A structure excited by a DC motor of limited power supply and controlled by a pendulum like device

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dc.contributor.authorBrasil, R. M L R F
dc.contributor.authorBalthazar, José Manoel [UNESP]
dc.contributor.authorFeitosa, L. C.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:23:34Z
dc.date.available2014-05-27T11:23:34Z
dc.date.issued2008-06-17
dc.description.abstractIn this paper, a mathematical model is derived via Lagrange's Equation for a shear building structure that acts as a foundation of a non-ideal direct current electric motor, controlled by a mass loose inside a circular carving. Non-ideal sources of vibrations of structures are those whose characteristics are coupled to the motion of the structure, not being a function of time only as in the ideal case. Thus, in this case, an additional equation of motion is written, related to the motor rotation, coupled to the equation describing the horizontal motion of the shear building. This kind of problem can lead to the so-called Sommerfeld effect: steady state frequencies of the motor will usually increase as more power (voltage) is given to it in a step-by-step fashion. When a resonance condition with the structure is reached, the better part of this energy is consumed to generate large amplitude vibrations of the foundation without sensible change of the motor frequency as before. If additional increase steps in voltage are made, one may reach a situation where the rotor will jump to higher rotation regimes, no steady states being stable in between. As a device of passive control of both large amplitude vibrations and the Sommerfeld effect, a scheme is proposed using a point mass free to bounce back and forth inside a circular carving in the suspended mass of the structure. Numerical simulations of the model are also presented Copyright © 2007 by ASME.en
dc.description.affiliationPolytechnique School USP, SP
dc.description.affiliationDEMAC-IGCE-UNESP, Rio Claro, SP
dc.description.affiliationUnespDEMAC-IGCE-UNESP, Rio Claro, SP
dc.format.extent1721-1725
dc.identifierhttp://dx.doi.org/10.1115/DETC2007-35102
dc.identifier.citation2007 Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, DETC2007, v. 5 PART C, p. 1721-1725.
dc.identifier.doi10.1115/DETC2007-35102
dc.identifier.scopus2-s2.0-44949155507
dc.identifier.urihttp://hdl.handle.net/11449/70438
dc.language.isoeng
dc.relation.ispartof2007 Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, DETC2007
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDirect current (dc)
dc.subjectEquation of motion
dc.subjectFunction of time
dc.subjecthorizontal motions
dc.subjectIn between
dc.subjectinternational conferences
dc.subjectInternational designs
dc.subjectLagrange's equations
dc.subjectlarge amplitude vibrations
dc.subjectLimited power supply
dc.subjectMotor rotation
dc.subjectMulti-body system (MBS)
dc.subjectNon ideal sources
dc.subjectNon-linear dynamics
dc.subjectNumerical simulations
dc.subjectPassive control
dc.subjectpoint masses
dc.subjectresonance conditions
dc.subjectshear buildings
dc.subjectSommerfeld effect
dc.subjectSteady states
dc.subjectStep-by-step
dc.subjectSuspended mass
dc.subjectTechnical conferences
dc.subjectArchitectural design
dc.subjectComputer control
dc.subjectComputer networks
dc.subjectComputer simulation
dc.subjectComputers
dc.subjectControl systems
dc.subjectDC motors
dc.subjectDynamical systems
dc.subjectDynamics
dc.subjectElectric machinery
dc.subjectElectric motors
dc.subjectElectric potential
dc.subjectElectroacupuncture
dc.subjectEngineering
dc.subjectEquations of motion
dc.subjectFoundations
dc.subjectFunction evaluation
dc.subjectFunctions
dc.subjectInformation systems
dc.subjectLattice vibrations
dc.subjectLead
dc.subjectMachine design
dc.subjectMathematical models
dc.subjectMechanics
dc.subjectMotors
dc.subjectNonlinear programming
dc.subjectPassive networks
dc.subjectPhotoacoustic effect
dc.subjectRotation
dc.subjectShearing machines
dc.subjectStructural analysis
dc.subjectTechnology
dc.subjectVibrations (mechanical)
dc.subjectVibrators
dc.subjectStructural design
dc.titleA structure excited by a DC motor of limited power supply and controlled by a pendulum like deviceen
dc.typeTrabalho apresentado em evento
dcterms.licensehttp://journaltool.asme.org/Help/AuthorHelp/WebHelp/1903.pdf
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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