Informatics Publishing Limited

M. Ranjani ¹, P. Murugesan ²

Affiliations
1 Department of Electrical and Electronics Engineering Sathyabama University, Chennai, Tamilnadu, IN
2 Department of Electrical and Electronics Engineering S.A.Engineering College, Chennai, Tamilnadu, IN

Abstract

This paper proposes a Fuzzy logic based dc motor fed with an single input dc-dc converter based on Quasi-Z-source converters. The PI algorithm is the most popular feedback controller used within the process industries. It is robust easily understood algorithm that can provide excellent control performance despite the varied dynamic characteristics of process plant. But the tuning of the PI controller parameters is not easy and does not give the optimal required response, especially with non-liner systems. In the last years emerged several new intelligent techniques like, Fuzzy logic controller. This paper deals the non-liner mathematical model and simulation for speed control of separately excited D.C. motor with closed loop PI controller. The conventional PI technique is represented as a point of comparison. The intelligent technique: FLC is proposed to tune the PI controller parameters. The obtained results of the closed loop FLC-PI Controller response shows the excellent response with comparing to the conventional PI, a good results gives in FLC-PI Controller. The simulation results presented in this paper show the effectiveness of the proposed method, which has got a wide number of advantages.

Keywords

Proportional Integral Controller (PI), Fuzzy Logic Controller (FLC), Quasi-Z-source DC/DC Converter (qZSC), Direct Current (DC)

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Lavanya Dhanesh ¹, P. Murugesan ²

Affiliations
1 Sathyabama University, Chennai, IN
2 S.A. Engineering College, Chennai, IN

Abstract

The main objective of the research is to improve the performance of the CPU at software level by reducing the Interrupt Latency of the Real time systems. Interrupt Latency provides an important metric in increasing the performance of the Real Time Kernal. So far the research has been investigated with respect to real-time interrupt latency reduction using non-pre-emptive task scheduling algorithms. A general disadvantage of the non-preemptive discipline is that it introduces additional blocking time in higher priority tasks, so reducing schedulability. If the interrupt latency is increased, the task switching delay shall be increasing with respect to each task. Hence most of the research work has been focussed to reduce interrupt latency by using the Pre-emptive Task scheduling algorithm. Based on the literature survey, A Deadline Monotonic Priority Assignment technique is used to reduce the latency with respect to the deadline. Deferred pre-emption scheduling and Fixed pre-emptive scheduling algorithm are used to reduce the interrupt latencies based on the queue fixed to the priority of the tasks to be handled. Here we suggest a new algorithm named "Priority Pre-emptive task scheduling algorithm" which preempts and serve the task with highest priority and also concentrates on the low priority tasks during the buffering time of the higher priority tasks. This paper presents a survey of the existing algorithms used for reducing interrupt latency and compares them under different metrics, providing both qualitative and quantitative performance evaluations.

Keywords

Interrupt Latency, Schedulability, Deadline Monotonic Priority Assignment, Fixed Pre-Emptive Scheduling Algorithm

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P. Venkataraman ¹, M. Sridhar ¹, S. Dhanammal ¹, P. Murugesan ¹, J. Arunakaran ¹, N. Srinivasan ¹, M. M. Aruldhas ¹

Affiliations
1 Department of Endocrinology, Dr. ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai-600113, IN

Abstract

Effects of quercetin, vitamin C and E on PCB exposed ventral prostaitc zinc content were studied in adult albino rats, a group of 20 rats were treated with Aroclor 1254 (2 mg/kg bwt/day/IP) for 30 days. Five rats were treated as PCB control. The remaining 15 rats were subdivided into the following subgroups of five animals each. They were given vitamin C (500 mg/kgbwt/day/oral) for 10 days; vitamin E (50 mg/kg bwt/day/oral) for 10 days; quercetin (2 mg/kg bwt/day/oral) for 10 days.

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P. Murugesan ¹, J. Senthilkumar ¹, K. Balasubramanian ¹, M. M. Aruldhas ¹, P. Govindarajulu ¹, J. Arunakaran ¹

Affiliations
1 Department of Endocrinology, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai-600 113, IN

Abstract

To find out the effect of polychlorinated biphenyl compound Aroclor 1254 on rat Leydig cellular antioxiSant system, adult male rats were exposed to Aroclor 1254 (2 mg/kg b.wt.) mixed with com oil through intraperitoneal (ip) injection daily for 30 days. The control rats were administered com oil as vehicle. Testes were removed on the both groups and Leydig cells were isolated by enzymatic digestion and purified on discontinous percoll gradient.

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S. Jaanaa Rubavathy ¹, P. Murugesan ²

Affiliations
1 SRR Engineering College, IN
2 S.A Engineering College, IN

Abstract

This paper presents a multi-output series resonant inverter for induction heating cooking appliances, which employs asymmetric voltage cancellation control, a generalized control technique for resonant inverters for output voltage control. It ensures better efficiency performances than conventional control strategies. The objective of this work is to model and simulate closed loop controlled multi output series resonant inverter system. The synthesized converter can be considered as a two output extension of a full bridge inverter. This full bridge inverter can control the two outputs, simultaneously and independently, up to their rated powers, which reduces the number of components required as compared with traditional approach. It also ensures higher utilization of switches used for its operation. A closed loop controlled two output series resonant inverter system is modeled and simulated using Simulink. The results of closed loop system are presented.

Keywords

Asymmetric Voltage Control, Induction Heating Cooking Appliances, Series Resonant Inverter.

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M. Ranjani ¹, P. Murugesan ²

Affiliations
1 Electrical and Electronics Engineering Department, Sathyabama University, Chennai, Tamilnadu, IN
2 Department of Electrical and Electronics Engineering, S.A. Engineering College, Affiliated with Anna University, Chennai, Tamilnadu, IN

Abstract

This paper presents the design methods of Fuzzy logic controller using the genetic/evolutionary algorithms which are appearing as systematic methods now-a-days. This method easily provides an optimized design and forms the base for further process. This paper describes the design of PI-like FLC based on Genetic fuzzy optimization concepts. The proposed method has its simple structure that comprises of three gain factors associated with FLC which has two inputs and one output. The proposed method is applied to the problem of designing a GA tuned PI like Fuzzy speed controller (GA-FLC) for a ZVS QRC fed DC drive. The performance of the proposed work is compared with that of the conventional FLC (CFLC) for a ZVS QRC fed DC drive. It can be evaluated that the GA-FLC performs better than the conventional FLC with reduced overshoot and minimized steady state error.

Keywords

Zero Voltage Switching (ZVS), Quasi Resonant Converter (QRC), Proportional Integral (PI), Conventional Fuzzy Logic Controller (CFLC), Genetic Fuzzy Controller (GA-FLC).

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R. Premalatha ¹, P. Murugesan ²

Affiliations
1 Sathyabama University, Chennai, IN
2 S.A Engineering College, Chennai, IN

Abstract

This paper deals with modeling and simulation of Zero Voltage Switching Pulse Width Modulation Three Level DC to DC Converter for Open Loop Operation with C and π-Filter . DC Input voltage of 220V is stepped down to 48V using an efficient DC to DC Converter. Direct current is converted into high frequency Alternating current using Three Level Inverter. The Output of Inverter is stepped down and converted into DC using an controlled rectifier. This circuit has advantages like reduced transformer size and reduced filter requirement. The oscillations and voltage stress of the input voltage is reduced by the two clamping diodes ,in the meanwhile, all the switches turn on and off at zero voltage in this paper. The Operation principle of open loop DC-DC converter with π-Filter was analysed.

Keywords

Pulse-Width-Modulation, Soft-Switching, Three-Level Converter, Zero Voltage Switching.

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M. Ranjani ¹, P. Murugesan ²

Affiliations
1 Department of Electrical and Electronics Engineering, Sathyabama University, Chennai, Tamilnadu, IN
2 Department of Electrical and Electronics Engineering, S.A. Engineering College, Chennai, Tamilnadu, IN

Abstract

In this paper, a fuzzy-genetic approach based controller for a buck converter is designed and modelled in Matlab/Simulink. Proposed controller uses a Takagi-Sugeno type fuzzy logic controller to regulate output dc voltage and a hysteresis current controller to force the input current to track a reference. Optimal values of fuzzy logic controller are determined by genetic algorithm. To indicate the steady state and transient performance, some simulation results are presented.

Keywords

Fuzzy Logic Controller (FLC), Buck Converter (BC), Genetic Algorithm (GA), Integral Absolute Error (IAE), Direct Current (DC).

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P. Murugesan ¹, A. Shanmugam ²

Affiliations
1 Department of Computer Applications, Bannari Amman Institute of Technology, Sathyamangalam – 638401, IN
2 Bannari Amman Institute of Technology, Sathyamangalam – 638401, IN

Abstract

The World Wide Web is a vast network of documents that are linked together a set of protocols defining how the system work and transfer data. The explosion of data traffic on the World Wide Web (WWW), web servers are often experiencing overload from an increasing number of users accessing the servers at the same time. With increased popularity of web, there are a number of problems such as Servers overloaded, Internet Backbone congestion and Slow web services access, etc.,. To address the performance and scalability problems of web servers, more virtual servers and mirror servers were developed with many load balancing approaches. Among the many other approaches for efficient load balancing in distributed heterogeneous P2P networks, Dynamic Time Warping (DTW) approach and Arbitrary Selection Load Balancing (ASLB) approaches plays a vital role. This paper mainly focuses on comparative study of Dynamic Time Warping (DTW) and Arbitrary Selection Load Balancing (ASLB) approaches to Heterogeneous P2P Networks.

Keywords

Dynamic Time Warping, Heterogeneous, Load Balancing, Peer to Peer Network, World Wide Web.

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N. Selvaraj ¹, P. Murugesan ², V. Alagupandi ³

Affiliations
1 Department of Commerce, Saraswathi Narayanan College, IN
2 Department of Management studies, Madurai Kamaraj University College, IN
3 Department of Management studies, Institute of Cooperative Management, IN

Abstract

The attributes may vary according to the individual taste, experience, and like. The second one is that, the consumer is likely to attach different importance weights to the relevant attributes namely attributes importance and attributes salience. In the customer’s evaluation towards purchase of a car, three additional factors also intervene. The first is the attitude of others. If the wife of customer thinks that the proposed car is pretentious, his favourable attitude is reduced. The post purchase cognitive disagreement is common among purchases of, homes, automobiles, and major appliances. According to Festinger, “The magnitude of post decision disagreement is an increasing function of the general importance of the decision and of the relative attractiveness of the unchosen alternatives”. The Consumer form their expectations on the basis of messages, claims sent out by the seller, through blogging, internet, advertisements, media and other communication sources. If the seller makes exaggerated claims for the product, the consumer experiences disconfirmed expectations, which lead to dissatisfaction. The contrast theory says that the amount of dissatisfaction will be larger than the performance gap. But it may change due to the influence of various economic, cultural and environmental factors. It is vital to find out the determinants of the behaviour and intention of the customer in purchasing a small car. Also their expectations and delivery of services in the areas of tangibles, individualized attention, performance, assurance and empathy or courtesy. As these dimension are prime importance for any car manufacturing company, they generate interest in knowing the factors which give rise to customer satisfaction.

Keywords

Attributes, Evaluation, Perception, Behaviour and Customer.

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N. Selvaraj ¹, P. Murugesan ², V. Alagupandi ³

Affiliations
1 Department of Commerce, Saraswathi Narayanan College, IN
2 Department of Management Studies, Madurai Kamaraj University College, IN
3 Department of Management Studies, Institute of Cooperative Management, IN

Abstract

Unless there is good environment for starting Automobile industries, it is not possible to survive in the industry. The State Government of Tamil Nadu, encourages these industries to start the units, by offering as many as concessions, like providing land in cheaper cost, providing infrastructural facilities namely electricity, water and roads. Except the variable “Broad wheel base”, all the other nine variables were highly perceived by the male and female customers. The significant difference of perception was found in only one variable that is “Broad Wheel Base”. Hence, it is concluded that, the male and female customers like the car fitted with latest technologically, newly developed accessories and systems, since they think alike in respect of all the nine variables. The significant difference of perception among the two types of customers belong to joint and nuclear families with regard to the variables namely, since fully automatic, Eco friendly and drivability in traffic is good. It is concluded that, both the above two types of customers, prefer a car developed with latest technology. The present day customers are more aware of the latest technological developments in automobile sector. So every customer gives more important that his car should have provided with the latest technologies. In line of the above, they have preferred the car with latest technology, having power steering, air bags, ABS break system and eco-friendly with less emission of CO2 (Euro IV model), drivability in traffic was also considered by them. The Total Productivity Maintenance (TPM) will give effective programme in terms of increased plant efficiency and productivity. It is a competitive strategy aimed at enhancing the productivity of men, machine, method and to maintain the level consistently involving the people at level and functions of management. Failure Mode and Effect Analysis (FMEA) should be done.

Keywords

Automobile, Manufacturing, Perception, Technological and Customer.

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