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Article
Energy Saving Using Intelligent Controller Based on Fuzzy Logic Control
حفظ الطاقة باستخدام مسيطر ذكي اعتمادا على السيطرة بالمنطق المضبب

Authors: Krikor S.Krikor --- Abduljabbar O.H Alshammery
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2012 Volume: 30 Issue: 6 Pages: 920-938
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

To reduce the impact of the high current on the power grid from the start process of the large induction motor and eliminate the negative influences of traditional reduced voltage start on the electronic and mechanical equipments and enhance the ability of the energy saving of the system. We studied and improved the intelligent soft start of such motors, this paper presents the design of intelligent soft starting controller in viewpoint of energy saving for power electronic systems. The proposed controller was compared through experimental studies under identical conditions with the thyristor soft starting controller (conventional controller). The performance comparison is made on the aspects of power quality and energy saving advantages. It is found thatthe proposed controller has superior operating and performance characteristics as compared to the conventional one.

من أجل تقليل تأثير التيار العالي في شبكة القدرة من جراء عمليات التشغيل الابتدائي للمحرك الحثي ذو القدرة العالية وحذف التأثيرات السلبية للطرق التقليدية لتقليل فولتية البدء في الاجهزة الميكانيكية والالكترونية وأمكانية تحسين حفظ الطاقة للنظام، نقدم دراسة وتحسين بدء تشغيل سلسوذكي لهذه المحركات، هذا البحث يقدم تصميم مسيطر ذكي لبدء التشغيل من وجهة نظرحفظ الطاقة لانظمة القدرة الالكترونية. المسيطر المقترح قورن من خلال الدراسات المختبرية تحت ظروف متطابقة مع مسيطر بدء تشغيل سلس تقليدي يعمل بالثايروستور، قورن الاداء من جوانب مميزاتكمية القدرة وحفظ الطاقة ووجد ان عمل وخواص الاداء للمسيطر المقترح يعمل بشكل ممتاز مقارنةمع المسيطر التقليدي.


Article
Sound Signal Analysis Using FIR Filters for Musical Fountain Operation

Authors: Ali M. Jasim علي محمد جاسم --- Jawad R. Mahmood جواد راضي محمود --- Ramzy S. Ali رمزي سالم علي
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2016 Volume: 16 Issue: 2 Pages: 21-28
Publisher: Basrah University جامعة البصرة

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Abstract

In digital signal processing (DSP), FIR digital filter isvery important device to deal with particular frequencies of acertain signal to be appropriate for some applications such ascommunications, sound equalizers, etc. In this paper, FIRfilters are adapted to decompose the original sound signal intofour signals. Each one is created by one FIR filter and eachfilter represents a narrow band of frequencies. The filteroutput is used to drive a certain variable speed drive (VSD) tocontrol the speed of a water pump and light intensity of acolored lamp. This filter output signal is applied to the analogcontrol voltage terminals of the VSD unit to control thefrequency and magnitude of the voltage supplied to the lampand pump. Thus, the heads of the water jets and the lightintensity is controlled according to the analog control signalswhich are created by the FIR filters (The VSD is used to mapthe filter output into light intensity and water head bycontrolling the supplied voltage of them). The goal of this studyis to design and simulate four sound harmonics bandsproduced by FIR filters to drive four VSDs which aresimulated using V/F ratio constant method for musicalfountain operation.

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