Journal of
Control & Instrumentation Jan - April 2014
(JoCI)
ISSN : 2347 - 7237
(JoADMS)
Jan - April 2014
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Dr. M V. Vaidyan Professor, Department of Electrical Engineering, National Institute of Technology Calicut, Kerala , India.
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STM JOURNALS
I take the privilege to present the hard copy compilation for the [Volume 5 Issue (1)] of Journal of Control & Instrumentation. The intension of JoCI is to create an atmosphere that stimulates creativeness, research and growth in the area of Control & Instrumentation. The development and growth of the mankind is the consequence of brilliant Research done by eminent Scientists and Engineers in every field. JoCI provides an outlet for Research findings and reviews in areas of Control & Instrumentation found to be relevant for National and International recent developments & research initiative. The aim and scope of the Journal is to provide an academic medium and an important reference for the advancement and dissemination of Research results that support high level learning, teaching and research in the domain of Control & Instrumentation. Finally, I express my sincere gratitude and thanks to our Editorial/ Reviewer board and Authors for their continued support and invaluable contributions and suggestions in the form of authoring writeups/ reviewing and providing constructive comments for the advancement of the journals. With regards to their due continuous support and co-operation, we have been able to publish quality Research/Reviews findings for our customers base. I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.
Dr. Archana Mehrotra Director STM Journals
Journal of Control & Instrumentation
Contents
1. Application of Virtual Instruments in Data Monitoring & Logging Hardik R. Patel
1
2. Cold Light Source for Endoscopy using AVR Microcontroller Dipesh Shah, Mayur B. Mangaroliya, Ankit M. Patel
5
3. Fuzzy Logic and Energy Model based Speed and Direct Torque Control of SVPWM Inverter Fed Induction Motor Mohammad Abdul Mannan, Toshiaki Murata, Junji Tamura
11
4. Automation of Heat Exchanger System using DCS Archana B. Yadav, Dhruv M. Patel
22
Journal of Control & Instrumentation ISSN: 2347-7237 Volume 5, Issue 1 www.stmjournals.com
Application of Virtual Instruments in Data Monitoring & Logging Hardik R. Patel* Instrumentation & Control Engineering Department, SVIT, Vasad, Gujarat, India
Abstract Data Acquisition is the process of real world physical conditions and conversion of the resulting samples into digital numeric values that can be manipulated by a computer. This system is used to measure various parameters in the industry such as pressure, temperature of plant, control room temperature, combustible gas level, humidity, weight of the product, etc. This paper shows a cost effective way to design and develop LabView based Data Acquisition System. Here, 8051 microcontroller is used as an intermediate controller to scan each channel & send data to LabView via RS-232. The parameter readings are also stored in Excel file as well as EEPROM for further analysis. Virtual Instruments like LabView, can decrease development time to a great extent, can be integrated to physical world very easily and is very user friendly.
Keywords: Data Acquisition System (DAS), virtual instruments, labview, EEPROM
JoCI (2014)Š STM Journals 2014. All Rights Reserved
Journal of Control & Instrumentation ISSN: 2347-7237 Volume 5, Issue 1 www.stmjournals.com
Cold Light Source for Endoscopy using AVR Microcontroller Dipesh Shah*, Mayur B. Mangaroliya, Ankit M. Patel Instrumentation and Control Department SVIT, Vasad, Gujarat, India
Abstract An endoscopy involves the procedure of examining internal organs of the human body using endoscope. Presently, during endoscopy halogentype or xenon type light sources are used. The main drawback of these sources is the heat dissipated by them effects the sensor data. Due to high temperature in the surrounding environment, the video tube or optical fiber used to transfer data may be damaged. Moreover if the lamp turns off during operation, one cannot change it immediately because of its high temperature. Thus the redundancy of the system is less. In order to overcome these limitations the halogen and the xenon light are replace by LED which is a cold light source. Since the LED is operated on DC source, the driver circuit would replace the bulky transformers used to operate halogen/xenon lamps. This reduces the weightand cost of the equipment. LED has longer life and it provides the better efficiency compared to the former devices. It also eliminates the use of cooling fan which is used for heat sinking purpose. In the proposed instrument, intensity of LED light and its life will be displayed with the use of micro controller. Keywords: Drive circuit, LED light, light focusing, optical principle, temperature control and light control using AVR micro controller, data logger
JoCI (2014) 5-10 Š STM Journals 2014. All Rights Reserved
Page 5
Journal of Control & Instrumentation ISSN: 2347-7237 Volume 5, Issue 1 www.stmjournals.com
Fuzzy Logic and Energy Model based Speed and Direct Torque Control of SVPWM Inverter Fed Induction Motor Mohammad Abdul Mannan1*, Toshiaki Murata2, Junji Tamura2 1
Department of EEE, American International University, Dhaka, Bangladesh Department of EEE, Kitami Institute of Technology, Kitami, Hokkaido, Japan
2
Abstract This paper presents speed and direct torque controllers based on fuzzy logic for a spacevector modulated pulse width modulated inverter fed induction motor. The direct torque control has been designed by decoupling the torque and flux based on the energy model of induction motor. The designed direct torque control system can be accomplished by using constant switching frequency with space vector modulated pulse-width modulated inverter. In order to control the speed of induction motor conventional PI controller has been used in industrial applications due to its simplicity. Traditional PI controller does not meet the requirement (such as minimize the overshoot, steady-state error, robustness under the variation of load disturbance and parameters) for high performance induction motor. In this paper two fuzzy logic controllers are developed to control the torque and speed of an induction motor. The fuzzy logic controllers are designed using the energy model of induction motor. The drive is simulated successfully using Matlab/Simulink to verify the performance of designed fuzzy-logic controllers. The performance of the drive has been examined under various working conditions. The simulation results show that the proposed fuzzy logic controllers work satisfactorily making the drive more suitable for high performance applications.
Keywords: Direct-torque control, fuzzy logic control, speed control, energy model, induction motor, space-vector pulse-width modulation
JoCI (2014) 11-21 Š STM Journals 2014. All Rights Reserved
Page 1
Journal of Control & Instrumentation ISSN: 2347-7237 Volume 5, Issue 1 www.stmjournals.com
Automation of Heat Exchanger System using DCS Archana B. Yadav*, Dhruv M. Patel Instrumentation and Control Engineering Department, Sardar Vallabhbhai Patel Institute of Technology, Vasad, Gujarat, India
Abstract Heat exchangers are built for efficient transferring heat from one fluid to another. They have an extensive demand in areas such as petroleum, refineries, chemical plants, petrochemical plants, natural gas processing, refrigeration, power plants, air conditioning, space heating and process industry. Automation of Heat exchange can be done optimally using PID Block. Using PID function block the outlet fluid temperature can be maintained as desired. The automation of Shell and tube type heat exchanger using Distributed Control System (DCS) is represented in this research paper. Automation is done using PID block in DCS. The input to PID block is measured variable (temperature of Inlet water) and the set point is desired value of the Outlet water temperature. The manipulated variable is the steam flow rate. As per the changes in the process temperature and the settings of P action, I action and D action, the output of the PID block is calculated and the steam valve opening is varied to maintain the water temperature. The values for proportional gain, integration time and derivative time are adjusted to optimize process performance.
Keywords: Distributed Control System (DCS), heat exchanger, proportional mode, integral mode, derivative mode, PID (Proportional Integral Derivative) mode
JoCI (2014)Š STM Journals 2014. All Rights Reserved