Volume 4, Issue 11, December 2013
Control of a Two layered Coupled Tank: Application of IMC, IMC-PI and Pole-Placement PI Controllers
Folorunso Taliha Abiodun, Bello Salau Habeeb, Olaniyi Olayemi Mikail and Norhaliza AbdulWahab
Department of Computer Engineering, Federal University of Technology Minna, Nigeria
Department of Telecommunication Engineering, Federal university of Technology Minna, Nigeria
Department of Control and Mechatronics Engineering, Universiti Teknologi Malaysia
Proportional Integral Derivative (PID) controller remains the most widely and applicable type of controller used for process control applications in industries till date. However the efficacy of this controller lies in the tuning technique used in the determining its parameters. In this paper, we adopt a two layer coupled tank system whose transfer function was obtained via mathematical modeling. Thereafter the comparison of the performance of the PID controller based on two different tuning techniques – pole placement and internal model control (IMC) technique and that of another controller – the IMC controller was made. This is aimed at determining which tuning technique and control strategy produces a better performance on the basis of the transient response and Integral Absolute Error (IAE) for the system. The design and simulation is being carried out using the MatLab/ Simulink Toolbox and the simulation results shows that the IMC and IMC-tuned PI controller has an improved performance over the Pole-Placement-PI controller.
— PID/PI controller, Internal Model Control (IMC), Coupled-Tank System and Integral Absolute Error (IAE)
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Microscopic and Macroscopic Voltage Quality Management
E. Jalalabadi and A. Rahimi Kian
MA of Control Engineering, ECE Department, University of Tehran, Tehran, Iran
The voltage quality issues and their proper control, in modern power systems including renewable distributed power sources and FACTS devices such as harmonics, frequency flickering and voltage fluctuations, are very important. In this paper, the power and voltage are divided into microscopic and macroscopic levels to improve the consumers’ microscopic and macroscopic voltage qualities, respectively. Based on this division, a new concept of voltage control in smart energy networks is presented as microscopic voltage management. Moreover, a new formulation with appropriate objective function to improve the microscopic and macroscopic voltage qualities is developed. The simulation results of the 15-bus distribution test system show considerable improvements on the voltage quality and voltage oscillation in distribution buses.
— Voltage Quality, Microscopic Power Consumption, Smart Energy Network and Power Management
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Investment Opportunities and Dividend Yield- (Evidence from KSE)
Muzzammil Hussain and Muhammad Usman
University of Gujrat, Pakistan
The purpose of this paper is to investigate the role of firm’s financial leverage, market to book value and firm size on dividend payout policy. OLS Regression analysis is used to find the relations between the financial leverage, market to book value, firm size and the dividend payout policy.KSE-100 index companies are selected from the Karachi stock exchange as the representative sample from the total listed companies at Karachi stock exchange for the period of four years from 2008 to 2011. The relationship between the investment opportunity and dividend policy is found negative and significant, but the financial leverage is not significantly affecting the dividend policy although it is negatively related to dividend. Firm size is positively significant towards the dividend policy.
— Stock Exchange, Companies, KSE and Opportunity
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A Comparative Study on Implementation of Aesthetics Education in Selected Government and Private School in Debremarkos Town
Atalay Mesfin Anteneh
Debremarkos College of Teachers’ Education, Aesthetics and Physical Education Department,
Pobox-428 Debremarkos, Ethiopia
The purpose of this study was to investigate the possible factors affecting implementation of aesthetics education in government and private school in Debremarkos town. Facility conditions and school outcomes such as student academic achievement, attendance, interest, completion of given period and teacher information about aesthetics. School facility condition for the implementation of aesthetics in the schools was determined by the interest of students, lack of materials and information gap. Through the use of four different research instruments, the ultimate goal of this study was to ensure the factors affecting implementation of aesthetics education in selected school. Through the use of students’ questionnaire, are provided some insights into the teachers’ real practices and their preferences of teaching aesthetics education in the school. It is also clear that most of problem is shared in teachers, students and administrative bodies. Regarding when should teachers teach aesthetics education they want to let students to play in the field? The marking strategy teachers’ use was also in problem of recording in their school because of sometimes they divided aesthetics marks for other subjects.....
— Music Education, Aesthetics and Art Education
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Optimization of Processing Data Time for Stephens Bread Industries Owerri, Imo State, Nigeria
Okolie Paul Chukwulozie, Dara Jude Ezechi, Sinebe Jude Ebieladoh and Iwenofu Chinwe Onyedika
Mechanical Engineering Department, Nnamdi Azikiwe University, P.M.B 5025 Awka, Nigeria
Special Adviser to the Governor on Local Government Projects Monitoring, Delta State, Nigeria
Mechanical Engineering Department, Federal Polytechnic Oko, Anambra State, Nigeria
This research work is aimed at modeling production processes in bread industries using linear programming model as optimization model in a given bread industry (Stephens Bread) for effective and efficient production. The L.P model was deduced to be the best optimization model to be used in any bread industry since the model analytically gives a simultaneous result of profit maximization and cost minimization. Specifically, a designed simulator in a MATLAB and Graphical Users Integrated Development Environment (GUIDE) windows (BREADPROD) that are capable of detecting the exact quantity of bread to be produced and the optimization level to maintain in any bread industry was developed. The simulator was subjected to various initial input conditions in bread production processes which include mixing, matching, moulding and baking processes with three (3) different sizes of bread loaves: the giant, the long and small loaves with reference to non-basic variables – x1, x2, x3 respectively. BREADPROD, the designed simulator, equally shows how realistic or unrealistic bread production could be. The application of L.P model which agreed with the designed BREADPROD simulator gave different profits for the two bread industries in this study while the optimum recommended production gave a higher profit of over one hundred percent when compared with that of Stephens Bread industries. The result of the proposed production mix used gave a production mix of 202 giant loaves, 102 long loaves and 92 small loaves representing 51%, 26% and 23% of the total production respectively as against the production mix for Stephens Bread, which gave 115 giant loaves, 40 long loaves and 110 small loaves. The giant loaf, long loaf and small loaf are 43%, 42% and 15% of the total production respectively.
— Modeling Production Processe, Industries and Graphical Users Integrated Development Environment
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