Rotational Degrees Of Freedom
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Design of Attitude Control Servomechanisms with Fluid Ring and CMG for Rigid Satellite
ABSTRACT: Satellites cover a wide range of space missions as remote sensing. Accomplishment of the mission depends on satellite's stability maintenance and direction. The main task of the attitude control system is to provide stability to the satellite against external disturbances. Such perturbations are caused due to aerodynamic drag, solar radiation and m
J. Aerosp. Technol. Manag.. Publicado em: 08/11/2018
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2. A C1 Beam Element Based on Overhauser Interpolation
Abstract A new C1 element is proposed to model Euler-Bernoulli beams in one and two-dimensional problems. The proposed formulation assures C1 continuity requirement without the use of rotational degrees of freedom, used in traditional elements, through the use of an Overhauser interpolation scheme for bending displacements. The principle of virtual displacem
Lat. Am. j. solids struct.. Publicado em: 2017-01
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3. Hyper-redundant robots with modules of parallel arquitecture. / Robô hiper-redundante com módulos de arquitetura paralela.
This research studies hyper-redundant robots focusing on the kinematics analysis. A hyper-redundant robot was developed based on modules of parallel architecture and binary actuators. Each module has three degrees-of-freedom, two rotational degrees of freedom with perpendicular axis and one translational degree of freedom. After searching for parallel struct
Publicado em: 2007
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4. Techniques for the estimation of angular FRFs in modal testing with applications to beam type structures / Técnicas para estimativa de FRFS angulares em análise modal experimental com aplicações a estruturas do tipo viga
Este trabalho realiza uma investigação sobre técnicas experimentais para a determinação de Funções de Resposta em Freqüência (FRFs) angulares com aplicações em estruturas do tipo viga. Estas FRFs são definidas considerando-se como variável de saída o movimento angular (deslocamento, velocidade ou aceleração) exibido pela estrutura sob estudo
Publicado em: 2003
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5. Planejamento de trajetorias de um manipulador robotico usando redes neurais artificiais
The objective of this dissertation is to present the trajectory control of a SCARA type manipulator within a working volume defined by the cinematic equations. The determination of the trajectory inside the working volume is obtained using an artificial neural network ofthe type multilayer perceptron. The initial simulate, the manipulator movements between t
Publicado em: 2002
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6. Use of free formulation to the development of a membrane element with rotational degrees of freedom / Utilização da formulação livre para desenvolvimento de um elemento de membrana com liberdades rotacionais
In this work the formulation of a membrane finite element with rotational degrees of freedom and its implementation to a finite element computational system is presented. The development is based on the free formulation of BERGAN &NYGARD (1984) that produce a simple and efficient element. Fundamental aspects of the free formulation, of the element evaluation
Publicado em: 1996
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7. DEVELOPMENT OF A THREE-DIMENSIONAL BEAM ELEMENT WITH REDUCED DEGREES-OF-FREEDOM / DESENVOLVIMENTO DE UM ELEMENTO DE VIGA TRIDIMENSIONAL COM NÚMERO REDUZIDO DE GRAUS-DE-LIBERDADE
Throughout this thesis the formulation of the mathematical modelo f a general tri-dimensional beam element with reduced degrees-of-freedom is presented. The element is a four node displacement based finite element with three linear and one locally referrer rotational displacements at each node. Bending effects are taken into account through the imposition of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/04/1984
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8. Subnanosecond motions of tryptophan residues in proteins
The dynamics of protein molecules in the subnanosecond and nanosecond time range were investigated by time-resolved fluorescence polarization spectroscopy. Synchrotron radiation from a storage ring was used as a pulsed light source to excite the single tryptophan residue in a series of proteins. The full width at half maximum of the detected light pulse was
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9. New mechanics of traumatic brain injury
The prediction and prevention of traumatic brain injury is a very important aspect of preventive medical science. This paper proposes a new coupled loading-rate hypothesis for the traumatic brain injury (TBI), which states that the main cause of the TBI is an external Euclidean jolt, or SE(3)-jolt, an impulsive loading that strikes the head in several couple
Springer Netherlands.
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10. Modeling of polypeptide chains as C alpha chains, C alpha chains with C beta, and C alpha chains with ellipsoidal lateral chains.
In an effort to reduce the number of degrees of freedom necessary to describe a polypeptide chain we analyze the statistical behavior of polypeptide chains when represented as C alpha chains, C alpha chains with C beta atoms attached, and C alpha chains with rotational ellipsoids as models of side chains. A statistical analysis on a restricted data set of 75
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11. Binding of buried structural water increases the flexibility of proteins
Water deeply buried in proteins is considered to be an integral part of the folded structure. Such structural water molecules make strong H bonds with polar groups of the surrounding protein and therefore are believed to tighten the protein matrix. Surprisingly, our computational analysis of the binding of a buried water molecule to bovine pancreatic trypsin
The National Academy of Sciences.
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12. Protein unfolding: Rigidity lost
We relate the unfolding of a protein to its loss of structural stability or rigidity. Rigidity and flexibility are well defined concepts in mathematics and physics, with a body of theorems and algorithms that have been applied successfully to materials, allowing the constraints in a network to be related to its deformability. Here we simulate the weakening o
The National Academy of Sciences.