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 43 for “"Tracking Accuracy"”.
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Low power, reduced complexity filtering and improved tracking accuracy for GNSS
… does not deleteriously affect the positional accuracy. However, in the case where an IIR filter was deployed in a GLObalnaya NAvigatsionnaya Sputnikovaya Sistema (GLONASS) receiver, the pseudorange measurements of the receiver varied by up to 200 metres. The work undertaken proposes various …
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Calibration system for the Tracking Accuracy Measurement System (TAMS) using differential GPS (dGPS)
The accuracy of a combined Optronics and Radar Tracker system is investigated in this dissertation. The Tracking Accuracy Measurement (TAMS) was designed to exploit the positional accuracy of differential Global Positioning System (dGPS) technology to qualify a 60km range X-band combined Optronic …
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Effect of friction and control parameters on the tracking accuracy of a target seeker
The tracking accuracy of a missile target seeker depends on many variables. For a target seeker using a gimbaled platform, an important variable is the friction induced by the preloaded bearings, and by the short wires which connect the target detector with the rest of the seeker's electronics. …
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Improvement of position and orientation tracking accuracy by fusing HTC Vive trackers and Inertia Measurement Units
Position tracking systems have been used for calibration, error compensation and navigation of robots to enable higher precision machining, assembly, or control. Laser trackers are the most common position tracking system in the aerospace industry despite the high price. They can track minute …
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Are you coming on to me? Accuracy and bias in couples' perceptions of sexual advances
… partner used those behaviours, whether this tracking accuracy and bias were moderated by individual differences, and whether tracking accuracy and bias predicted relational outcomes. Results revealed strong evidence for tracking accuracy, and mixed results for bias. In addition, there was …
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Assessment of Bidirectional Compatibility between a Novel Magnetic Tracking System and C-Arm Fluoroscopy
… has been shown to increase procedural accuracy. Attempts to incorporate magnetic tracking systems into fluoroscopy-guided interventions have been met with two main limitations: its tracking accuracy is affected by the presence of the C-arm, and the required placement of the magnetic …
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Muscle fatigue and other factors influencing forearm muscle activity
… flexion and wrist extension contractions on hand-tracking accuracy (Chapter 5) and investigate the underlying central mechanisms that may contribute to accuracy impairments (Chapter 6). In Part 1, we identified that the muscle activity of the wrist flexors was highly sensitive to changes in …
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Online Parameter Adaptation of LQR Controllers via RLS for Prosthetic Joint Control: Experimental Validation on a Quanser Qube-Servo 2 Platform
… which limits adaptability and results in reduced tracking accuracy, poor robustness, and loss of optimal performance when applied to dynamically changing prosthetic joints, infuenced by load variations, user gait changes, and mechanical wear. Limited experimental validation exists for combining …
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Influencing the Allocation of Attentional Resources in Tracking: Evidence for a Combined Parallel and Serial Mechanism
… that some serial mechanism is involved in the tracking process, suggesting that there are shifts of attention from object to object in order to successfully track (Oksama & Hyönä, 2008). Subsequent research has demonstrated that changes in trajectory can attract attention (Howard & Holcombe, …
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Electromagnetic tracking and steering for catheter navigation
… use of electromagnetics for both steering and tracking of medical instruments in minimally invasive surgeries. The end application is virtual navigation of the lung for biopsy of early stage cancer nodules. Navigation to the peripheral regions of the lung is difficult due to physical dimensions …
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Motion design, control and implementation in robot manipulators
… dynamic performance of robots, specifically the tracking accuracy and motion duration, is influenced by both the nominal motion profile and the feedback control method employed. Three schemes are developed and experimentally tested to tackle the improvement of dynamic performance, in the absence …
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Investigation of the Potential of Low Cost Position Tracking Using Permanent Magnets
… such as ultrasound. Permanent magnet based tracking systems potentially offer adequate tracking accuracy and workspace size for limited clinical adoption. This thesis investigates the development of such a tracking system, in order to facilitate future work in developing this technology. …
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Visual tracking of highly articulated objects using massively parallel processors
… analysis by synthesis approach to this difficult tracking problem. We attempt to overcome the vast amount of computation required by implementing the algorithm on commodity GPUs. We also collect a lengthy sequence of hand motions from five cameras in order to train and test our algorithm. We show …
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Object understanding in generalized video segmentation
… based on ‘assignment-space’ that improves tracking accuracy and enriches spatial object proposals temporally. We then develop CAROQ, an approach to generate spatio-temporally rich object proposals to unify closed-world video segmentation and seamlessly address tracking. Finally, we present …
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Three-dimensional displays for commercial aircraft: A theoretical and empirical evaluation
… view. Performance measures include flight path tracking accuracy during routine flight and during events designed to precipitate the loss of situational awareness, accuracies and response times to three different judgment events designed to evaluate the applicability of the Compatibility …
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Design and control of microsatellite clusters for tracking missions
Space-based tracking missions are an emerging interest that could be accomplished using a cluster of microsatellites. This thesis addresses the design of microsatellite clusters to accurately track a target in a probabilistic suborbital occupancy corridor by pursuing the following: orbit …
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Implementation of dithering digital ripple correlation control for photovoltaic maximum power point tracking with windowed sensing
… method for rapid and precise maximum power point tracking in photovoltaic applications using dithered PWM control. Constraints imposed by efficiency, cost and component size limit the available PWM resolution of a power converter, and may in turn limit the MPP tracking efficiency of the …
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Ultrawideband Indoor Location And Tracking System
… to demonstrate an indoor intruder location and tracking system with UltraWideBand (UWB) technology and use data compression and Constant False Alarm Rate (CFAR) techniques to improve the performance of the location system. Reliable and accurate indoor positioning requires a local replacement for …
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Resource-Aware Distributed Particle Filtering for Cluster-Based Object Tracking in Wireless Camera Networks
… we consider the problem of real-time object tracking with a WCN. Existing object tracking methods designed for multi-camera systems do not take into account the unique constraints of WCNs. Specifically, an effective object tracking system for WCNs must anticipate unreliable network …
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Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets
… (HRR) profiles are often used to improve tracking accuracy in range and to allow the radar system to produce an image of an object. This work focuses on the use of HRR profiles generated using a sub-class of HRR techniques termed hopped frequency and stepped frequency waveforms. These …
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