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Article
CONTROLLR MODELLING AND DESIGN OF ROTATIONAL SPEED FOR INTERNAL COMBUSION ENGINE

Authors: Raoof M. Radhi --- Emad Q. Hussien
Journal: University of Thi-Qar Journal for Engineering Sciences مجلة جامعة ذي قار للعلوم الهندسية ISSN: 26645564/26645572 Year: 2013 Volume: 4 Issue: 2 Pages: 1-13
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

This paper proposes a controller design of a nonlinear model of an internal combustion engine based on linear quadratic regulator (LQR) technique. The design takes into consideration the effect of external disturbances that occurs during the operation of system. The equations of motion are linearized according to the perturbation theory in order to inspect the dynamic stability of the engine motion, and the subsequent design of appropriate feedback controllers for the system, which can be obtained by solving the LQR problem. The results show that the proposed controller has good performance and stability than PID controller. The simulations have been carried out in Matlab/Simulink environment.

يهدف البحث الى تصميم سيطرة على النموذج اللا خطي لمنظومة محرك الاحتراق الداخلي على أساس تقنية LQR. يأخذ التصميم بنظر الاعتبار الاضطرابات الخارجية المؤثرة على عمل المحرك , ويمر على تحول المعادلات الحركة الى النموذج الخطي حسب نظرية الاضطراب ومن ثم دراسة الاستقرار الديناميكي لاداء المحرك وبالتالي تصميم منظومة مناسبة لوحدة تحكم ردود الفعل من خلال معالجة معوقات تطبيقLQR. أظهرت النتائج البحث ان وحدة التحكم المقترحة قد ادت الى تحسن واضح في اداء والاستقرارية المنظومة بالمقارنة مع المسيطر PID , علما ان عملية المحاكاة قد تمت في اطار MATLAB / SIMULINK.


Article
Electronic Throttle Valve Control Design Based on Sliding Mode Perturbation Estimator †

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Abstract

Abstract – The electronic throttling angle control system is the newly commonrequirement trend in automotive technology. It is used to regulate the amount of air flowinto the engine. Due to the existence of multiple non-smooth nonlinearities, thecontroller design to the electronic throttle valve becomes a difficult task. Thesenonlinearities including stick–slip friction, backlash, and a discontinuous nonlinearspring involved in the system. The designed controller in the present work consists ofthe estimated perturbation term with a negative sign (used to cancel the perturbationterm) and a stabilizing term used to stabilize the nominal system model. Theperturbation term consists of the external unknown input and the uncertainty in throttlevalve model including the nonlinear terms. The utilized estimator uses the sliding modecontrol theory and based on the equivalent control methodology. The simulation resultsshow the effectiveness of the proposed controller in estimating the perturbation term.And then in forcing the angle of the throttle valve to follow the desired opening angle inpresence of nonlinearities and disturbances in throttle system model and the variation inits parameters.


Article
Modeling and Simulation of Linear and Nonlinear Dynamic Model for Double Inverted Pendulum on Cart System

Author: Shuruq Abd Al-meer
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2018 Volume: 26 Issue: 1 Pages: 94-101
Publisher: Babylon University جامعة بابل

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Abstract

This paper displays linear and nonlinear model for double inverted pendulum system depended on Lagrange equation and the system response for linear and nonlinear of DIPS are noted and analyzed. The inverted pendulum has been advanced for a laboratory experiments. The essential variance between the linear and nonlinear equation is present. This analysis is useful for progress of effective controller for a DIPS.

يعرض هذا البحث النموذج الخطي والغير خطي لنظام مزدوج البندول المقلوب اعتمادا على معادلة لاكرنج واستجابة النظام الخطي والغير خطي قد تم ملاحظتها وتحليلها . وان البندول المقلوب طور لإجراء التجارب المختبرية. التباين الجوهري بين المعادلة الخطية وغير الخطية تمت ملاحظتها خلال الاشتقاق . هذا التحليل مهم في تطوير المسيطر الفعال لنظام مزودج البندول المقلوب.

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