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 33 for “"velocity control"”.
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Single Degree of Freedom Solid Rotor Velocity Control Induction Drive
… 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, evenly spaced and pointing radially inward, wound with 160 turns of copper wire each in a …
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Precession damping and axial velocity control of a lightweight reentry vehicle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Use of attitude stick force cues to improve velocity control system performance.
Thesis: E.A.A., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1972
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On-chip Group and Phase Velocity Control for Classical and Quantum Optical Devices
We present group and phase velocity control for the photonic integrated circuits with an emphasis on two-dimensional photonic crystal devices in this thesis. We describe the theory, analytical and numerical designs, and experimental characterization of silicon nanophotonic devices both in classical …
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Development and performance of a velocity control system for modern combustion-powered scooters
This doctoral thesis covers the development of a velocity-controlled Throttle-by-Wire-System for modern four-stroke 50 cc scooters (Euro 5). Further, the system performance, fuel-saving effect and exhaust optimization was investigated. The European Parliament has adopted major CO2 emission …
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Adaptive control of a four-bar linkage
Three discrete-time adaptive controllers are developed and applied to Four-bar linkage velocity control to reduce the input link velocity fluctuations without compromising the control system velocity transient response. The successful control techniques use the known mechanism kinematics and the …
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Inlet metering pump analysis and experimental evaluation with application for flow control
… volumetric displacement are often used to control flow and pressure in hydraulic systems. The displacement control mechanism in these pumps occupies significant space and accounts for significant cost in the pump design. Fixed displacement pumps have lower cost and a more compact design but …
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Robotic Finger Hardware and Controls Design for Dynamic Piano Playing
… piano requires much higher accelerations and control over velocity rather than position. Proper velocity control allows us to play the piano like professionals, with different music dynamics, allowing us to play soft and hard depending on the emotion of the notes being played. To understand …
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Design and development of an autonomous navigation system for an omni-directional four-wheeled mobile robot
… subsystems: localization, path- following, velocity control, and obstacle detection. The path-following subsystem is responsible for driving the Omnibot along a given path based on feedback about its location relative to its environment. A localization system that uses a combination of …
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Haptic teleoperation of mobile manipulator systems using virtual fixtures.
In order to make the task of controlling Mobile-Manipulator Systems (MMS) simpler, a novel command strategy that uses a single joystick is presented to replace the existing paradigm of using multiple joysticks. To improve efficiency and accuracy, virtual fixtures were implemented with the use of a …
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TIMING CONTROLLER FOR HUMAN-ROBOT OBJECT HANDOVER: IMPLEMENTATION AND EVALUATION
This work compares two controllers for human-robot object handovers. The proposed Timing controller allows users to specify timing parameters for the handover and computes velocity control using Model Predictive Control (MPC). This controller provides feedback if it cannot satisfy those …
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Energy Modeling of Differential Drive Robots
… designing motion planning techniques along with velocity control to reduce the energy consumption. But there has been a lack of a well-defined and a complete energy model that can be used as a cost function for all the optimization algorithms. Having such a model not only provides a platform for …
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Design and control of a planar two-link manipulator for educational use
… of the system are derived and an analysis of velocity control in the xy plane is perform and a control methodology is also presented by which the arm can be stabilized vertically while in its acrobot configuration. A Discussion of tradeoffs relevant to the future design of similar systems is …
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ECoG correlates of visuomotor transformation, neural plasticity, and application to a force-based brain computer interface
… of extracting more independent signals for BCI control within less cortical real-estate. However, most control signals to date, whether within the field of ECoG or any of the more seasoned recording techniques, have translated their control signals to kinematic control parameters: i.e. position …
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Aging and the Effects of Conversation With a Passenger of a Caller on Simulated Driving Performance
… showed better lane keeping and more stable velocity control when drivers conversed with their partner compared to driving only. Drivers also showed faster average velocity under single-task than under dual-task conditions. Older drivers showed evidence of modulation in difficult driving …
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Hierarchical control of complex manufacturing processes
"The need for changing the control objective during the process has been reported in many systems in manufacturing, robotics, etc. However, not many works have been devoted to systematically investigating the proper strategies for these types of problems. In this dissertation, two approaches to …
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Humanoid Robot Soccer Locomotion and Kick Dynamics: Open Loop Walking, Kicking and Morphing into Special Motions on the Nao Robot
… of a central pattern generator to allow for controlled steps with realtime accuracy, and a phase locked loop method to synchronise with the Aldebaran walk so that precise step length control can be activated when required. An open loop trajectory mapping approach is taken to the walk that is …
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Position Sensorless Implementation for a Linear Switched Reluctance Machine
… minimal modifications to the transducer-based controller is investigated for the first time in this study. LSRMs require position feedback for closed-loop control but present a low cost, high energy efficiency alternative for linear actuation due to their rugged construction and single-sided …
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The development of advanced multivariable, linear and nonlinear control design methods with applications to marine vehicles
This thesis primarily concerns control and identification of FPSO and Shuttle Tanker vessels, where nonlinear hydrodynamics raise the associated issue of nonlinear control. A 3-DOF model is presented for investigating Dynamic Positioning control, a problem where directional thrusters maintain ship …
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Digital Control of Levitation
… this problem have been to use a state feedback control system or a simple linear PID compensated control architecture. State feedback is a well-known control technique, but is complicated to implement and can rely on linearization of the system dynamics. The simple PID control structure is very …
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