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 16 of 16 for “"switching systems"”.
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Scaling Optical Transport using Multi-band Photonic Integrated Switching Systems
L'abstract è presente nell'allegato / the abstract is in the attachment
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Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
… reduce the complexity of the design of the beam switching reflectarray. A simple method has been investigated to develop multi-band elements in this dissertation. In approach to increase the coverage of the operation bands, a six-band reflectarray has been developed with two layers. Each layer …
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Galvanic isolation interface and gate driver for power switching systems in GaN technology [Interfaccia di isolamento galvanico e gate driver per sistemi di commutazione di potenza in tecnologia GaN]
Questa tesi è presentata come adempimento parziale dei requisiti per il conseguimento del titolo di Dottore di Ricerca (PhD) in Ingegneria dei Sistemi, dell’Energia, dell’Informatica e delle Telecomunicazioni presso l’Università degli Studi di Catania. Questo lavoro è stato svolto presso il …
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On the synthesis of switched output feedback controllers for linear, time-invariant systems
The theory of switching systems has seen many advances in the past decade. Its beginnings were founded primarily due to the physical limitations in devices to implement control such as relays, but today there exists a strong interest in the development of switching systems where switching is …
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Asymptotic expansions and stability of hybrid systems with two-time scales
… dissertation, we consider solutions of hybrid systems in which both continuous dynamics and discrete events coexists. One</p> <p>of the main ingredients of our models is the two-time-scale formulation. Under broad conditions, asymptotic expansions are developed for the solutions of the systems …
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Fully Compliant Tensural Bistable Mechanisms (FTBM) with On-Chip Thermal Actuation
… and selected FTBM devices were combined in switching systems with the result-ing Thermomechanical In-plane Microactuators (TIMs) and Amplified Thermomechanical In-plane Microactuators (ATIMs). Successful on-chip actuation was demonstrated. The bistable mechanisms and actuators in this work …
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The evolution of the wireless equipment value chain
Mobile wireless telephone systems require enormous investments in land-based radio, transmission, and switching systems in order to provide the coverage and capacity to efficiently operate a regional or nationwide cellular phone network. This wireless equipment is manufactured by an oligopoly of …
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Experimental and simulation analysis of the jitter response of a single-shot oil switch with a high-K particle suspension
This dissertation investigates oil switching systems to address and reduce the jitter observed in the breakdown electric field strength of a pressurized, oil dielectric. The experimental work is conducted in two phases, the first of which examines the effects of oil chemistry on breakdown …
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Analysis and simulation of dynamics of spacecraft power systems
… of the dynamics of various spacecraft power systems are performed. Systems' dynamics are analyzed for various operating modes, such as the shunt, battery-charge and battery-discharge modes, as well as the transition mode. Computer models using the EASY5 program are developed for the Direct …
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Multi-layer, Low-crosstalk Integrated Optical Switches
… data-intensive applications necessitates optical switching technologies with ultra-low crosstalk, high bandwidth, and nanosecond-scale reconfigurability. This work presents a comprehensive study of 3D Si-SiN-SiN tri-layer optical switches employing switch-and-select (S&S) architectures for …
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On l∞ performance optimization: linear switched systems and systems with cone constraints
The l∞ performance of Linear Time-Invariant (LTI) systems has been one of the corner stones of the robust control theory for over the past 30 years. The l∞ performance has been studied mostly for LTI systems and the scarcity of the results for other types of systems is prominent in this area. This …
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Dynamic control of Escherichia coli central metabolism for improvement of glucaric acid production
… products. A two-phase fermentation with dynamic switching between growth and production modes led to a two-fold improvement in yield and titers of myo-inositol, a precursor of glucaric acid, as well as up to a 42% improvement in titers of glucaric acid directly. The system initially developed …
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Machine Learning Modeling and Robust Model Predictive Control of a Wind Turbine
… for large-scale wind turbines, demand on control systems is significantly increased. Control systems improve the capability of the turbine to efficiently capture wind energy and increase its lifespan. The aim of this research is to develop a comprehensive model-based controller for a wind turbine. …
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A study of column switching liquid chromatography in drug analysis.
… fluids are reviewed. A survey of column switching liquid chromatography techniques revealed the range of column dimensions, the frequency of prior sample pretreatment steps and small injection volumes used and the varied longevity of the columns. The advantages and disadvantages of …
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Contention and congestion minimization in OBS networks
Submitted in partial fulfilment for the Masters in Engineering Degree: Electrical Engineering,, Durban University of Technology, Durban, South Africa, 2017.
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Neuroinspired control strategies with applications to flapping flight
… strategies which are inspired by biological systems. Biological systems, along with sufficiently complicated engineered systems, often have many interacting degrees of freedom and need to excite large-displacement oscillations in order to locomote. Combining these factors can make high-level …