Pendulum Systems
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Simple but accurate periodic solutions for the nonlinear pendulum equation
Abstract Despite its elementary structure, the simple pendulum oscillations are described by a nonlinear differential equation whose exact solution for the angular displacement from vertical as a function of time cannot be expressed in terms of an elementary function, so either a numerical treatment or some analytical approximation is ultimately demanded. Su
Rev. Bras. Ensino Fís.. Publicado em: 21/09/2018
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2. Frozen-to-jamming-to-fluid Transition of Weakly Sheared Granular Systems by Low-frequency Mechanical Spectroscopy
Granular matter usually displays frozen, jamming and fluidized states when submitted to an external vibration with increasing intensity. The dissipation properties of granular systems with three different millimeter-size glass grains (0.1, 0.5 and 1.9 mm) have been investigated by a modified low-frequency inverted torsion pendulum under a shear strain and an
Mat. Res.. Publicado em: 10/07/2018
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3. Experimental Study of the Compressive Strength of Multi-Coat Renders
Mortar compressive strength is a standard requirement and should be tested on stand-ardized specimens with a 40 mm square cross section. However, these specimens with only one type of mortar (base-coat layer) do not represent the render traditionally ap-plied to façades since that must consist of at least two layers (base coat and top coat, with different f
Mat. Res.. Publicado em: 13/07/2017
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4. Predição e identificação de danos internos em batatas por meio do biospeckle laser / Prediction and identification of potatoes in internal damagethrough the laser biospeckle
Food damages due to mechanical impacts at post harvest different phases are one of the biggest issues faced by food industry. In potatoes, productivity decrease due to impacts and physical damages can get to 40% during processing, storage, transportation and commercialization phases. Intern injuries, or bruising, are one of the biggest factors losses at pota
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2011
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5. Simulação da dinâmica lateral de um elevador por meio de sistemas pendulares representados através do método de espaço de estados / State space representation of the lateral dynamic of an elevator modeled by pendular systems
Este trabalho aborda a modelagem do comportamento dinâmico do movimento lateral de elevadores por meio de pêndulos, para fins de desenvolvimento de algoritmos de controle de sistemas de suspensão ativa em elevadores de alto desempenho. O objetivo é avaliar o grau de validade da representação de elevadores por pêndulos simples, comumente usada na liter
Publicado em: 2011
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6. PROJETO E CONTROLE ROBUSTO DE UM TRANSPORTADOR PESSOAL ROBÓTICO AUTO EQUILIBRANTE / DESIGN AND ROBUST CONTROL OF A SELF-BALANCING PERSONAL ROBOTIC TRANSPORTER VEHICLE
A Self Balancing Personal Transporter (SBPT) is a robotic platform with two wheels that functions from the balance of the individual who uses it, resembling the operation of classic inverted pendulum. In this thesis, a SBPT is designed, built and controlled. Among the features from the developed SBPT, it can be mentioned: relatively high speeds, agility, com
Publicado em: 2010
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7. Active system of auto-stabilization for suspended vehicles. / Sistema ativo de auto-estabilização para veículos suspensos.
During the last decades, many researches and studies have been done about suspended vehicles such as chair lifts, cable cars, carrying and assemblies of parts in the industry, etc. Suspended vehicles behave like a pendulum and they are susceptible to the action of external forces which cause oscillations and unwanted swing at the vehicle that may affect func
Publicado em: 2009
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8. Application of evolutionary controller to a pendulum driver / Aplicação de controlador evolutico a pendulo servo acionado
O uso de técnicas evolutivas empregando algoritmos genéticos na obtenção de projetos de circuitos eletrônicos analógicos e digitais já é fato e vem sendo estudado a alguns anos. Neste contexto, o objetivo deste trabalho foi o de implementar em hardware reconfigurável a proposta de um controlador para pendulo não-linear amortecido, obtido através d
Publicado em: 2008
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9. Motor Control Modeling to Entropy Generation Minimization in Peripheral Mechanical Processes / Modelagem do controle motor para minimização de geração de entropia em processos mecânicos periféricos
Objectives: Classical studies showed that the transition among gait patterns, in vertebrate locomotion, occur when there is an increase in energetic demand. Since the muscular movement is performed under central nervous system control, it is this one that determines the gait pattern in the end. Therefore, this structure is able to translate mechanical events
Publicado em: 2008
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10. Hardware evolutivo aplicado a geração automatica de controladores para servo-mecanismos / Evolvable hardware applied to automatic design of servomecanisms
In the last decade evolutionary algorithms application in electronic circuits synthesis have been intensively investigated, starting a new research area called Evolvable Hardware. This thesis considers the use of Evolvable Hardware as a tool for automatic design of circuits applied to the control of a nonlinear damped pendulum. Initially a study on the use o
Publicado em: 2007
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11. VIBRATION CONTROL OF SLENDER TOWERS WITH A PENDULUM ABSORBER / ABSORSOR PENDULAR PARA CONTROLE DE VIBRAÇÕES DE TORRES ESBELTAS
In the present work the performance of a pendulum absorber in the vibration control of tall and slender towers, caused by dynamic loads, such as, environmental loads, is studied in detail. Due to the possibility of large amplitude oscillations, the non-linearity of the pendulum is considered in the modeling of the problem. The main objective of this research
Publicado em: 2006
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12. Extração de conhecimento a partir de redes reurais recorrentes / knowledge extraction from recurrent neural networks
ln this work a method ofknowledge extraction from Recurrent Neural Network is proposed. Express formally the knowledge stored inside an Artificial Neural Network is a great challenge, because such knowledge has to be reformulated and presented by simple and understandable means. Three symbolic formats are presented for the representation of this knowledge: F
Publicado em: 2004