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Article
DESIGN OF INTELLIGENT PID CONTROLLER BASED ON MODIFIED SWARM TECHNIQUES

Author: Ahmed Kareem Abdullah
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2017 Volume: 10 Issue: 2 Pages: 147-157
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

The swarm techniques are used widly to enhance the response of the control system, but there are many drawbacks appear when these techniques are used to select the initial solution for the problem and then will referect on the overall convergence. This paper try to solve this problem by modify the initial solution of particale swarm techniques based on fast genetic algorithm, the modified PSO make good free searching in candidate solutions to get optimum suggesions, which leads the algorithm towards the global optimum searching over wid range. The proposed controller named PSO-FGA-PID controller and two experiments are tested by this controller to check the proposed work, first one the linear time invariant system is taken and the second one is to control on the speed of the DC motor.


Article
Enhancement of Twins Fetal ECG Signal Extraction Based on Hybrid Blind Extraction Techniques

Authors: Ahmed Kareem Abdullah --- Hadi Adab Hamad --- Nasser Ali Hasson AL-Zubaydi
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2017 Volume: 25 Issue: 4 Pages: 1127-113
Publisher: Babylon University جامعة بابل

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Abstract

ECG machines are noninvasive system used to measure the heartbeat signal. It’s very important to monitor the fetus ECG signals during pregnancy to check the heat activity and to detect any problem early before born, therefore the monitoring of ECG signals have clinical significance and importance. For multi-fetal pregnancy case the classical filtering algorithms are not sufficient to separate the ECG signals between mother and fetal. In this paper the mixture consists of mixing from three ECG signals, the first signal is the mother ECG (M-ECG) signal, second signal the Fetal-1 ECG (F1-ECG), and third signal is the Fetal-2 ECG (F2-ECG), these signals are extracted based on modified blind source extraction (BSE) techniques. The proposed work based on hybridization between two BSE techniques to ensure that the extracted signals separated well. The results demonstrate that the proposed work very efficiently to extract the useful ECG signals.

جهاز تخطيط القلب هو جهاز غير جراحي يستخدم لقياس الاشارات الناتجه من القلب من الضروري مراقبة قلب الاجنه التوائم خلال عملية الحمل لتشخيص كفائة القلب والكشف المبكر عن اي مشكله قبل الولاده, في حالات الحمل المتعدد تقنيه استخدام الفلاتر غير كافيه في فصل اشارات قلب الاجنه عن اشرات قلب الام , في هذا البحث مزيج اشاره القلب المتكون من ثلاث اشارات ناتجه من الجنين الاول والجنين الثاني وقلب الام استخلصت عن طريق تقنيه الفصل العمياء المعدله. حيث ان هذه التقنية تعتمد على خوارزميتن دمجت سويه للحصول على افصل عمليه فصل بين الاشارات . بينت النتائج ان العمل المقترح هو جيد وكفؤء في استخلاص اشارات القلب .

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