Tesis sobre el tema "Power management technique"
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Rinaldy. "A technique to incorporate the impacts of demand side management on generation expansion planning". Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40021.
Texto completoAcharya, Subrata. "A dynamic slack management technique for real-time distributed embedded systems". Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/3173.
Texto completoChen, Quan. "Risk Management of Cascading Failure in Composite Reliability of a Deregulated Power System with Microgrids". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52980.
Texto completoPh. D.
Forghani-zadeh, Hassan Pooya. "An Integrated, Lossless, and Accurate Current-Sensing Technique for High-Performance Switching Regulators". Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/16164.
Texto completoYarlagadda, Sriram. "A Battery Management System Using an Active Charge Equalization Yechnique Based on DC-DC Converter Topology". University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1306852610.
Texto completoSomov, Andrey. "Power Management and Power Consumption Optimization Techniques in Wireless Sensor Networks". Doctoral thesis, Università degli studi di Trento, 2009. https://hdl.handle.net/11572/367818.
Texto completoMcGlen, Ryan James. "Advanced thermal management techniques for high power electronics devices". Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533697.
Texto completoDavidson, Jonathan. "Advanced thermal modelling and management techniques to improve power density in next generation power electronics". Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/8419/.
Texto completoWang, Xing. "Market-based transmission congestion management using extended optimal power flow techniques". Thesis, Brunel University, 2001. http://bura.brunel.ac.uk/handle/2438/4804.
Texto completoEriksson, Simon. "System Analysis of Energy-Constrained Quality of Service and Power Management Techniques". Thesis, KTH, Maskinkonstruktion (Inst.), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99457.
Texto completoExamensarbetet är en del av GEODES projektet, Global Energy Optimization for Distributed Embedded Systems. Arbetet hanterar frågor som rör energistyrd Quality of Service , QoS, i inbyggda realtidssystem. Genom den senaste utvecklingen inom området inbyggda system har nya krav introducerats. Speciellt för mobila enheter, där tillkomsten av ny funktionalitet har gått snabbare än utvecklingen av batterikapacitet. För att hantera detta så har en ny aspekt av QoS fått större intresse. Den nya aspekten är att utveckla system med en medveten energikonsumtion. Energimedvetenhet innebär mjukvara som möjliggör förbättringar eller garantier för körtiden av systemet, online eller offline. För beslut online krävs en mjukvarukomponent, en mjukvarumodul för energistyrd QoS. Uppdraget för mjukvarumodulen är att minska strömförbrukningen till kostnaden av lägre prestanda hos systemet. Detta förfarande kallas för att införa kontrollerad system degradering i systemet. Forskningen inom området koncentrerar sig mest på att minska energikonsumtionen för enskilda komponenter. I detta examensarbete så är siktet ställt på att hitta metoder som fungerar på systemnivå. En analys av befintliga ramverk och tekniker för mjukvarukontrollerad energikonsumtion samt energistyrd QoS har genomförts, både på systemnivå och på komponentnivå. Resultatet av analysen presenteras av en specifikation för en energistyrd QoS styrmodul anpassad för kontroll på systemnivå. Ett grundläggande antagande i specifikationen och implementeringen var att systemet i fråga består av komponenter med ställbar energiförbrukning. Dessa komponenter kan ses som fristående oberoende funktionaliteter. Modellantagande visade sig vara komplicerat att tillämpa på verkliga system och ett lösningsförslag vid beroenden mellan komponenter diskuteras. En design och en prototyp Power Manager E , PME, har skapats enligt den specifikation som tagits fram i rapporten. Den hanterar både hårdvara och mjukvara som ställbara komponenter och försöker optimera systemets prestanda under krav på energikonsumtion. Kravet ställs av användaren genom en önskad körtid av systemet. Protoypen är byggd på en i.MX31-plattform från Freescale och är en tilläggsmodul till OSE5.4 Delta från ENEA.
Kreinar, David J. "Energy Management Techniques for Hybrid Electric Unmanned Aircraft Systems". University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton159640308960136.
Texto completoAbuAli, Mohamed. "Techniques for Non-Intrusive Machine Energy and Health Modeling". University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1282056290.
Texto completoLi, Chenxi. "Advanced Load Management Techniques with the Inclusion of Distributed Energy Resources in a Smart Grid". Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17855.
Texto completoWang, Yuchang. "Decision-making techniques for smart grid energy management". Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/28970.
Texto completoGe, Rong. "Theories and Techniques for Efficient High-End Computing". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28863.
Texto completoPh. D.
Žák, Jaromír. "Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů". Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234527.
Texto completoNg, Chik-wai y 吳植偉. "Design techniques of advanced CMOS building blocks for high-performance power management integrated circuits". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45896926.
Texto completoDolan, Michael James. "The application and assessment of active network management techniques for distribution network power flows". Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=17815.
Texto completoShao, Hui. "System design and power management for ultra low energy applications using energy harvesting techniques /". View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20SHAO.
Texto completoSingh, Manmeet. "Switching Power Converter Techniques for Server and Mobile Applications". The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu159486698396321.
Texto completoMallangi, Siva Sai Reddy. "Low-Power Policies Based on DVFS for the MUSEIC v2 System-on-Chip". Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229443.
Texto completoNuförtiden så har multifunktionella bärbara hälsoenheter fått en betydande roll. Dessa enheter drivs vanligtvis av batterier och är därför begränsade av batteritiden (från ett par timmar till ett par veckor beroende på tillämpningen). På senaste tiden har det framkommit att dessa enheter som används vid en fast spänning och frekvens kan användas vid flera spänningar och frekvenser. Genom att byta till lägre spänning och frekvens på grund av effektbehov så kan enheterna få enorma fördelar när det kommer till energibesparing. Dynamisk skalning av spänning och frekvens-tekniker (såkallad Dynamic Voltage and Frequency Scaling, DVFS) har visat sig vara användbara i detta sammanhang för en effektiv avvägning mellan energi och beteende. Hos Imec så använder sig bärbara enheter av den internt utvecklade MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). Systemet är optimerat för effektiv och korrekt insamling, bearbetning och överföring av data från flera (hälso) sensorer. MUSEIC v2 har begränsad möjlighet att styra spänningen och frekvensen dynamiskt. I detta examensarbete undersöker vi hur traditionella DVFS-tekniker kan appliceras på MUSEIC v2. Experiment utfördes för att ta reda på de optimala effektlägena och för att effektivt kunna styra och även skala upp matningsspänningen och frekvensen. Eftersom att ”overhead” skapades vid växling av spänning och frekvens gjordes också en övergångsanalys. Realtidsoch icke-realtidskalkyler genomfördes baserat på dessa tekniker och resultaten sammanställdes och analyserades. I denna process granskades flera toppmoderna schemaläggningsalgoritmer och skalningstekniker för att hitta en lämplig teknik. Genom att använda vår föreslagna skalningsteknikimplementering har vi uppnått 86,95% effektreduktion i jämförelse med det konventionella sättet att MUSEIC v2-chipets processor arbetar med en fast spänning och frekvens. Tekniker som inkluderar lätt sömn och djupt sömnläge studerades och implementerades, vilket testade systemets förmåga att tillgodose DPM-tekniker (Dynamic Power Management) som kan uppnå ännu större fördelar. En ny metod för att genomföra den djupa sömnmekanismen föreslogs också och enligt erhållna resultat så kan den ge upp till 71,54% lägre energiförbrukning jämfört med det traditionella sättet att implementera djupt sömnläge.
Robertson, James George. "New optimal power flow techniques to improve integration of distributed generation in responsive distribution networks". Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10528.
Texto completoGopalakrishnan, Chandramouli. "High Level Techniques for Leakage Power Estimation andOptimization in VLSI ASICs". Scholar Commons, 2003. https://scholarcommons.usf.edu/etd/1376.
Texto completoAdhinarayanan, Vignesh. "Models and Techniques for Green High-Performance Computing". Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/98660.
Texto completoDoctor of Philosophy
Past research in green high-performance computing (HPC) mostly focused on managing the power consumed by general-purpose processors, known as central processing units (CPUs) and to a lesser extent, memory. In this dissertation, we study two increasingly important components: interconnects (predominantly focused on those inside a chip, but not limited to them) and graphics processing units (GPUs). Our contributions in this dissertation include a set of innovative measurement techniques to estimate the power consumed by the target components, statistical and analytical approaches to develop power models and their optimizations, and algorithms to manage power statically and at runtime. Experimental results show that it is possible to build models of sufficient accuracy and apply them for intelligently managing power on multiple levels of the system hierarchy: chip interconnect at the micro-level, heterogeneous nodes at the meso-level, and a supercomputing cluster at the macro-level.
Bass, Jeremy Hugh. "The potential of combined heat and power generation, wind power generation and load management techniques for cost reduction in small electricity supply systems". Thesis, University of Strathclyde, 1987. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21484.
Texto completoSeelhof, Michael. "Long term infrastructure investments under uncertainty in the electric power sector using approximate dynamic programming techniques". Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90724.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 179-183).
A computer model was developed to find optimal long-term investment strategies for the electric power sector under uncertainty with respect to future regulatory regimes and market conditions. The model is based on a multi-stage problem formulation and uses approximate dynamic programming techniques to find an optimal solution. The model was tested under various scenarios. The model results were analyzed with regards to the optimal first-stage investment decision, the final technology mix, total costs, the cost of ignoring uncertainty and the cost of regulatory uncertainty.
by Michael Seelhof.
S.M. in Engineering and Management
Ghosh, Mrinmoy. "Microarchitectural techniques to reduce energy consumption in the memory hierarchy". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28265.
Texto completoCommittee Chair: Lee, Hsien-Hsin S.; Committee Member: Cahtterjee,Abhijit; Committee Member: Mukhopadhyay, Saibal; Committee Member: Pande, Santosh; Committee Member: Yalamanchili, Sudhakar.
Tegen, Suzanne Isabel Helmholz. "Electricity decision-making: New techniques for calculating statewide economic impacts from new power supply and demand-side management programs". Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3239449.
Texto completoGarcía, Elvira David. "Contributions on DC microgrid supervision and control strategies for efficiency optimization through battery modeling, management, and balancing techniques". Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/672010.
Texto completoAquesta tesi presenta equips, models i estratègies de control que han estat desenvolupats amb l'objectiu final de millorar el funcionament d'una microxarxa CC. Es proposen dues estratègies de control per a millorar l'eficiència dels convertidors CC-CC que interconnecten les unitats de potència de la microxarxa amb el bus CC. La primera estratègia, Control d'Optimització de Tensió de Bus centralitzat, administra la potència del Sistema d'Emmagatzematge d'Energia en Bateries de la microxarxa per aconseguir que la tensió del bus segueixi la referència dinàmica de tensió òptima que minimitza les pèrdues dels convertidors. La segona, Optimització en Temps Real de la Freqüència de Commutació, consisteix a operar localment cada convertidor a la seva freqüència de commutació òptima, minimitzant les seves pèrdues. A més, es proposa una nova topologia d'equilibrador actiu de bateries mitjançant un únic convertidor CC-CC i s'ha dissenyat la seva estratègia de control. El convertidor CC-CC transfereix càrrega cel·la a cel·la, emprant encaminament de potència a través d'un sistema d'interruptors controlats. L'estratègia de control de l'equalitzador aconsegueix un ràpid equilibrat del SOC evitant sobrecompensar el desequilibri. Finalment, es proposa un model simple de degradació d'una cel·la NMC amb elèctrode negatiu de grafit. El model combina la simplicitat d'un model de circuit equivalent, que explica la dinàmica ràpida de la cel·la, amb un model físic del creixement de la capa Interfase Sòlid-Electròlit (SEI), que prediu la pèrdua de capacitat i l'augment de la resistència interna a llarg termini. El model proposat quantifica la incorporació de liti al rang de liti ciclable necessària per a aconseguir els límits de OCV després de la pèrdua de liti ciclable en la reacció secundària. El model de degradació SEI pot emprar-se per a realitzar un control predictiu de bateries orientat a estendre la seva vida útil.
This dissertation presents a set of equipment, models and control strategies, that have been developed with the final goal of improving the operation of a DC microgrid. Two control strategies are proposed to improve the efficiency of the DC-DC converters that interface the microgrid’s power units with the DC bus. The first strategy is centralized Bus Voltage Optimization Control, which manages the power of the microgrid’s Battery Energy Storage System to make the bus voltage follow the optimum voltage dynamic reference that minimizes the converters’ losses. The second control strategy is Online Optimization of Switching Frequency, which consists in locally operating each converter at its optimum switching frequency, again minimizing power losses. The two proposed optimization strategies have been validated in simulations. Moreover, a new converter-based active balancing topology has been proposed and its control strategy has been designed. This equalizer topology consists of a single DC-DC converter that performs cell-to-cell charge transfer employing power routing via controlled switches. The control strategy of the equalizer has been designed to achieve rapid SOC balancing while avoiding imbalance overcompensation. Its performance has been validated in simulation. Finally, a simple degradation model of an NMC battery cell with graphite negative electrode is proposed. The model combines the simplicity of an equivalent circuit model, which explains the fast dynamics of the cell, with a physical model of the Solid-Electrolyte Interphase (SEI) layer growth process, which predicts the capacity loss and the internal resistance rise in the long term. The proposed model fine-tunes the capacity loss prediction by accounting for the incorporation of unused lithium reserves of both electrodes into the cyclable lithium range to reach the OCV limits after the side reaction has consumed cyclable lithium. The SEI degradation model can be used to perform predictive control of batteries oriented toward extending their lifetime.
Brka, Adel. "Optimisation of stand-alone hydrogen-based renewable energy systems using intelligent techniques". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1756.
Texto completoKingry, Nathaniel. "Heuristic Optimization and Sensing Techniques for Mission Planning of Solar-Powered Unmanned Ground Vehicles". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523874767812408.
Texto completoEmelin, Samuel. "Analyse et intercomparaison des choix techniques majeurs en terme de structures de réseau et de règles d'exploitation parmi les grands distributeurs d'électricité". Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT042.
Texto completoFaced to a context of a global lack of growth in electricity consumption, but with many potential development of new uses, added with the appearance of more and more dispersed generation, the main French distribution grid utility needs to question and compare its choicesconcerning grid structure and exploitation practices. Grid building principles have a greatimpact over its capacity to integrate at low cost consumption and production facilities, whilemeeting society needs, mainly continuity of supply. This work allows to compare thosetechnical choices between France and other countries, to determine where French utilitystands and what are its specific features in a worldwide technical environment.After setting a perspective about uses and production development, mainly on the basis of French legislation, the overall distribution grid architecture is described. Functional differences in structure choices in the world are then analysed, their consequences in thesizing of equipments is underlined. Then the equilibrium between voltage levels is questioned,as the effect of territorial features on the grid. Finally, new technical choices are proposed after advantages and drawbacks analysis of existing world grids
Ouni, Bassem. "Caractérisation, modélisation et estimation de la consommation d'énergie à haut-niveau des OS embarqués". Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-01059814.
Texto completoChen, Jhih-jie y 陳志杰. "A Novel Power Management Technique Applied in Non- Contact Vital Sign Detection System". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/63024919434872874457.
Texto completo國立中山大學
電機工程學系研究所
100
This paper presents a novel power management analysis method to reduce the power consumption for the non-contact vital sign sensor. The sensor consisting of the class-E power amplifier (PA), low noise amplifier (LNA), single pole double through (SPDT) switch, and circularly polarized antenna (CPA) is integrated on the Flame Retardant Class 4 (FR-4) epoxy-glass laminate substrate. The appropriate pulse width and pulse period are determined to decrease the power consumption and accurately detect the human physiological signals (respiration and heartbeat). A simple direct down-conversion architecture with a tunable phase shifter is utilized to eliminate the null detection point and the direct current (DC) offset. The overall power consumption of the proposed sensor with the novel power management technique is only 40 % of the conventional system with the DC bias, which can be utilized for the green energy application.
Chen, Yu-Her y 陳禹何. "Novel Transceiver Structure with Power Management Technique by Dynamic Supply for Non-contact Vital Sign Detection". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/12994374572764499245.
Texto completo國立中山大學
通訊工程研究所
100
The power management technique is employed in the direct down-conversion non-quadrature microwave Doppler radar transceiver for the non-contact vital sign detection based on 0.18 µm CMOS technology. The overshoot and undershoot types of the transient waveform distortion and the simultaneous switching noise (SSN) caused by the high speed pulse signal will severely influence the accuracy for the vital sign detection, so that this investigation clearly analyzes the pulse period, pulse width, rise/fall times and the voltage levels of the pulse bias. In the circuit design, the low power current-reused (CRU) power amplifier (PA) can maintain enough output power by using the crucial double primary transformer (DPTF) and balun. The presented LNA with a differential inductor can provide the noise matching needed and increase the transducer gain in order to achieve the optimal power consumption and the transducer gain in the Rx mode. The excellent isolation between the Tx and Rx mode is obtained with the new parallel directed switch. The overall power consumption of the presented transceiver with the optimal pulse bias is 60% lower than the conventional transceiver with the direct current (DC) bias, and the null detection point and DC offset can be eliminated by the tunable phase shifter.
Paracha, Zahir Javed. "Design and development of intelligent computational techniques for power quality data monitoring and management". Thesis, 2011. https://vuir.vu.edu.au/19381/.
Texto completoMusti, S. S. Phaniram. "Development Of Algorithms For Bad Data Detection In Power System State Estimation". Thesis, 2007. http://hdl.handle.net/2005/496.
Texto completoLu, Zhijian. "Runtime management techniques for power-and temperature-aware computing/". 2007. http://wwwlib.umi.com/dissertations/fullcit/3248096.
Texto completoHsieh, Jing-Rong y 謝景融. "Centralized Power Management Techniques for Wireless Local Area Networks". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/47288800153547084225.
Texto completo國立交通大學
電信工程研究所
99
In the past decade, IEEE 802.11 wireless LANs has gained large popularity in broadband wireless access. Users are demanding high performances while keeping respectable operation time for the mobile devices. Power management (PM) is an essential technique for energy saving by putting de-vices into low power state during appropriate interval. For a multi-user and shared medium wireless network, in addition to managing power state according to readiness of traffic, it is important to separate the usage time of different users to prevent energy-consuming overhearing. Hence, in this dissertation, considering variable-bit-rate traffic and unpredictable error recovery, we focus on the scheduling algorithms to reduce the chance of service period overlapping. To support standardized power saving mechanism in IEEE 802.11e, we propose a feasible scheduling algorithm for the Scheduled Automatic Power Save Delivery. The goal is to maximize the minimum distance between the scheduled instants of new joining traffic stream (TS) and exist-ing scheduled events (SEs). By the proven periodicity of service schedules, the redundant check in the previous brute-force method can be avoided. Moreover, considering limited number of classes for TSs, we can pre-calculate and store necessary information to further reduce the implementation complexity. Extending the idea of finding the optimal service start time for new joining TS incre-mentally, we also study the rearrangement of existing SEs to further maximize the system minimum distance. We prove the upper bound of the system minimum distance and design efficient rearrang-ing algorithms to achieve satisfactory energy saving. In order to achieve higher system bandwidth utilization (BU), multi-polling mechanisms are often employed to reduce protocol overhead. However, they may require wireless stations (STAs) to spend much time in overhearing. We propose an energy-efficient multi-polling mechanism which combines PM strategy with a low overhead Medium Access Control protocol. Given a desirable guarantee of BU, an energy optimized wake-up time schedule (WTS) is devised. Significant saving of energy can be obtained with only small loss of BU as trade-off. It is the consequence of alleviat-ing the overhearing problem by well scheduled WTSs for STAs. In the end, we also study the ener-gy saving issue induced from error recovery. A WTS and a renewal algorithm in correspondence with the delay caused by retransmissions are proposed for the TDMA-like multi-polling mechanism. Simulation results show that, compared with the original setting, significant improvement can be obtained by the proposed algorithms.
Wu, Tung-Yeh. "Power supply noise management : techniques for estimation, detection, and reduction". Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2440.
Texto completotext
Zhong, Guo-wei y 鐘國維. "Campus Building Power Management Using Embedded System and Software Agent Techniques". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/73563155400006353582.
Texto completo逢甲大學
資訊工程所
98
In recent years, there are less and less resource available on earth. Electricity conserving has been a goal that most people would like to achieve. The electricity consumption of government units, private enterprises, hospitals, and schools are very high. And they try their best to do energy conservation. Classrooms of each building or public areas in the school has many power devices, it’s difficult to do well management. Another reasons is, Campus have many teachers and students, if some of them have bad habits of using power device or waste public power resources, it will cause management difficulties and the waste of electricity. Therefore, this research presents an power management system based on embedded system and software agent techniques. The agents can do power management for every regions by some manage policies which customized by every regions, respectively, implement the power management to every regions in campus building. The agents will also collect the information of the power device using power resources, then do some calculate and make a decision that change manage mode to reduce power consumption mode or not. In embedded systems, the various controller modules and sensor modules are distributed in the regions. By using radio control technology, there will have no trouble in wiring between modules and increasing the number of modules. Finally, for effective monitoring and measurement of large-scale power facilities, the study also included the power analyzer measurement capabilities, it can accurately understand the operation of the power status of equipment, this information will help for the agents to calculate or make a decision.
Song, Ting-Chen Tom. "QoS-based power management techniques for uplink W-CDMA cellular systems". Diss., 2003. http://hdl.handle.net/2263/28078.
Texto completoDissertation (M Eng (Electronics))--University of Pretoria, 2006.
Electrical, Electronic and Computer Engineering
Unrestricted
Hankendi, Can. "Adaptive runtime techniques for power and resource management on multi-core systems". Thesis, 2015. https://hdl.handle.net/2144/13682.
Texto completoPan, Chia-peng y 潘家鵬. "Indoor Devices Power Management by using Embedded System and Software Agent Techniques - A Case Study on the Power Management of Multimedia Classrooms". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/76632045779178169121.
Texto completo逢甲大學
資訊工程所
96
Since the petroleum will be exhausted in tens of years and the oil price will be unavoidably going up, the country does the best to push energy-saving and to reduce carbons activity. The campus is an open space to the public, for a lot of students the insufficient awareness of treasure public resources lead to much waste of the electricity power. Therefore, this research is focused on how to design an agent-based automatic power management system to achieve the goal of energy-saving in the campus. In the past, colleges often adopt the approach of central power management for each building. Users of a classroom usually waste much electricity power because they often forget to turn off power switches or improper use of some heavy power-consumption devices, like air-conditioners, etc. Considering the classroom as the level of power management, however, the college power system manager is unable to take care of each individual classroom because there are so many classrooms. This research proposes an automatic power management system combining the characteristic of conventional central management with the ability of dynamic adjustment of individual management by using embedded system and software agent technology. This thesis proposes a classroom power management system including three main parts: a Classroom Management Server (CM Server), a Power Status Management Card (PSM Card), and a Device Control Card (DC Card). CM Server and PSM Card support the execution of a power management agent system responsible for maintaining school calendar and classroom timetable. A classroom timetable is used for the classroom reservation and task of automatic power management. DC Card is constructed by a micro controller unit responsible for controlling device power switch, detecting the temperature in a classroom and monitoring the existence of human bodies. The experimental system implemented the power management for multimedia classrooms. It controls the indoor devices, which are common in classroom, like light, fan, air-conditioner and even computer. Three kinds of power switch control methods, including relay, infrared ray, and programming control, are proposed. We propose a classroom power management scenario based on Software Agent Technology. A software agent will check for school calendar, and classroom timetable, and classroom usage table to derive a suitable power management scenario. Each power management scenario will perform different management tactic involving some situations, for example if someone in a classroom or not, the environment temperature, and soon. I hope to achieve the goal of reducing school power manager’s pressure in promoting the efficiency of power saving in campus.
Zhao, April (Yang). "Efficiency Enhancement Techniques for Switched Mode Power Electronics". Thesis, 2011. http://hdl.handle.net/1807/29653.
Texto completoLatheef, Mohamed Imran. "Application of optimization techniques for reservoir management in conjunction with thermal power generation". 1991. http://hdl.handle.net/1993/9769.
Texto completoChen, Chih-liang y 陳志良. "Design and Implement a Swing-Vdd Clock-Power Management Techniques in Low-Power Video Decoder for HDTV Applications". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/93310414179258825118.
Texto completo逢甲大學
電子工程所
94
Because the point of designing circuit still mainly focuses on the consuming products, low power design has been extensively researched and been used on various kinds of circuit. Although there is a lot of research about the low power design in recent years, most of low power design technology is very complex for designer. In the thesis, we try to utilize the principle of adiabatic charging to reduce power consumption, find the new low power design structure that can be applied to various kinds of circuit. And then, we will implement and verify the circuit design. We have reached three main goals in this thesis: First of all, we have offered a simple control circuit to produce adiabatic charging signal in power supply; The second, we combine cell-base IC design flow with the swing-Vdd clock-power management circuit and let the designer easy to produce this swing-Vdd clock-power management circuit; Finally, the simulation result of various kinds of circuit prove that the swing-Vdd clock-power management circuit can reduce a lot of power consumption.
Ting, Chung-Yi y 丁中一. "Power Management Techniques in DC-DC Converters for Low-voltage and High-current Loads". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/k339fp.
Texto completo國立臺灣大學
電子工程學研究所
107
Science and technology rapidly progress day by day, such as 5G communication, big data, internet-of-things (IoT), artificial intelligence (AI). In the future, these computers with high-speed computing ability and high-speed data transmission are needed in various applications. Therefore, high-speed integrated circuits are very important in high-speed computing and data transmission interface. In addition, the supply voltage becomes lower and lower because the technology process is rapidly advancement based on Moore’s law. However, power consumption of electronic devices constantly increase for higher performance. Thus, these DC-DC converters in low-voltage and high-current applications are essential research topic in recent years. In low-voltage and high-current applications, these loads have two categories about high-speed digital circuits such as CPUs, GPUs, and AI chips and high-speed analog circuits such as high-speed RF transmitters, high-speed RF receivers, high-speed DACs, high-speed ADCs, and optical communication circuits. In general, these high-speed circuits need to the DC-DC converter with fast load-transient response, low EMI, high-current capability, and high-efficiency. Traditionally, low-dropout regulators (LDOs) have been used in on-chip voltage source because of load-transient response and low-ripple output voltage. However, LDOs are not suitable for high power applications because the dropout voltage leads to low efficiency in low-voltage and high-current applications. To achieve fast load-transient response, fast DVS tracking response, high-current capability, high power efficiency, and low EMI in high power application, the dissertation focuses on studying power management techniques of these DC-DC converters in low-voltage and high-current applications. The dissertation has three works: In the first work, we propose a quasi-V2 hysteretic buck converter with adaptive constant on-time (ACOT) control for fast DVS and load-transient response in RF applications. For implement adaptive constant on-time control, the work proposes adaptive constant on-time circuit with transient-enhanced technique and optimization of system compensation for fast load-transient response and fast DVS. The work uses TSMC T18 1P6M process and chip area is 1.81mm2. The measured peak efficiency is 90.1%. In 600mA step-up/down load current, the light-to-heavy/heavy-to-light recovery time is 0.6μs. In 0.6V voltage step-up/down, the up-tracking/down-tracking time of DVS is 2μs. In the second work, we propose an inductor current-balancing technique (ICBT) for fast-locking delay-locked loop (FL-DLL) based four-phase buck converter with constant on-time control to achieve high-current capability and power efficiency in low-voltage and high-current applications. The work uses quasi-V2 control and constant on-time modulator for transient response and light-load efficiency. Moreover, the work proposes a fast-locking delay-locked loop (FL-DLL) for generating four-phase control signals with phase difference 90 degree and achieving low-ripple output voltage. In FL-DLL, we proposes automatic switching single/dual triggered phase detector (ASS/DT-PD) for achieving fast load-transient response. Furthermore, non-ideal effects of active and passive components causes inductor current in-balance issue. Therefore, the work proposes pulse-width-shrunk technique (PWST) automatically calibrate four-phase control signals to achieve current balance in every phase. The work uses TSMC T18 1P6M process and chip area is 6.17mm2. Finally, these proposed techniques can be verified by post-layout simulation. In 1.4A step-up/down load current, the light-to-heavy/heavy-to-light recovery time is 2.5μs/2.5μs and undershoot/overshoot voltage is below 10mV. Because of achieving current balance and phase alignment, the proposed FL-DLL based four-phase buck converter has 85% efficiency and 4mV voltage ripple. In the third work, we propose a quasi-V2 hysteretic buck converter with EMI reducing technique using phased-locked loop with MASH 1-1 all-digital Δ-Σ modulator. The hysteretic DC-DC buck converter is viewed as voltage control oscillator (VCO). For keeping fixed-frequency, the work uses phase-locked loop to lock PWM frequency. In the EMI reducing technique, phase-locked loop with MASH 1-1 all-digital Δ-Σ modulator randomly modulates PWM control signal for spreading spectrum of output voltage. The chip uses TSMC T18 1P6M process and chip area is 1.81mm2. Moreover, the measured peak efficiency is 90%. By post-layout simulation, the low EMI reducing technique improves 20dB compared with without EMI technique. In load-transient response performance, the light-to-heavy recovery time is 4.47μs and undershoot voltage is 34.3mV and the heavy-to-light recovery time is 5.12μs and overshoot voltage is 32.3mV.
Hsu, Pi-Lin y 徐碧璘. "The Study of Applying Decision Support System Techniques in Risk Integrated Management for Nuclear Power Plants". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/98260377392435274187.
Texto completo國立中央大學
資訊管理學系
85
This study aims in the application of decision support system technique in risk integrated management for nuclear power plants. Both the Chinese graphic man-machine interface and the fast risk assessment model were developed and integrated. It can help plant personnel get the Probabilistic Risk Assessment (PRA) information more quickly via colorful screen display, and further be applied in monitoring the system operation and maintenance activities. The prototype demonstration system, including one of the plant system implementation, was verified by plant personnel and recommended as an efficient and useful tool in plant safety and performance improvement.
Wu, Kuan-I. y 吳冠儀. "Design and Implementation of the Current-Mode Power Management Integrated Circuits with High Speed Adaptive Controlling Techniques". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/82655247546367713214.
Texto completo國立臺灣大學
電子工程學研究所
105
As a result of the continuing growth of miniaturization and integration technologies in the semiconductor industry and the emergence of the internet of things (IoT), the continuing trend is to reduce the power supply voltage to below 1 V and increase the power supply current greatly exceed the 1000 mA per chip. Therefore, the next-generation power management integrated circuits must be able to deal with the challenge of the ultra-low voltage and fast changing load profiles. Since the traditional topology of the current-mode pulse width modulation (PWM) has its bandwidth and stability limitation, the transient response and the power quality cannot be further improved. Therefore, this dissertation is aiming at the high speed adaptive controlling techniques for current-mode PWM converters. In this dissertation, two novel high speed adaptive controlling techniques are proposed. The “synchronous double-pumping (SDP) technique” can dramatically improve the transient response of the conventional current-mode PWM converters. The prototype chip was fabricated using TSMC 0.35 μm CMOS process. The experimental measured recovery time is 2.4 μs and 2.6 μs, respectively, in response to the 400mA step-up and step-down load changes. Those are improved by a factor of 8.33 and 8.23, respectively. The “dynamically adjusted triple-feedback-loop controlling (DATFLC)” technique used an extra dynamic voltage adjusting feedback loop, which is comprising of a variable gain peak current sampler (VGPCS), adaptive load transient accelerator (ALTA) and a dynamic analog voltage elevator (DAVE), to accelerate the transient response of the conventional current-mode PWM converters. Besides, this technique used a transient accelerated zero-current detector (TAZCD) to further accelerate the load step-down response by means of allowing the reversed inductor current to discharge the converter output through the lower gate of the power stage at the beginning periods of the load step-down response. Moreover, the physical implementation of the proposed DATFLC technique is really compact, and the chip area overhead is only 7.41% to the core area. The prototype chip was fabricated using TSMC 0.25 μm HV CMOS process. The experimental measured recovery time is 3.2 μs and 3.0 μs, respectively, in response to the 400mA step-up and step-down load changes. Those are improved by a factor of 7.38 and 8.20, respectively.