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 23 for “"online estimation"”.
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Online Estimation of Unknown Parameters for Flexible Spacecraft
… in the flexible dynamics, an onboard estimation through an adaptive controller is performed for these un- knowns while the spacecraft is maneuvered. The controller uses integral concurrent learning (ICL), an adaptive scheme that records inputs and outputs provided by sensors mounted on …
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Online estimation of inter-frequency/system phase biases in precise positioning
… objective of this thesis is the investigation, estimation and correction of these biases in carrier phase observations to achieve better positioning accuracy, reliability and availability through the improvement of its ambiguity resolution. The estimated parameters of the carrier phase IFB and …
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Scalable online estimation with performance guarantees: Application to traffic network monitoring
This work is motivated by the need for scalable online estimation with provable performance in cyber-physical systems, especially in traffic monitoring applications. While model-based traffic estimation has achieved great success via experimental deployments, there are substantial open questions on …
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On the Sample Efficiency of Data-Driven Decision Making
… making across three key settings: offline estimation with batch data, online estimation with sequential data, and interactive decision making as exemplified by multi-armed bandits and reinforcement learning. The first part of the thesis develops novel algorithmic and theoretical tools to …
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Online Raman spectroscopy for bioprocess monitoring
Online monitoring of bioprocesses is essential to expanding the potential of biotechnology. In this thesis, a system to estimate concentrations of chemical components of an Escherichia Coli fermentation growth medium via a remote fiber-optic Raman spectroscopy probe was studied in depth. The system …
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Qos In Cognitive Packet Networks: Adaptive Routing, Flow And Congestion Control
… based on single and multiple QoS constraints. An online estimation of packet loss rate over a path is introduced. We implement and evaluate the adaptive routing scheme in an experimental CPN test-bed. Our experiments support our claims that the users can achieve their desired best-effort QoS …
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Realtime state estimation for contact manipulation
In this thesis, we develop a real-time state estimation system to recover the pose and contact state of an object relative to its environment. The capability to make such estimations is important for a controller to adequately react to uncertainties in a manipulation task. We propose a framework …
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Extending expectation propagation for graphical models
… a window-based EP smoothing algorithm for online estimation on hybrid dynamic Bayesian networks. For an application in wireless communications, window-based EP smoothing achieves estimation accuracy comparable to sequential Monte Carlo methods, but with less than one-tenth computational …
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Maximum likelihood parameter estimation in time series models using sequential Monte Carlo
… best, a procedure generally called parameter estimation. This thesis comprises novel contributions to the methodology on parameter estimation in time series models. Our primary interest is online estimation, although batch estimation is also considered. The developed methods are based on batch …
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Distributed mode estimation through constraint decomposition
… point. Therefore, we want to distribute the online estimation procedure. We introduce here a model-based method that performs robust, online mode estimation of complex, hardware or software systems in a distributed manner. Prior work introduced the concept of probabilistic hierarchical …
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Dynamic temperature estimation of power electronics systems
… proposes a method for accurate temperature estimation of thermally-aware power electronics systems. The duality between electrical systems and thermal systems was considered for thermal modeling. High dimensional thermal models present a challenge for online estimation. RC …
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Methods for Control in Robotic Excavation
… behaviour of earth and fragmented rock highly nonlinear and distributed but also the terrain profiles and properties of excavation sites are uncertain, unstructured, and non-uniform. In this thesis new methods are presented and tested to tackle the current limits in robotic excavation arising …
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Control of a High-speed (<50,000 rpm) Interior Permanent Magnet Synchronous Motor
… fluctuations through lookup-table-based online estimation. Experimental results confirm its effectiveness in improving efficiency with negligible influence on dynamic performance. The thesis also addresses deadtime-induced distortions, proposing a compensation technique for both static …
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Applied Aerial Autonomy for Reliable Indoor Flight and 3D Mapping
… (1) in-flight calibration to improve estimation and control, (2) system identification for wind rejection, and (3) indoor aerial 3D mapping. The dissertation begins with introducing a comprehensive nonlinear filtering framework for UAV parameter estimation, which considers factors such …
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Design Techniques for Efficient Sparse Regression Codes
… construction parameters, and from performing an online estimation of a key AMP parameter instead of using a pre-computed value. Another significant improvement to error rates comes from a novel three-stage decoder which combines SPARCs with an outer code based on low-density parity-check codes. …
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Modeling, Approximation, and Control for a Class of Nonlinear Systems
This work investigates modeling, approximation, estimation, and control for classes of nonlinear systems whose state evolves in space $mathbb{R}^n times H$, where $mathbb{R}^n$ is a n-dimensional Euclidean space and $H$ is a infinite dimensional Hilbert space. Specifically, two classes of nonlinear …
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Sequential nonparametric estimation via Hermite series estimators
… we introduce novel approaches to sequential (online) estimation in both stationary and non-stationary settings based on Hermite series density estimators. In the univariate context we apply Hermite series based distribution function estimators to sequential cumulative distribution function …
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Versatile Inference Algorithms using the Bayes Tree for Robot Navigation
… unknown and uncooperative target objects require online estimation capabilities to acquire target information, such as inertial properties for target motion prediction, in order to enable the subsequent mission phases. This inspection can be formulated as a simultaneous localization and mapping …
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Towards self-organizing wireless networks
… this persistent data stream, low-complexity online estimation and learning techniques are needed. We employ powerful kernel-based adaptive filtering techniques, which are robust to measurement errors. To demonstrate how additional context information can be taken into account, we show, how …
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Control visual basado en características de un sistema articulado. Estimación del jacobiano de la imagen utilizando múltiples vistas
… and this work deals especifically whith the online estimation of the image Jacobian. New algorithms for the estimation of the imagen Jacobian with no iteratives techniques are proposed. These new algorithms are based on the definition of a reliability factor which depends on both movements …
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