Results 211 to 220 of about 20,095 (267)

Active vibration damping actuator and active damping apparatus using the same

The Journal of the Acoustical Society of America, 2007
A vibration damping actuator including: a cup-shaped housing; an output member disposed spaced apart from an opening end of the housing; a guide rod disposed on the output member and positioned inserted into a guide hole; a coil member provided to one of the housing and the output member; an armature disposed on an other of the housing and the output ...
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Active damping in HDD actuator

2000 Asia-Pacific Magnetic Recording Conference. Digests of APMRC2000 on Mechanical and Manufacturing Aspects of HDD (Cat. No.00EX395), 2001
One of the limitations inherent in high-track-density hard disk drive design is the effect of actuator mechanical resonant modes on the head-positioning servo. The first servo bandwidth limiting mode is the so-called "butterfly mode," which is the major mode in the head mechanical transfer functions and can not be avoided through mechanical design.
null Fu-Ying Huang, T. Semba, W. Imaino, F. Lee   +3 more
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Active vibration damping system

The Journal of the Acoustical Society of America, 2009
A system (100, 200, 300) for damping vibrations of a vibratory structure (104, 308). The damping system includes an active damper (112, 124, 128, 216), a vibration sensor (116, 208, 208A′-C′), and a controller (120, 212) for controlling the active damper in a manner that damps vibration of the vibratory structure. In some embodiments, the active damper
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Active Front Steering Damping Control

Volume 16: Transportation Systems, 2007
This paper investigates the feasibility of steering-wheel damping enhancement control of an active front steer (AFS) system without the benefit of closed-loop feedback control and actuator control parameter adjustment. Through a comprehensive modeling and analysis of the AFS system, a simple, yet effective solution is reached to incorporate an ...
William C. Lin, Shih-Ken Chen
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Active piezo-electric damping composites

Proceedings of the 37th IEEE Conference on Decision and Control (Cat. No.98CH36171), 2002
Active piezo-electric damping composites (APDC) consisting of piezoelectric rods, which are obliquely embedded across the thickness of a viscoelastic damping matrix, are presented. In this configuration, activation of the piezo-rods simultaneously enhances both the shear and compression damping characteristics of the composite. With such active/passive
A. Baz, A. Tempia
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Active Damping of Driveline Oscillation

IFAC Proceedings Volumes, 2004
Abstract This controller approach describes a method for active damping of torsional vibrations in a vehicle driveline during clutch engagement. The problem of oscillations appears in a wide range of drivelines equipped with an automated clutch capacity controller, e.g. continuously variable automatic transmission (CVT), automated manual transmission
Andreas Schwenger, Michael Henn, Uwe Hinrichsen, Helmut Haase   +3 more
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Active Vibration Damping in Beams

1989 American Control Conference, 1989
The traveling wave approach is discussed of the active vibration control of beam. First an active vibration control for the TIMOSHENKO-beam is designed using external control forces. Then vibration control by means of internal forces. i.e. force systems forming equilibrium groups is discussed. Finally an unexpected resonance phenomenon occuring in this
P. Hagedorn, J. Wallaschek, P. Chen
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Active Damping of Large Trusses

2017
This chapter reviews various ways of damping large space trusses. The first part discusses the use of active struts consisting of a piezoelectric actuator collocated with a force sensor. The guaranteed stability properties of the integral force feedback are reviewed and the practical significance of the modal fraction of strain energy is stressed.
Preumont, André, Bossens, Frédéric, Loix, Nicolas   +2 more
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Active Damping Based on Decoupled Collocated Control

IEEE/ASME Transactions on Mechatronics, 2005
Robust stability of controlled mechanical systems is often obtained using collocated actuator-sensor-pairs. Collocation enables the implementation of a passive control law, which is robustly stable, irrespective of structural modeling errors. Within the context of vibration control, this knowledge is used to obtain robust active damping.
Holterman, Jan, de Vries, Theo J.A.
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Active Control for Vibration Damping

1988
Active control laws are developed for an LSS-type structure to damp vibrations. High frequency modelling uncertainties lead to the necessity for a robust control design. The Linear Quadratic Gaussian with Loop Transfer Recovery (LQG/LTR) control design technique is a particular robust design technique selected for use in designing a damping control ...
P. J. Lynch, Siva S. Banda
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