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 34 for “"position sensor"”.
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Design and calibration of an infrared position sensor
… to act as a calibration device for the optical position sensor. Using a coupled electro-mechanical solver, MEMCAD, the resonant modes were simulated and found to be in agreement with the analytical calculations. Upon completion of the device, it was found that motion was not optically …
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Drift compensated inertial position sensor for healthcare patient monitoring
In order to provide more effective health care, especially to the elderly, we must enable the physician to monitor the patient outside of the clinic or hospital. A patient's activities are a critical indicator of his or her well-being, and the physician must have an un-intrusive and inexpensive …
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Analysis and design of a two-axis noncontact position sensor
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Bearingless Slice Motor and 6-DoF Position Sensor for Extracorporeal Pump
… generate significant disturbances in the radial positions and drive the suspension unstable at higher speeds. Therefore, the cogging torque became an important design parameter for this new IPM rotor. Another important part of the thesis is the design and development of a 6 degrees of freedom …
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Development of a Conducting Polymer based Flexible Position Sensor for the Control of Hand Exoskeletons
… hand exoskeletons face an issue regarding to the sensors being employed to determine the finger position. These sensors utilise mechanical designs that require physical movements of rigid components. As such, these sensors are bulky and heavy. They inhibit the usability and portability of the hand …
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Interfacing the Mattel Power Glove to a personal computer and evaluating its capabilities as a three-dimensional position sensor
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Sensorless starting of a brushless D.C. motor
… performance servo drives need absolute rotor position sensors. However, the cost of the position sensor limits the use of brush less DC motors for low performance applications such as automotive and home appliances. A sensorless starting scheme for brushless DC motors is studied in this …
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Automatic sensor fault diagnosis and controller reconfiguration for induction motor drives sensor fault-tolerance
… motor (IM) drives normally incorporates position sensor, phase current sensors, de-link voltage sensor and de-link current sensor. In this research, a sensor fault-diagnosis and fault-tolerance scheme for IM drives is presented that will allow IM drive system to operate properly in the …
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Control and design of a single degree-of-freedom magnetic levitation demonstration
… and noise in both magnet physics and sensor performance can cause instability. This thesis investigates methods of building and controlling a stable, single degree-of-freedom magnetic suspension system that will be robust to changes in ambient conditions. Synchronous detection is a …
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Reuse of hybrid car power systems
… vehicle. A lightweight housing and a rotor position sensor for the motor/generator are constructed to allow it to be used outside of the original bulky transaxle. Field oriented control is implemented on a microcontroller which interfaces with the motor/generator and the Prius inverter …
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Integration of parent-child unmanned air vehicle focusing on control system development
… reintegration is described next. A vision based positioning was developed for the three-axis position sensor for the reintegration. The procedure and the lessons learned during this development are also presented.
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A 3-D display head-set for personalized computing
… optical video disc recorder; a magnetic position sensor, and a depth cue based animation package. This implementation has permitted the creation of a highly interactive three dimensional trainer/simulator . Computer generated controlled images are optically mixed into the surrounding …
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Variable-Speed Switched Reluctance Motor Drives for Low-Cost, High-Volume Applications
… the drive systems are first demonstrated on the position sensor-based speed-control scheme. To make the drive system even more cost-competitive, operation without the position sensor using the novel parameter insensitive sensorless control scheme is proposed and implemented. Concept, analysis, …
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STM Lateral Micropositioning: A Tool for Nanofabrication
… (STM) has been fitted with a lateral micropositioning device in order to allow imaging of surfaces over a range of a few millimeters. The probe is mounted on a stage which uses the principle of piezoelectric inertial translation to produce a controlled stepping motion along two axes. The …
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Restoration of hand and arm function to people with tetraplegia as a result of damage to the spinal cord in the neck through the use of functional electrical stimulation (FES).
… was controlled using an IMU based shoulder position sensor strapped across the contralateral shoulder and did not use a rigid arm splint. This allowed flexibility in electrode position and more people were able to use the system. The device was programmed to perform two hand movements – the …
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A ball-on-beam project kit
… loops to control the angle of the motor and the position of the ball along the beam. A lead compensator was used in each loop and an additional integrator was used in the motor loop to ensure the beam level when supporting the ball. The motor closed loop was designed for a bandwidth of 25 Hz and …
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A methodology for investigation of bowed string performance through measurement of violin bowing technique
… Included in the system are inertial and force sensors, and an electric field position sensor. In order to maximize the applicability of the gesture data provided by this system to related fields of interest, all of the sensors were calibrated in SI units.
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The design and characterization of a microcalorimeter to aid drug discovery
… period. The calorimeter utilizes a novel heat sensor. This heat sensor combines thermal expansion and the dynamic response of an oscillating ribbon to transduce the signal from a heat event. A vacuum chamber improved the sensitivity of the sensor by approximately an order of magnitude by …
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Development of Micro Thermal Actuator with Capactive Sensor
… thermal actuator with integrated capacitive position sensor is also investigated. This new thermal actuator with an integrated capacitive sensor uses the indirect heating thermal actuator discussed in the first part of the thesis to achieve a new integration method. The displacement of the …
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Control of mixing in a nonreactive plane shear layer: I. Open-loop control. II. Feedback control.
… steady temperatures differing by 3°C. The position of the temperature interface between the two streams is measured in the plane of its cross stream Schlieren image by an optical sensor which is placed upstream of the rollup of the primary vortices. Control is effected via an array of …
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