Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 832 for “"degree of freedom"”.
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Three Degree-of-Freedom Parallel Actuator Telescope Mount
… contains the design, implementation, and testing of an original, small-scaled two degree-of-freedom telescope mount and a medium-scaled three degree-of-freedom telescope mount inspired by the six degree-of-freedom Stewart-Gough platform telescope mount. The end product is intended to achieve …
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A six-degree of freedom flexural positioning stage
… and open-loop linearity errors less than 0.005% of the full-scale range (100 [mu]m). Measurements over a 100x100x100 [mu]m3 work volume exhibited linearity errors less than 0.20% full-scale. The mechanism's equilateral symmetry and planar geometry restricted thermal drift rates at start-up to …
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Multiple degree of freedom force-state component identification
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Stochastic response of single degree of freedom hysteretic oscillators
During strong ground shaking structures often become inelastic and respond hysteretically. Therefore, in this study some hysteretic models commonly used in seismic structural analysis are studied. In particular the characteristics of a popular endochronic model proposed by Bouc and Wen are examined …
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Analysis of Multiple Degree-of-freedom Oscillatory Aquatic Propulsion
… data were experimentally measured for a two degree-of-freedom fish platform. The fish platform was designed and constructed based on the yellowfin tuna (\textit{Thunnus albacares}) that is known to be both fast and efficient. This work extends the current understanding of oscillatory aquatic …
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Multi-degree of freedom telemanipulation in an unstructured environment
Two approaches to 6-degrees-of-freedom telemanipulation that will accommodate different needs and skills of potential users with congenital amputation, arthrogryposis, muscular dystrophy and cerebral palsy were developed. One method uses scalable movements (i.e. position and orientation), and the …
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The inelastic response of multiple-degree-of-freedom systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Single-degree-of-freedom energy harvesters by stochastic excitation
… criteria for the objective comparison of different classes of single-degree-of-freedom oscillators under stochastic excitation are developed. For each family of oscillators, these objective criteria take into account the maximum possible energy harvested for a given response level, …
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Six degree of freedom optimal trajectories for satellite rendezvous
… positions and orientations using a sequence of impulsive burns. The method makes use of the linear Clohessy-Wiltshire equations to describe translational motions, Euler's equations of rigid body motion for describing the attitude motions, and a sequential quadratic programming optimization …
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Embedding degree of freedom, integrable charges and extended phase space
… published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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Single Degree of Freedom Solid Rotor Velocity Control Induction Drive
This thesis studies a single degree of freedom (DOF), two-pole, three-phase, solid rotor, induction motor operating in closed loop angular velocity control via a proportional-integral (PI) controller applying a constant amplitude, variable frequency drive. The stator consists of six iron teeth, …
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Dynamics of three-degree-of-freedom systems with quadratic nonlinearities
The dynamics of two three-degree-of-freedom systems with quadratic nonlinearities are studied. The first system has two simultaneous two-to-one internal resonances. The second has a combination internal resonance. In both cases the response to a primary resonant excitation of the third mode is …
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Identification of Finite-Degree-of-Freedom Models for Ship Motions
… to the design, control, and economic operation of ships. Many methods are available for studying and predicting ship motions, including time-domain, strip-theory, and system-identification-based predictions. Time-domain and strip-theory predictions suffer from several physical and computational …
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Numerical inverse kinematics for a six-degree-of-freedom manipulator
… gap between theory and practice. The development of general inverse kinematic solution techniques is new, hence few detailed applications of these methods exist. Before methods such as these were available, most commercial manipulators were designed to be geometrically simple, yielding 4th or …
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Simulating Complex Multi-Degree-Of-Freedom Systems and Muscle-Like Actuators
Modeling of biological organisms and developing robotic systems based on these models are complicated and computationally intensive tasks. In order to reduce the amount of time needed to develop such models, computational tools are required which intelligently determine parameters of the physical …
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Dynamic Response of Elastoplastic Two-Degree-of-Freedom Systems to Groundshock
… in DSpace on 2014-12-05T17:37:40Z (GMT). No. of bitstreams: 1 6305066.pdf: 7651275 bytes, checksum: 4655e16a544896158e4a49f306bf1467 (MD5) Previous issue date: 1963
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Bandwidth maximization of a single degree of freedom magnetic suspension system
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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A wireless link to a six degree of freedom inertial tracker
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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SP3X : a six-degree of freedom device for natural model creation
… input device, called SP3X, for the creation of digital models in a semi-immersive environment. The goal of SP3X is to enable novice users to construct geometrically complex three-dimensional objects without extensive training or difficulty. SP3X extends the ideas of mixed reality and partial …
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Simulations of a three degree of freedom brachiating Y-bot robot
Brachiation is a means of locomotion for lightweight apes like gibbons. It involves the animal swinging its arms to gain moment and swing forward. A large amount of research has been done studying a simplified two-link two DOF robot, named "acrobot" by Mark Spong. While the problems of this robot …
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