiroshi Ikeda

Kenji Imada

Keisuke Sasajima

Souhei Tateyama

It is intended to provide a vibration control apparatus that can be installed in a small pace and can be produced at low cost, as well as a wind turbine generator equipped with the vibration control apparatus and a vibration control method. The vibration control apparatusincludes a first vibration systemof inverted-pendulum type, second vibration systemsof inverted-pendulum type which are provided on both sides of the first vibration system, a restraining unitwhich restrains a first weightof the first vibration systemand a second weightof the second vibration systemand a damper which damps vibration of the first weightand the second weight. The vibration control apparatusis installed on an upper floorof a plurality of floors

Vibration control apparatus, wind turbine generator and vibration control method

A seismic isolation system is provided with a swing bearing ring consisting of an upper ring and a lower ring, which are rotatable relatively, between a crane body and a traveling means. A lower vertical shaft of a block pivotally supported on saddles of the crane body is supported by a swing bearing provided at an eccentric position on the upper ring. An automatic restoring mechanism is provided which restores the swing of a horizontal lever, whose proximal end is installed to the upper ring of the swing bearing ring, around the centerline C2.

Seismic isolation system for a crane

The present invention provides a lever-type frictional resistance force variable system comprising an arm whose upper end is rotatably supported by an upper beam; a supporting member which is fixed to a lower beam to rotatably support the intermediate portion of the arm; a braking device having frictional resistance plates connected to the lower end side of the arm, frictional pads provided between the frictional resistance plates, a pressing pad, and a screw rod; a turning lever connected to the screw rod; a ball screw threadedly engaging with the turning lever; a servomotor for rotating the ball screw; a displacement sensor for detecting a displacement of a frame; and a control unit for determining a braking force to be generated by the braking device based on the detected value of the displacement sensor and outputting a control signal according to the determined braking force.

Lever-type frictional resistance force variable system

A long period pendulum damping equipment having right and left pair of longer rods, right and left pair of shorter rods and a tie beam connecting these longer rods and shorter rods one another, in which a tilt angle interlocking means of both rods installed at right and left end portions of the tie beam, respectively, and keeping the tilt angle in one direction of the longer rod with respect to a vertical line always equal to the tilt angle in another direction of the shorter rod or certain ratio times thereof is provided, and a long period is provided and an installation space is made small while making the overall height low by pivoting a weight to either one of the longer or shorter rod.

Long period pendulum damping equipment

Disclosed is a dynamic damper which is to absorb building vibrations in any horizontal directions, not restricted to one direction. For example, it comprises an oscillating body which is held to move horizontally, a plurality of ball screws which are arranged perpendicularly to each other with a height difference among them and which have a nut portion on the side of the oscillating body and a screw shaft engaging with said nut portion, and motors which reciprocate the oscillating body according to the period of vibration of the building by turning the ball screws.

Dynamic damper and method for detecting malfunction of dynamic damper

Growing community of inventors

Hiroshima, Japan

Hideaki Harada