Results 311 to 320 of about 573,006 (357)
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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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The Journal of the Acoustical Society of America, 1996
A thixotropic material is charged in a container. The container also holds a movable member which is placed in the thixotropic material so as to stir the thixotropic material. A force transmitting element is connected to the movable member. When an object, the vibration of which is to be controlled, is out of resonance, the amplitude of vibration is so
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A thixotropic material is charged in a container. The container also holds a movable member which is placed in the thixotropic material so as to stir the thixotropic material. A force transmitting element is connected to the movable member. When an object, the vibration of which is to be controlled, is out of resonance, the amplitude of vibration is so
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The Journal of the Acoustical Society of America, 1991
A randomization unit for use in a vibrational control system for generating a series of randomized drive terms where the magnitude of each randomized drive term is the convolution of a psuedo random sequence of bistable signals and a drive data sequence characterized by a drive power spectral density (PSD).
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A randomization unit for use in a vibrational control system for generating a series of randomized drive terms where the magnitude of each randomized drive term is the convolution of a psuedo random sequence of bistable signals and a drive data sequence characterized by a drive power spectral density (PSD).
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2002
The practical problem of constructing a model, from which to design a helicopter vibration control system, is presented. This is done to provide a rather extreme example of the interaction between the modelling objective and the control design. This is done to reinforce the messages of earlier chapters dealing with modelling for control design and the ...
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The practical problem of constructing a model, from which to design a helicopter vibration control system, is presented. This is done to provide a rather extreme example of the interaction between the modelling objective and the control design. This is done to reinforce the messages of earlier chapters dealing with modelling for control design and the ...
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Cervical cancer prevention and control in women living with human immunodeficiency virus
Ca-A Cancer Journal for Clinicians, 2021Philip E Castle, Vikrant V Sahasrabuddhe
exaly