Results 221 to 230 of about 39,725 (266)
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Liquid sealing type vibration control device
The Journal of the Acoustical Society of America, 2009Provided is a liquid sealing type vibration control device capable of sufficiently reducing strange sounds which comprises a first attachment fitting ( 1 ), a second attachment fitting ( 2 ), a vibration-isolating base body ( 3 ), a diaphragm ( 9 ), a partition body ( 12 ), and an orifice ( 25 ), the partition body ( 12 ) including an elastic partition
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Vibration control device for rotating machine
The Journal of the Acoustical Society of America, 1996The vibration control device is equipped in the rotating machine in which a primary yoke (11) is provided within a hollow space of a secondary yoke (12) so that the secondary yoke rotates about a shaft (1) inserted through the primary yoke. The vibration control device (10) comprises a plurality of electromagnet portions (11₁-11₈,13₁-13₈) arranged ...
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CONTROL OF BUILDING VIBRATIONS WITH ACTIVE/PASSIVE DEVICES
Earthquake Engineering & Structural Dynamics, 1996Two linear optimal control laws and a non-linear control strategy are critically evaluated. They are implemented in a ten-story frame structure. For the linear control laws, both an active bracing system and a hybrid mass damper are considered as control devices, while the non-linear control law can be implemented with either an active or semi-active ...
P. B. SHING +4 more
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Wind-Turbine Vibration Reduction Using Flow Control Devices
Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Gas and Liquid-Solid Two-Phase Flows; Numerical Methods for Multiphase Flow; Turbulent Flows: Issues and Perspectives; Flow Applications in Aerospace; Fluid Power; Bio-Inspired Fluid Mechanics; Flow Manipulation and Active Control; Fundamental Issues and Perspectives in Fluid Mechanics; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes, 2017The size of wind turbine blades has been continuously increased for better aerodynamic efficiency. However, the large scale blades induce loud noise and vibration as well as the increased difficulty in maintenance; all of these eventually causes the increase in the cost of energy. The vibration of wind turbines is mainly caused by wind turbulence, wind
Ho-Young Kim, Jae-Hung Han
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Piezoelectric Devices for Vibration Control on Flexible Structures
13th Biennial Conference on Mechanical Vibration and Noise: Structural Vibration and Acoustics, 1991Abstract A coupled numerical and experimental study, concerning the vibration control, on flexible structures by piezoelectric devices, is presented in this paper. More precisely we studied two cases of structure, a beam and a plate, in several configurations of excitation.
I. Legrain, P. Destuynder
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Study on Vibration Control Device Using Power Generator
Volume 8: Seismic Engineering, 2006In this paper, the authors propose a vibration control device using power generator in order to develop a small damper which is suitable for structural vibration control in space. The vibration control device consists of a ball screw, piston, ball nut, gear, power generator, and rod ends.
Takafumi Ohtake +2 more
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Process for controlling vibration damping force in a vibration damping device
The Journal of the Acoustical Society of America, 1996In order to develop sufficient vibration damping performance and effectively prevent transmission of goading vibrations and others in a vibration damping device using an electrorheological fluid, if the moving directions of vibration input side member and vibration output side member of the device are opposite to each other, a voltage applied to ...
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Controlling Floor Vibration with Active and Passive Devices
The Shock and Vibration Digest, 2003This paper reviews research, conducted by the authors over the last decade, pertaining to the control of ex- cessive floor vibration using active and passive devices. The active device studied uses a proof-mass actuator to deliver the control force to the floor system. Effectiveness and stabil- ity characteristics for a single-input/single-output (SISO)
Linda M. Hanagan +2 more
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Vibration Control Devices and their Application
2008The vibration control is of importance for preventing fractures of machines and structures. Recently various control methods have been developed. However, vibration control devices have not been discussed thoroughly. The present report introduces various vibration control devices developed in our laboratory[1]–[13].
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Electronic device, vibration generator, vibration-type reporting method, and report control method
The Journal of the Acoustical Society of America, 2008An electronic device drives an oscillatory actuator to cause generation of vibration when it is detected that an operation input to a touch panel or operation key has been received. The electronic device causes, by this vibration, the touch panel and operation key to vibrate in a direction perpendicular to their respective front surfaces. Alternatively,
Masaaki Fukumoto, Toshiaki Sugimura
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