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.
Results
Showing 1 to 20 of 29 for “"Real-Time Estimation"”.
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Reduced-order modeling for ensemble real-time estimation and control
… have created the possibility of providing real time measurements of subsurface conditions. These measurements can be used to reduce uncertainty in the description of subsurface conditions, and combining uncertainty quantification and control optimization leads to improved management of …
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Multiple model based real time estimation of wheel-rail contact conditions
… of a unique, vehicle based technique forthe real-time estimation of the contact conditions using multiple models to representvariations in the adhesion level and different contact conditions. The proposed solutionexploits the fact that the dynamic behaviour of a railway vehicle is strongly …
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Real-Time Estimation of Traffic Stream Density using Connected Vehicle Data
… measurement. In this dissertation, several estimation approaches are developed to estimate the traffic stream density on signalized approaches using connected vehicle (CV) data. First, the dissertation introduces a novel variable estimation interval that allows for higher estimation …
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Real Time Estimation, Quantization, And Remote Control Of Permanent Magnet Dc Motors
<p>Establishing real-time models for electric motors is of importance for capturing authentic dynamic behavior of the motors to improve control performance, enhance robustness, and support diagnosis. Quantized sensors are less expensive and remote controlled motors mandate signal quantization. Such …
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Applications of deep learning and computer vision in large scale quantification of tree canopy cover and real-time estimation of street parking
… techniques have enabled effective learning and estimation of high-level attributes and meaningful features from large digital datasets of images and videos. In my thesis, I explore the potential of applying deep learning to image and video data to quantify urban tree cover and street parking …
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Target tracking onboard an autonomous underwater vehicle : determining optimal towed array heading in an anisotropic noise field
… target tracking, we conduct an onboard estimation of the horizontal noise directionality in the real-time processing suite of an autonomous underwater vehicle (AUV) towing a horizontal line array. The estimation of the noise directionality is a precursor to another adaptive behavior: …
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An Iterative Technique for Instrument Transformer Calibration and Line Parameter Estimation with Synchrophasor Measurements
… introduction of synchrophasor technology to the realm of power systems has presented a myriad of novel approaches to age-old problems. In this thesis, the questions of instrument transformer calibration and transmission line parameter estimation have been examined. With synchrophasors offering …
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Continuum modeling of the deceleration transient state in stochastic traffic flow
… may not be sufficient in applications such as real-time estimation and prediction of traffic flow conditions. In previous studies, the issue of physical relevance has received little attention in efforts to introduce a stochastic component into deterministic equilibrium-based traffic models. In …
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The cost of breeding in the winter versus the summer in an opportunistic, northtemperate songbird, the red crossbill (Loxia curvirostra)
… to detect heart rate, however, allow for real-time estimation of energy expense in free-living, behaving animals. Red crossbills live at northern latitudes year-round and breed opportunistically throughout much of the year. They therefore offer a unique opportunity to examine the …
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Personalized machine learning for facial expression analysis
… are the effects of model personalization on the estimation of valence and arousal from faces? (2) What is the amount of (un)supervised data needed to reach a target performance? Models produced in this research provide the foundation of a novel tool for personalized real-time estimation of target …
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A Technique For Estimating System-Wide Phasors In Real Time
… of Synchronized Phasor Measurement techniques in real time estimation of power system phasors. The WSCC System is a very large power system network constituted by a number of electric utilities and power companies. The system was analyzed and equivalents developed to suit the purpose of this …
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Machine Learning and Biomechanical Sensing Toward Real-Time In-The-Loop Gait and Joint Health Optimization
… capture subcutaneous physiological dynamics in real-time. This challenge hinders progress across domains ranging from exoskeleton control to clinical monitoring in populations with movement or inflammatory disorders. This work aimed to expand corresponding biomechanical sensing capabilities by …
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A bayesian approach to wireless location problems
Several approaches for indoor location estimation in wireless networks are proposed. We explore non-hierarchical and hierarchical Bayesian graphical models that use prior knowledge about physics of signal propagation, as well as different modifications of Bayesian bivariate spline models. The …
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Modeling of Ethanol Metabolism and Transdermal Transport
… from previous research has shown significant time delays between alcohol ingestion and detection at the skin which makes real time estimation of blood alcohol concentration via skin measurement difficult. Using a validated model we studied the effects that body weight, metabolic rate and …
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A new dynamic mode for fast imaging in atomic force microscopes
… the challenges of high-bandwidth imaging and real-time estimation of sample properties in an atomic force microscope (AFM). Atomic force microscopy has enabled high-resolution nanoscale imaging and manipulation of mechanical, biological and chemical properties of samples at atomic scales. …
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Preemptive variation reduction in biologic drug substance manufacturing
… the biomanufacturing process and enabling real-time monitoring and estimation of critical parameters, organizations can reduce emerging variations in their manufacturing process by being able to identify, predict, and mitigate emerging issues before they become disruptive.To validate this …
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Single-Phase, Single-Switch, Sensorless Switched Reluctance Motor Drive Utilizing a Minimal Artificial Neural Net
… neurons and several layers which impedes their real time implementation in embedded sys- tems. Real time estimation at high speeds using these ANNs is diffcult due to the high number of operations required to process the ANN controller. An insuffcient availability of time between two sampling …
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Sensing and Predicting Urban Rail Platform Crowding Using Emerging Data Sources
… occupancies 15–60 minutes ahead of time. Our results show significant improvements over a WMATA-internal baseline while providing a robust data preparation and prediction pipeline. Subsequently, we explore integrating platform-level CCTV data to overcome the lack of real-time …
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Aircraft System Identification Approach for Control Surface Fault Diagnosis
… research aircraft. The work considers several real-time system identification methods to estimate changes in control effectiveness and provide fault information to a fault-tolerant control allocation framework. A baseline aero-propulsive model for an experimental aircraft was developed from …
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Control System for Outdoor Use of Powered Portable Ankle-Foot Orthosis
… the gait cycle. This allows for the precise, real-time estimation of foot orientation and tibia angle. The second part of the thesis presents a numerical evaluation of the control algorithms through simulation studies and self-collected data. The performance and adaptability of the system are …
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