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Vibrator, vibration unit, and vibrator control method
The Journal of the Acoustical Society of America, 2006A vibrator has massaging balls supported by a treating unit that may be shifted along a subject portion for treatment, guided by guiding members. The treating unit is supported by a supporting structure with respect to the guiding members. A position or orientation altering mechanism is provided for altering the position of the treatment unit in a ...
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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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The Journal of the Acoustical Society of America, 1993
To reduce noise inside a motor car passenger compartment, two loudspeakers (371, 372) are driven by signals derived from a reference signal x(n) by adaptive filtering carried out by a programmed microprocessor and memory unit (36) which adapts the filtering in dependence on error signals el(n) from four microphones (421, 422, 423 and 424) distributed ...
Stephen J. Elliott +2 more
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To reduce noise inside a motor car passenger compartment, two loudspeakers (371, 372) are driven by signals derived from a reference signal x(n) by adaptive filtering carried out by a programmed microprocessor and memory unit (36) which adapts the filtering in dependence on error signals el(n) from four microphones (421, 422, 423 and 424) distributed ...
Stephen J. Elliott +2 more
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IFAC Proceedings Volumes, 1987
Abstract It is shown that in addition to closed loop pole placement, vibrational feedback controllers lead, in the sense specified below, to a possibility of open loop zeros assignability. On this basis, the superior performance characteristics of continuous time periodic controllers, discovered in [5]-[8], are explained.
S. Lee, S.M. Meerkov, T. Runolfsson
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Abstract It is shown that in addition to closed loop pole placement, vibrational feedback controllers lead, in the sense specified below, to a possibility of open loop zeros assignability. On this basis, the superior performance characteristics of continuous time periodic controllers, discovered in [5]-[8], are explained.
S. Lee, S.M. Meerkov, T. Runolfsson
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The Journal of the Acoustical Society of America, 1991
A vibration control apparatus of the present invention detects a physical value influencing characteristics of a suspension for supporting a vibrating body and a state value representing movement of the suspension, calculates an optimal target control force in consideration of an external force or disturbance acting on the suspension on the basis of ...
Shunichi Doi +2 more
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A vibration control apparatus of the present invention detects a physical value influencing characteristics of a suspension for supporting a vibrating body and a state value representing movement of the suspension, calculates an optimal target control force in consideration of an external force or disturbance acting on the suspension on the basis of ...
Shunichi Doi +2 more
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The Journal of the Acoustical Society of America, 1997
A vibration control device including a bracket, and a vibration control body. The bracket has a stay portion for connection to an engine, a flange portion formed at one end of the stay portion, and a stabilizer portion to damp large magnitude movements of the body.
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A vibration control device including a bracket, and a vibration control body. The bracket has a stay portion for connection to an engine, a flange portion formed at one end of the stay portion, and a stabilizer portion to damp large magnitude movements of the body.
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Journal of the Franklin Institute, 1977
Abstract The theory of vibrational control is developed. The necessary and sufficient conditions for vibrational stabilizability of linear dynamic systems are found. Basic relations of the vibrational control method and the optimal shape of vibrations are determined. Unlike conventional methods, based on feedback or feedforward principles, the method
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Abstract The theory of vibrational control is developed. The necessary and sufficient conditions for vibrational stabilizability of linear dynamic systems are found. Basic relations of the vibrational control method and the optimal shape of vibrations are determined. Unlike conventional methods, based on feedback or feedforward principles, the method
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Mechanical Vibrations and Vibration Control
1994In these lectures, an introduction is given into the basic concepts of the theory of active and passive vibration damping. First one degree of freedom systems are discussed with respect to the different solution techniques and with view to damping and isolation mechanisms.
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Controlling laboratory vibrations
Nature, 1991Tabletop vibrations, when not controlled, can adversely affect sensitive instrumentation. The sources of these laboratory vibrations and various vibration control methods are discussed.
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The Journal of the Acoustical Society of America, 1985
A vibration compensation system for actively attenuating the vibration of a machine. The machine has a housing, with respect to which vibration is to be damped, and at least one body moving within the housing. The vibration compensation system includes a countermass capable of being linearly reciprocated relative to the housing in a direction parallel ...
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A vibration compensation system for actively attenuating the vibration of a machine. The machine has a housing, with respect to which vibration is to be damped, and at least one body moving within the housing. The vibration compensation system includes a countermass capable of being linearly reciprocated relative to the housing in a direction parallel ...
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