Governing System
Mostrando 13-24 de 162 artigos, teses e dissertações.
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13. Control of a Support Excitation Smart Beam Subjected to a Follower Force with Piezoelectric Sensors/Actuators
Abstract In this paper, an active control is used to suppress the flutter vibration of a support excitation beam subjected to a follower force, using piezoelectric sensors/actuators. The beam is fixed to a motion support from one end and the other end is subjected to a follower force. The governing equations of motion are derived based on the generalized fun
Lat. Am. j. solids struct.. Publicado em: 2015-12
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14. Tracking control of a planar five-link bipedal walking system with point contact, considering self-impact joint constraint by adaptive neural network method
AbstractIn order to achieve the practical characteristics of natural bipedal walking, a key feature is to realize "the straight knee state of walking" during stance and swing motions. Considering a straight knee necessitates that the shank link of each leg not to undergo the rotation angles which are greater than that of the thigh link. For this purpose, var
Lat. Am. j. solids struct.. Publicado em: 2015-06
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15. Vibration suppression of a rotating flexible cantilever pipe conveying fluid using piezoelectric layers
AbstractIn this study, the governing equations of a rotating cantilever pipe conveying fluid are derived and the longitudinal and lateral induced vibrations are controlled. The pipe considered as an Euler Bernoulli beam with tip mass which piezoelectric layers attached both side of it as sensors and actuators. The follower force due to the fluid discharge ca
Lat. Am. j. solids struct.. Publicado em: 2015-06
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16. Modeling the pull-in instability of the CNT-based probe/actuator under the Coulomb force and the van der Waals attraction
Carbon nano-tube (CNT) is applied to fabricate nano-probes, nano-switches, nano-sensors and nano- actuators. In this paper, a continuum model is employed to obtain the nonlinear constitutive equation and pull-in instability of CNT-based probe/actuators, which includes the effect of electrostatic interaction and intermolecular van der Waals (vdW) forces. The
Lat. Am. j. solids struct.. Publicado em: 2014-12
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17. Dynamic pull-in instability of geometrically nonlinear actuated micro-beams based on the modified couple stress theory
This paper investigates the dynamic pull-in instability of vibrating micro-beams undergoing large deflection under electrosatically actuation. The governing equation of motion is derived based on the modified couple stress theory. Homotopy Perturbation Method is employed to produce the high accuracy approximate solution as well as the second-order frequency-
Lat. Am. j. solids struct.. Publicado em: 2014-10
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18. Application of nonlocal elasticity and DQM to dynamic analysis of curved nanobeams
In this paper, a new numerical technique, the differential quadrature method (DQM) has been developed for dynamic analysis of the nanobeams in the polar coordinate system. DQ approximation of the required partial derivatives is given by a weighted linear sum of the function values at all grid points. A semicircular arch with small-scale effects is investigat
Lat. Am. j. solids struct.. Publicado em: 2014-10
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19. Los valores compartidos: una reinterpretación política del confucianismo en Singapur
This research studies the political process conducted by the government of People's Action Party (PAP) of Singapore during the eighties and nineties of the XXth century to conform a project for the national ideology to legitimize the political system formed in that country after its independence. The project for the national ideology was called as "Shared Va
Rev. Sociol. Polit.. Publicado em: 2014-09
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20. Study on TVD parameters sensitivity of a crankshaft using multiple scale and state space method considering quadratic and cubic non-linearities
In this paper the effect of quadratic and cubic non-linearities of the system consisting of the crankshaft and torsional vibration damper (TVD) is taken into account. TVD consists of non-linear elastomer material used for controlling the torsional vibration of crankshaft. The method of multiple scales is used to solve the governing equations of the system. M
Lat. Am. j. solids struct.. Publicado em: 2014
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21. Modeling the size dependent pull-in instability of beam-type NEMS using strain gradient theory
It is well recognized that size dependency of materials characteristics, i.e. size-effect, often plays a significant role in the performance of nano-structures. Herein, strain gradient continuum theory is employed to investigate the size dependent pull-in instability of beam-type nano-electromechanical systems (NEMS). Two most common types of NEMS i.e. nano-
Lat. Am. j. solids struct.. Publicado em: 2014
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22. Bases políticas das transferências intergovernamentais no Brasil (1985-2004)
The politics of intergovernmental transfers in Brazil. This article examines the political economy of public resources distribution in Brazil's federal system in 1985-2004. We propose an empirical exercise to analyze how the country's federal governments deal with the tradeoff between the provision of material wellbeing to sub-national governments (the state
Brazil. J. Polit. Econ.. Publicado em: 2013-12
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23. Analytical and Mathematical Modeling and Optimization of Fiber Metal Laminates (FMLs) subjected to low-velocity impact via combined response surface regression and zero-One programming
This paper presents analytical and mathematical modeling and optimization of the dynamic behavior of the fiber metal laminates (FMLs) subjected to low-velocity impact. The deflection to thickness (w/h) ratio has been identified through the governing equations of the plate that are solved using the first-order shear deformation theory as well as the Fourier s
Lat. Am. j. solids struct.. Publicado em: 2013-03
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24. Irregular vibrations in multi-mass discrete-continuous systems torsionally deformed
In the paper irregular vibrations of discrete-continuous systems consisting of an arbitrary number rigid bodies connected by shafts torsionally deformed are studied. In the systems a local nonlinearity described by the polynomial of the third degree is introduced. It is assumed that the characteristic of the local nonlinearity is of a hard type. Governing eq
Lat. Am. j. solids struct.. Publicado em: 2013-01