2 research outputs found

    Adaptive and identification two tanks system in control

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    The classical approach to system identification is to identify the transfer function on the basis of measured data. The goal of this research, with the aid of Matlab package, is to both identify and adaptively control a laboratory non-linear two tanks system which is simulated in a Simulink model block. Sampling time and model structure selection will be introduced first. Then, concentration will be on the OLS and IV methods of estimating parameters as they will be used in the Matlab identification toolbox. The system accordingly will be identified to obtain both discrete and continuous linear function models at operating points of 3 and 6. Adaptive and self-tuning control is the second part of this report where self-tuning PI control will be implemented based on RLS and phase margin design algorithms. Relay-based auto-tuning PI control is the second part control method, and practical comparison between them is provided at the end of this repor

    Biodegradation of Polymeric Insulators Used in Electrical power

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    المواد البوليميرية لها مجموعة متنوعة من الاستخدامات بسبب التنوع الهيكلي. يعد تحللها البيولوجي مصدر قلق شائع لأنه عند استخدامها كعوازل كهربائية  فإن انهيار سلامتها الهيكلية يعرض الناس لمخاطر كهربائية. تبدأ عملية تحلل العوازل بواسطة الأغشية الحيوية بتكوين غشاء حيوي على سطحه. يجب أن يكون تكوين الأغشية الحيوية في ظل ظروف بيئية مناسبة مثل الرطوبة أو البيئة الرطبة. تعرض هذه الورقة عملية التحلل البيولوجي للعوازل البوليميرية. يتناول العمل إلى العمليات التي تشارك في نفس العوامل ، والعوامل التي تزيد من عملية التحلل البيولوجي. بمجرد تكوين الأغشية الحيوية على سطحها ، ستفرز الكائنات الحية الدقيقة إنزيمات تستطيع مهاجمة وتحلل سطح البوليمر. يخلص البحث إلى أن العوامل الأكثر شيوعًا التي تساعد في التحلل الحيوي هي تركيب البوليمرات، وطبيعتها البلورية، والعوامل البيئية.Polymeric materials have a variety of uses due to structural versatility. Their biodegradation is a common concern since when used as electrical insulators the breach of their structural integrity exposes people to electrical dangers. The process of degradation of the insulators by biofilms begins by the formation of a biofilm on its surface. Formation of the biofilm has to be under appropriate environmental conditions like in a damp or moist environment. This paper presents the process of biodegradation of polymeric insulators. It looks at the processes that are involved in the same and the factors that amplify the biodegradation process.  Once the biofilms have been formed on their surface, the microbes will secrete enzymes that can attack and hydrolyze the surface of the polymer. The paper concludes that the most common factors that aid the biodegradation are the composition of the polymers, the crystalline nature, and the environmental factors
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