Results 261 to 270 of about 553,470 (307)
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Adaptive vibration control using a virtual-vibration-absorber controller
Journal of Sound and Vibration, 2007A control algorithm emulating a dynamic vibration absorber (DVA) is developed for a flexible structure subject to harmonic disturbances of uncertain frequency. The virtual vibration absorber is mathematically equivalent to a passive DVA, but its stiffness, inertia and damping coefficient are adjustable by software.
Shang-Teh Wu, Ying-Jhe Shao
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Friction Control for Vibration Suppression
Volume 7B: 17th Biennial Conference on Mechanical Vibration and Noise, 1999Abstract Friction damping in bolted joint connections of large space structures turned out to be a major source of damping (Gaul and Bohlen, 1987). For vibration suppression, the joints are designed such that the normal force in a frictional interface is controlled which improves damping performance. The use of active control to vary the
L. GAUL, R. NITSCHE
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Vibrational control without averaging
Automatica, 2015zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jordan M. Berg +1 more
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Active control of mechanical vibrations
Bell Labs Technical Journal, 2009Recent advances in digital signal processing and actuation technology have opened the door to applying active control to reducing mechanical vibrations and acoustic noise. Because these techniques work best at lower frequency, they complement conventional passive damping techniques, which are most effective at higher frequencies.
Roger D. Benning +2 more
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Vibration Analysis vs. Vibration Control
SAE Technical Paper Series, 2005<div class="htmlview paragraph">Car manufacturing companies and their suppliers allocate significant human and financial resources to NVH-related R&D. While the most advanced instrumentation and analytical techniques are used for these activities, the incremental improvements of NVH are rather small due to extreme complexity of the ...
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On vibration control of a concrete pump
1999 European Control Conference (ECC), 1999Using robots for very wide operating ranges, as in the case of concrete pumps, requires that elastic deformations of the links be taken into account. From a structural point of view a rigid design is impossible. In addition, these applications demand actuators with a significant power density, able to produce high forces with fast response which can be
Nissing, Dirk +2 more
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Vibration controllability of flexible manipulators
Proceedings of the 1994 IEEE International Conference on Robotics and Automation, 2002Discusses the structural vibration controllability of flexible manipulators. In spatial flexible manipulators, the structural vibration controllability would be configuration-dependent. Therefore, the flexible manipulator might have some vibration uncontrollable configurations and thus a discussion on the vibration controllability is a must.
Atsushi Konno +3 more
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Vibration control by confinement of vibration energy
The Journal of the Acoustical Society of America, 2005A method for controlling vibration energy in a structure having a vibrating member using a vibration confinement device is provided. The vibrating member has boundaries and vibrates relative to the boundaries. The method includes selecting a vibration confinement region in the vibrating member relative to the boundaries.
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On Optimal Control of the Vibrating String
SIAM Journal on Control, 1969The paper under discussion refines some work done by the reviewer [SIAM J. Control 4, 276--294 (1966; Zbl 0166.35805)]. It is concerned with control of the vibrating string, represented by the partial differential equation \[ \rho \frac{\partial^{2} w}{\partial t^{2}}-\tau \frac{\partial^{2} w}{\partial x^{2}}=0, \quad 0 \leq x \leq l, \quad 0 \leq t ...
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Measrement and Control of Conductor Vibration
Transactions of the American Institute of Electrical Engineers, 1941A method is outlined for determining the effectiveness of devices used for prevention of vibration fatigue in transmission conductors. Measuring equipment is described which provides records of conductor vibration in the quantitative form essential for such determinations.
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