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 41 for “"load variations"”.
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Mitigating the Cost, Performance, and Power Overheads Induced by Load Variations in Multicore Cloud Servers
<p>Load variations whether in space or time pose a significant challenge to system designers. These load variations may induce inefficiencies such as load imbalance and over-provisioning, resulting in performance/power/cost overheads. The goal of my research is to mitigate such variation-induced …
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The effects of ship load variations and seastate on hull girder deflection and combat system alignment
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1990.
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Efficiency test of the dust collector on No.6 boiler in the V.P.I. power plant
From the tests run it was observed that load variations have a pronounced effect both on size analysis and concentration of the flyash.
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Wide Range Switched Mode RF Power Amplifiers and their applications
… can work across a wide range of power levels and load impedances with fast response speed while maintaining high efficiency. Such designs would be valuable for many applications including plasma generation and wireless power transfer. We introduce a new wide-range SMPA architecture that provides …
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Simulation of dynamic load effect on power system frequency
This thesis addresses the impact of dynamic load on power system frequency. Rapid dynamic load variations will bring significant impact to the power system in terms of frequency. The thesis is based on three-phase dynamic load (composite based). The objective of this thesis was to analyse the …
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A Hysteresis Model for Reinforced Concrete Space Frame Structures
… subjected to biaxial bending and varying axial load is proposed. The model, identified as the U-model, is based on cross-sectional properties. The U-model combines the Otani's modification of the Clough model and the Ziegler hardening rule of plasticity theory. Other relationships between …
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Simulation of speed control brushless DC motor using gaussian fuzzy logic controller
… is derived. The controller is designed to tracks variations of speed references and stabilizes the output speed during load variations. The effectiveness of the proposed method is verified by develop simulation model in Matlab Simulink software. The simulation results show that the proposed Fuzzy …
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Enhanced wireless power transfer system modeling using reflection theory and magnetic circuit analysis
… identifies peak efficiency points under varying load conditions by combining reflection theory with circuit analysis. Unlike previous models, it adapts to load variations within a 10 Ω tolerance range. The proposed method also optimizes mutual inductance for different power levels and load …
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The Relevance Of Load Following Capability Of Nuclear Power Plant For The South African Grid
… main focus of this study is to evaluate whether load following operation can be performed using the existing South African nuclear power plant. Of which, knowing that will assist in determining whether the addition of load following capabilities on the planned nuclear fleet is justifiable or not. …
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Modulated Frequency Multiplier Inverter
… a wide power range despite highly variable load reactances, while also maintaining high efficiency. Previous approaches to this problem, such as switched-mode inverters combined with tunable matching networks provide adequate, albeit bulky, costly, and complex solutions at lower HF …
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Constant-frequency resonant power processors
… control-to-output characteristic independent of load variations and is very easy to implement. Unified closed-form expressions for the steady-state operating conditions are derived. Circuit performances are analyzed through closed-form solutions. Similar analyses are performed for a …
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Experimental sliding mode control of a flexible single link manipulator
… of the design method. The robustness under load variations is also tested. The experimental results compared favorably against the Linear Quadratic Gaussian (LQG) controller under the same load variations. To realize the proposed new controller designs, a novel approach is devised for these …
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Toward Intelligent Power Systems: 5G-Enabled Hybrid Control of Distributed Energy Resources in Microgrids and Virtual Power Plants
… under diverse operational scenarios, including load variations, grid connection, network disconnection, resynchronization, and parallel inverter power-sharing. Feasibility tests conducted over Bell’s 5G network in Canada show end-to-end communication latency in the range of 40–250 ms, which is …
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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
… changing prosthetic joints, infuenced by load variations, user gait changes, and mechanical wear. Limited experimental validation exists for combining RLS with online LQR adaptation in prosthetic-like systems.</p> <p>To address these limitations, an RLS-driven Adaptive LQR framework was …
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Controllable Transformation Matching Networks for Efficient RF Impedance Matching
… networks to transform the variable plasma load impedance to a fixed impedance suitable for most rf power amplifiers. Plasma applications require fast tuning speed with precise control from the matching networks while operating at a high frequency range. However, it is difficult to meet the …
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DC analysis of quasi-resonant buck and forward converters including effects of parasitic elements
… gain in full-wave mode is less sensitive to load variations than other resonant forward topologies that only operate in half-wave mode.
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Toward distributed control for autonomous electrical energy systems
… control (E-AGC) for systems with highly dynamic load variations, including effects of intermittent renewable generation. Further work is needed to fully generalize this approach for control design of large-scale EES. In addition to theoretical results, we also report the results of several …
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Advanced dynamic response improvement methods for dc-dc power electronic converters
… in response to their instantaneous electric load variations. This requirement is becoming more and more stringent as the operating voltage of such loads is continuously reducing. This voltage level reduction has reached a point where conventional control approaches can barely meet the dynamic …
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Design of DC-DC converters using Tunable Piezoelectric Transformers
… TPT to understand the effect of control terminal loading on the circuit performance. Based on this analysis, a variable capacitor connected across the control terminal is proposed to regulate the output voltage for line and load variations is suggested. The concept of ‘tunability’ in a TPT is …
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Multiple Streams Synchronization in Collaborative Multimedia Systems
… streams that work correctly in the presence of load variations. First, we propose a mechanism for assigning a correct synchronization specification to media units that takes into account the workload variation at the sender; although this issue is critical, it has been largely ignored in …
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