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321 articles for “Control Systems”
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Research ArticleOpen accessAll words, across the recordField Programmable Gate Array Based RF-THI Pulse Width Modulation Control for Three Phase Nverter Using Matlab Modelsim CosimulationValantina Stephen, L. Padma Suresh, P. MuthukumarThis study proposes different configurations of PWM techniques for harmonic reduction and improvement of fundamental peak voltage. For providing adjustable frequency power to industrial applications, three-phase inverter is preferred. The general aim of this study is to reduce the third order harmonics and improve the Harmonic Spread Factor by different PWM techniques using matlab modelsim cosimulation. The gating signals to … …American Journal of Applied Sciences, Vol. 9, Issue 11 · 1 Sep 2012 · 7,443 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA Survey of Intrusion Detection Schemes in Wireless Sensor NetworksMurad A. Rassam, M. A. Maarof, Anazida ZainalWireless Sensor Networks (WSNs) are currently used in many application areas including military applications, health related applications, control and tracking applications and environment and habitat monitoring applications. The harsh and unattended deployment of these networks along with their resource restrictions makes their security issue very important. Prevention-based security approaches like cryptography, authentication and key management have been used to protect … …American Journal of Applied Sciences, Vol. 9, Issue 10 · 17 Aug 2012 · 8,733 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA Wireless Sensor Node Supporting Various Powers Supply and Communication MethodsStefan Gruber, Hannes Reinisch, Hartwig Unterassinger et al.Problem statement: This study presents a wireless sensor node dedicated for in-tire pressure and temperature monitoring. Additional features set it apart from the many different systems available on the highly competitive market. State-of-the-art implementations are mounted on the rim of a tire. Here the sensor node will be mounted on the inner liner of the tire. By moving the sensor … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 4 · 12 Jan 2012 · 8,032 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordDigital Simulation, Design, Comparitive Analysis of Intelligent Controllers in Adjustable Speed Drives for PQ EnhancementA. Srikrishnan, B. Justus RabiProblem statement: This study deals with the analysis, design and comparison between fuzzy and genetic based adjustable speed drives with respect to the parameters which determines the quality of power. Approach: ASD system using fuzzy controllers provide ride-through capability during voltage sags, reduces harmonics, improves power factor and is highly reliable, whereas by using genetic algorithm optimized ASD systems, the … …American Journal of Applied Sciences, Vol. 9, Issue 1 · 21 Nov 2011 · 7,012 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordLow Cost Interactive Electronic Whiteboard Using Nintendo Wii RemoteDalbir Singh, Ridha Omar, Azfar AnuarProblem statement: The application of interactive whiteboard offers extensive benefits in the learning and teaching process for classroom environment. The high cost associated with commercial interactive whiteboard may hinder its application in primary or secondary school, especially in developing countries. Thus, this study describes the methods used to create a low cost interactive and viable electronic whiteboard by using the … …American Journal of Applied Sciences, Vol. 7, Issue 11 · 8 Nov 2010 · 7,793 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA System for E-Learning Processes ManagementHassan Mohammed M. ElmetwalyProblem statement: This research deled with difficulties and challenges facing students in their seek to reach specialized courses and curriculums. Approach: It also deled with methodology of facing such challenges and difficulties and hence facilitating process of allowing such data and information to all beneficiaries, either they are student, trainees or educational organization all over the world. Results: E-learning system … …Journal of Computer Science, Vol. 6, Issue 7 · 31 Jul 2010 · 6,920 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordImproved Coupled Tank Liquid Levels System Based on Swarm Adaptive Tuning of Hybrid Proportional-Integral Neural Network ControllerM.S. Ramli, RM.T. Raja Ismail, M.A. Ahmad et al.Problem statement: Accuracy and stability of many systems in chemical and process industries which has Two-Input Two-Output (TITO) is one of the key factors of process which have cross coupling between process input and output. Approach: Unlike traditional neural network weight adaptation using gradient descent method, Particles Swarm Optimization (PSO) technique was utilized for adaptive tuning of neural network weights … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 4 · 31 Dec 2009 · 7,822 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordBoarding School Students Monitoring Systems (E-ID) Using Radio Frequency IdentificationHerdawatie Bt Abdul Kadir, Mohd Helmy Abd. Wahab, Siti Nurul Aqmariah Bt Mohd KanafiahProblem statement: Monitoring Boarding school student movement using the old-fashioned study system is inefficient and brings difficulty to the hostel management to check attendance manually. By using RFID technology, student movement is quick and easy. Approach: The application of RFID Matrix Card system as a boarding school students monitoring system (E-ID) were purposed to improve school management system and to … …Journal of Social Sciences, Vol. 5, Issue 3 · 30 Sep 2009 · 9,118 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordInfluence of Heat Treatment in Sintering Process on Characteristics of Al2o3-Zro2 Ceramics SystemsA. Rittidech, T. TunkasiriAl2O3-ZrO2 ceramics containing 5-50 mol% ZrO2 were prepared by solid state reaction method. The bulk density, average grain size and microhardness of Al2O3-ZrO2 ceramics system as function of ZrO2 content were investigated. The dense Al2O3-ZrO2 ceramics were successfully by means of carefully control processing parameters that include sintering temperature and heating/cooling rates. These ceramics with higher ZrO2 content was obtained … …American Journal of Applied Sciences, Vol. 6, Issue 2 · 28 Feb 2009 · 7,008 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordUltra Wide Band (UWB) Ad-hoc Networks: Review and TrendsRashid Saeed, Sabira Khatun, Borhanuddin M. Ali, Mohd K. AbduallahShort-range wireless systems have recently gained a lot of attention to provide seamless, multimedia communications around a user-centric concept in so called Wireless Personal Area Networks (WPAN). Ultra-Wide Band (UWB) technology presents itself as a good candidate for the Physical Layer (PHY) of WPAN, both for high and low data rate applications. Many ongoing developments of Ultra-Wide Band (UWB) system … …Journal of Computer Science, Vol. 1, Issue 1 · 31 Mar 2005 · 7,060 accessesView PDFCite