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Augustine A.,PRIST University | Antony R.,Vimal Jyothi Engineering College | Raju J.,METS Schoolof Engg. Mala
International Journal of Applied Engineering Research | Year: 2015

One of the major concerns in electricity industry today is power quality. It becomes especially important with the introduction of advanced and complicated devices, whose performance is very sensitive to the quality of power supply. Power Quality (PQ) has become an important issue to electricity consumers at all levels of usage. The PQ issue is defined as “Any power problem manifested in voltage, current, or frequency deviations that results in failure of customer equipment.” The development of power electronic based equipment has a significant impact on quality of electric power supply. Power Quality (PQ) has become an important issue to electricity consumers at all levels of usage. The main causes of a poor power quality are harmonic currents, poor power factor, supply-voltage variations, etc. To mitigate power quality problems, we have various equipments like active filter, passive filter, unified power flow controller and unified power quality conditioner etc. Among from them unified power quality conditioner was widely studied by many researchers as an eventual method to Improve power quality of electrical distribution System. The proposed IPQC has ultimate capability to improve the power quality at the point of installation on power distribution systems and industrial power systems. Artificial intelligence based gain scheduling is an alternative technique commonly used in designing controllers for non-linear systems. Fuzzy system transforms a human knowledge into mathematical rule base. The conventional performance of UPQC is improved using the optimization method like Fuzzy Logic. The performance of the proposed system was analyzed through simulations with MATLAB software. © Research India Publications.

Venu C.,National Institute of Technology Tiruchirappalli | Ramesh S.T.,National Institute of Technology Tiruchirappalli | Gandhimathi R.,National Institute of Technology Tiruchirappalli | Nidheesh P.V.,National Institute of Technology Calicut | Nidheesh P.V.,Vimal Jyothi Engineering College
Separation Science and Technology (Philadelphia) | Year: 2016

In this study, the phosphorous removal efficiency of partitionable-space enhanced coagulation (PEC) technology has been investigated. A series of continuous experiments was conducted to find out the influence of operating parameters. With increase in the elapsed treatment time, the phosphorus removal rates improved progressively during 1.5–3 h and the reactor reached a steady state after 4 h. This improved performance is mainly attributed to the partitionable-space and “flocculation filter” in the PEC reactor which enhanced the coagulation process. The flocs formed exhibited excellent settling characteristics by quickly settling out within the first 15 min. © 2016 Taylor & Francis

Cr S.,Vimal Jyothi Engineering College | Joseph N.,Vimal Jyothi Engineering College | Samson N.,Vimal Jyothi Engineering College | Jose P.,Vimal Jyothi Engineering College | Subramanian M.E.P.,Sengunthar Engineering College
2013 International Conference on Computer Communication and Informatics, ICCCI 2013 | Year: 2013

Quality assurance is the systematic monitoring and evaluation of the various aspects of a product to maximize the probability that minimum standards of quality are being attained by the production process. Deviations from the normal quality that impair the operating characteristics of a metal or product and lead to a reduction in grade or to rejection of products should be considered as defects. To achieve zero defects ('Zero ppm') output cost-effectively, manufacturers are making the commitment to move to online, automated Non Destructive Testing (NDT) methods. One of the major difficulties with real-time image acquisition is redundancy due to continuous scanning of scenes. The proposed NDT method is a interface predictive coding & is one of the most powerful image coding techniques that can control the redundancy and blur and can identify microscopic casting defects and cracks automatically, which may be even internal fault in nature and measure them by intelligent object detection and feature extraction tools. The paper introduces the Four Step Search matching based automated visual quality inspection and NDT employed using intelligent object detection which have many advantages over existing methods and feature extraction in ultrasonic ToFD scan images as a tool in the automated visual inspection and NDT. © 2013 IEEE.

Manohar M.,Vimal Jyothi Engineering College | Sarin C.R.,Vimal Jyothi Engineering College | James P.,Vimal Jyothi Engineering College | James L.,Vimal Jyothi Engineering College
2014 Power and Energy Systems Conference: Towards Sustainable Energy, PESTSE 2014 | Year: 2014

Electricity supply is rapidly becoming more complex and variable where energy efficiency rules are still evolving only to limited end. A near future with millions of electric vehicles and industrial loads will dramatically increase the necessity of a demand modulation system. The best way of practicing demand management is user responsive load management at the consumer ends. It will be difficult to alter consumer behavior in the direction of energy savings unless consumers are more exposed to market prices than at present. The proposed system introduces a distributed smart meter that intelligently notifies the power consumption rate at various time intervals based on demand factors and power loss factors. It also notifies the characteristic behavior of consumption to the consumer via GSM communication system, and isolates the supply for various faults and power theft. A new intelligent TLPF algorithm has been implemented that confronts all these features and executed using a SCADA controller. © 2014 IEEE.

Jose C.P.,Vimal Jyothi Engineering College | Meloth G.,Canara Engineering College
Proceedings of the 2014 International Conference on Advances in Energy Conversion Technologies - Intelligent Energy Management: Technologies and Challenges, ICAECT 2014 | Year: 2014

This paper investigates a method to extract maximum mechanical power that can be generated from a wind turbine at a particular wind speed and feeding the generated power to the grid. The generator used is a Permanent magnet synchronous generator which is a variable speed generator. The pitch angle control to enable protection of the Wind Energy Conversion System from mechanical damages is also presented. The simulation of the integration of the system to the Grid and Maximum Power Point Tracking is performed using MATLAB/SIMULINK software and results are successfully presented. © 2014 IEEE.

Rajan E.,Vimal Jyothi Engineering College | Sebastian B.,CECG | Shinu M.M.,Vimal Jyothi Engineering College
Advances in Intelligent Systems and Computing | Year: 2016

Actuators are used to provide Thrust Vector Control (TVC) for lifting the launch vehicle and its payload to reach its space orbits. The TVC comprises actuation and power components for controlling the engines direction and thrust to steer the vehicle. Here the actuator considered is a linear Electromechanical Actuator (EMA) system. The design is based on the Model Reference Adaptive Controller (MRAC) technique. It calculates an error value as the difference between actual system and desired model and attempts to minimize the error by adjusting the controller parameters. Adaptive control laws are established with the gradient method. The experimental result shows that the MRAC has better tracking performance than that with the traditional compensated system when both controllers are subjected to the same parameter variations. The simulation is done using MATLAB/SIMULINK software. © Springer International Publishing Switzerland 2016.

Krishnamoorthy A.,Manipal University India | Anita S.,Vimal Jyothi Engineering College
Structures | Year: 2016

A numerical model for the seismic analysis of a structure isolated with friction pendulum system (FPS) considering soil structure interaction (SSI) is developed. In the analysis, the soil is considered as an elastic continuum and is modeled using finite element method. Three degrees of freedom (two translational and one rotational) are considered for the structure whereas the soil is modeled using plane strain element with two translational degrees of freedom. Sliding and non-sliding phases of FPS are modeled using a fictitious spring. Effects of considering soil structure interaction on a multi-degree-freedom structure isolated with friction pendulum system is investigated using the proposed method. A parametric study is also carried out to investigate the influence of flexibility of soil, type of earthquakes, frequency content of earthquake ground motions, friction coefficient of sliding material, isolation time period, number of floors and the time period of fixed base structure on the response of isolated structure with SSI. The results of the numerical study show that the SSI affects the response of the structure isolated with FPS and in many cases, the response of the structure increases due to SSI. © 2015 Elsevier B.V.

Nidheesh P.V.,National Institute of Technology Calicut | Nidheesh P.V.,Vimal Jyothi Engineering College | Rajan R.,National Institute of Technology Calicut
RSC Advances | Year: 2016

Iron loaded activated carbon (IAC) was used as an effective heterogeneous catalyst for generating hydroxyl (via Fenton reactions) and sulphate radicals (via persulphate oxidation), and it tested for the degradation of rhodamine B (RhB) from a water medium. The loading of iron was characterized by SEM, N2 adsorption-desorption isotherm analysis and XRD techniques, and an effective loading of iron oxides over the activated carbon (AC) was observed. The effects of catalyst amount, persulphate concentration, dye concentration, and solution pH on the dye removal efficiency were analyzed. Compared to Fenton oxidation (FO), persulphate oxidation (PO) of dye was found to be very effective at all the tested conditions. The RhB removal efficiencies at pH 3, 6 and 9 were 92.5%, 95% and 93%, respectively, for FO and 99%, 96% and 98%, respectively, for PO. More than 40% mineralization efficiency was observed for both the processes at the optimal conditions. The removal of RhB occurred by degradation of the chromophore ring in the presence of hydroxyl radicals, whereas the dye removal occurred by de-ethylation in the presence of sulphate radicals. At lower pH condition, the sorption of dye over AC was very less, indicating effective dye degradation. The results indicate that IAC is an effective catalyst for dye degradation from an aqueous solution. © 2016 The Royal Society of Chemistry.

Aswathy P.,National Institute of Technology Tiruchirappalli | Gandhimathi R.,National Institute of Technology Tiruchirappalli | Ramesh S.T.,National Institute of Technology Tiruchirappalli | Nidheesh P.V.,National Institute of Technology Calicut | Nidheesh P.V.,Vimal Jyothi Engineering College
Separation and Purification Technology | Year: 2016

A batch electrocoagulation study was conducted using aluminium electrodes to check the treatability of synthetic bilge water. The studies were conducted to investigate the effect of various operational parameters on the treatment efficiency. At a pH of 7, applied voltage of 10 V, spacing of 1 cm and effective electrode area of 45 cm2, a maximum soluble COD (CODS) removal efficiency of 85% was obtained after an electrolysis time of 120 min. The second order rate constant was derived and a maximum rate constant of 3 × 10-6 L/mg-min was observed at optimum experimental conditions. CODS experimental measurements give an acceptable fit for both Langmuir model and Freundlich isotherm models. A comparative study between electrocoagulation and chemical coagulation was performed and chemical coagulation showed only 59.3% removal efficiency. The sludge formed after the electrocoagulation process was characterized for mineral composition and functional groups. XRD and FTIR results represent the formation of aluminium hydroxide during electro coagulation process and the presence of hydrocarbons and heavy metals in the sludge indicates the removal of these pollutants from bilge water by electrocoagulation process. Among different electrode combinations of aluminium and iron, Al-Al combination showed maximum removal efficiency. A case study on real bilge water was conducted and a maximum removal of 89.84% was obtained at optimum conditions using aluminium electrodes. © 2015 Elsevier Ltd. All rights reserved.

Seena V.,Vimal Jyothi Engineering College | Yomas J.,Vimal Jyothi Engineering College
Proceedings of the IEEE International Caracas Conference on Devices, Circuits and Systems, ICCDCS | Year: 2014

The electrocardiogram is a technique of recording bioelectric currents generated by the heart which is useful for diagnosing many cardiac diseases. The feature extraction and denoising of ECG are highly useful in cardiology. Wavelet based methods present best performance as irregularity measures and makes them suitable for ECG data analysis. This paper proposes comparison of different feature extraction and denoising techniques using wavelet transform. In an ECG with P-QRS-T wave, QRS complex has the most striking part for analysis. The first part of the paper deals with comparison of three different feature extraction techniques using wavelet transform. The second part deals with the denoising of ECG signal using three different wavelet transform. The most troublesome noise sources contain frequency components within ECG spectrum, i.e. electrical activity of the muscles and instability of electrode skin contact. Such noises are difficult to remove using typical filter procedure. In such cases signal noise reduction is only possible with wavelet denoising techniques. The comparison of different wavelet transform techniques for feature extraction and denoising of ECG signal is mentioned, which is suitable for the selection of most applicable techniques. Wavelet transform is a powerful tool for the analysis of ECG signal. © 2014 IEEE.

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