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 18 of 18 for “"position detection"”.
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Close Formation Flight Missions Using Vision-Based Position Detection System
… flight tests demonstrate the capabilities of detection and tracking by providing a low cost, compact size and low weight solution for the problem of estimating the location of other cooperative or non-cooperative flying vehicles within a formation architecture.</p>
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Floating coil position detection system for the Levitated Dipole Experiment
… act requires a feedback mechanism to control the position of the ring in the vacuum vessel. This thesis presents a design for a position detection system to give position information to the feedback controller and digital filters to reduce the effect of noise in the position measurements.
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Toward a demonstration of a Light Force Accelerometer
… on the LFA revealed instabilities in proof mass position detection caused by the asphericity of microspheres. In this thesis, an alternative method for position detection which was less sensitive to shape-irregularities in microspheres was investigated. Results indicated that resolution of …
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Dynamic wind turbine wake trajectory control: Strategies and real-time validation
… building blocks: wake actuation and wake position detection. To emulate the full-scale physics of wake control based on changes in real time, the wind tunnel-based platform HAWKS, equipped with a fully controllable model wind turbine and advanced flow monitoring system, was developed and …
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A Design and Fabrication Pipeline for Integrating Rotary Encoders into 3D Printed Mechanisms
… MechSense encoders report on their angular position, direction of rotation, and speed. MechSense encoders utilize capacitive sensing by integrating a floating capacitor into the rotating element and three capacitive sensor patches in the stationary part of the mechanism. Unlike existing …
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On line tracking of moving objects from moving platforms
It is desired to position the end point of a conveyor belt, which carries material removed by a moving pavement trimmer, above the bed of a moving dump truck. The present report describes the analytical design and practical control of a tracking system for positioning the conveyor. Initial tests …
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Combined optical trapping and single molecule fluorescence to study the force-dependent binding kinetics between filamentous actin and its partners
… of the experimental equipment. The results show position detection capabilities with a resolution of 5 nm. Also, the trap stiffness recorded was in the order of 0.05 pN/nm. With the combination of position and trap stiffness, the force resolution of the instrument is about 0.25 pN. Also, a …
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Real-time spatial-phase-locked electron-beam lithography
… nanometer level by directly referencing the beam position via a global-fiducial grid placed on the substrate, and providing feedback corrections to the beam position. SPLEBL has several different modes of operation, and it can be applied to both scanning electron-beam lithography (SEBL) and …
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Digital Generator Control Unit for Synchronous Brushless Generator
… model-based characteristics. Sensorless rotor position detection was used to finish Park transformation. DSP+FPGA based controller hardware was developed in the lab. A set of hardware was designed to implement the control algorithms. VHDL-based software was developed for FPGA, which is working …
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Mechanical Properties of Individual Molecules : An Interface between the Structure and the Function of the Molecules
Optical tweezers with a 3D position detection were used to investigate the mechanical properties of individual molecules. The molecular receptor-ligand pair of avidin and biotin was used as a model system to establish our technique. Optical tweezers created the possibility to position the …
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Development of a light force accelerometer
… focusing light scattered by the proof mass on a position-sensitive photodetector. A simple model including laser relative intensity noise and shot noise from the measurement of the trapping beam powers estimates that the light force accelerometer could be capable of achieving a sensitivity of < …
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SENSORLESS CONTROL OF BRUSHLESS PERMANENT-MAGNET MACHINES FOR POWER TOOL APPLICATION
… Although, there exists challenges to develop position-sensorless based vector control of PMSM operating in wide speed range covering both constant-torque and constant-power regions. The research objective is to maintain and improve its control robustness and adaptability to variations of …
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Development of control algorithm for a new 12s-6p single phase field excited flux switching motor
… on field oriented control (FOC) principle. For position detection, algorithms merely need a basic infrared transceiver sensor. Bipolar DC signal algorithm is based on changing the polarity of armature DC voltage on the detection of zero rotor position. On the other hand, FOC algorithm involves …
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New Sensorless Permanent Magnet Synchronous Motor Drive
… techniques have been widely used to detect rotor position and speed, especially during the starting and low-speed operations. Among these techniques, pulsating high-frequency signal injection (PHFSI) stands out as a commonly used technique in various industrial applications. However, a significant …
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Vision systems in agriculture – Lagrangian particle tracking and field robotics
… variance due to the noise in particle position detection. A long short-term memory network is trained by synthetic trajectories to predict particles' state in a Burgers vortex. Compared to the baseline methods reported in literature, our model results in lower root mean errors for …
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Smart Environment Based On Real-Time Human Position Tracking For Remote Presence And Collaboration
… data networking system. The prototype of a detection and tracking algorithm to extract the location information was developed using background subtraction in MATLAB. The proposed approach was developed using the combination of background subtraction and neural networks along with heuristics …
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High Performance Sensorless Controlled PMSM Drive with Long Cable for Subsea Applications
… has been addressed by incorporating an Initial Position Detection (IPD) methodology paired with V/Hz and a voltage compensation technique to accurately estimate the rotor's initial position to start the motor without speed reversal. Additionally, the accuracy of the closed-loop sensorless vector …
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Integration of Traffic and Structural Health Monitoring Systems Using A Novel Nothing-On-Road (NOR) Bridge-Weigh-In-Motion (BWIM) System
… is capable of lane identification and truck position detection. The second main issue with the existing BWIM approaches is their limited suitability for simultaneous multiple-vehicle cases on multiple-lane bridges. To address this limitation, in the second phase of this study, a novel BWIM …