Kongu Engineering College

About: Kongu Engineering College is a based out in . It is known for research contribution in the topics: Cluster analysis & Control theory. The organization has 2001 authors who have published 1978 publications receiving 16923 citations.

An efficient recognition system for preserving ancient historical documents of English characters

Abstract: The clusters of historical documents are of great importance in terms of cultural and scientific In order to access the documents, originality should be maintained So conversion of digital form is highly required for recognition While converting, those documents may be due to poor quality, overlapping of characters, complex background and so on In this paper, an efficient system for recognizing English characters from degraded historical document images is proposed Initially, modified Adaptive Thresholding based binarization process is performed to eliminate the noise content in the input image The characters are segmented through the rectangular bounding box method Then Local binary pattern (LBP) algorithm is enforced to extricate the features of each characters Finally, Spatial Pyramid Matching (SPM) classifier is used for texture classification HDLA 2011 dataset is employed to validate the proposed method The proposed method achieves 946% recognition accuracy and 034 s computation time for Lucida Black-letter font This method also outperforms better than the existing recognition techniques

Continuous monitoring of power consumption in urban buildings based on Internet of Things

Abstract: Buildings consume a large portion of energy; the major consumption is due to improper use of electrical equipment. Thus, energy efficiency in buildings has become a priority at every level within t...

An adaptive current control strategy for a three phase Shunt Active Filter

Abstract: A new control algorithm implemented with Adaptive Hysteresis Current Control technique for Shunt Active Filter is proposed. A three-phase six-pulse converter with resistive load is considered as the non-linear load. Many switching methods are used to produce switching pulse which leads to the generation of reference current. Hysteresis Current Control is widely used due to its simplicity in implementation, fast and accurate response. However, the main issue is its variable switching frequency which leads to extra switching losses and injecting high-frequency harmonics into the system current. To solve this problem, an Adaptive Hysteresis Current Control has been introduced which produces hysteresis bandwidth which instantaneously results in smoother and constant switching frequency. By this technique the overall Total Harmonic Distortion rate has been reduced than the Hysteresis Current Control technique. The design concept of the proposed Shunt Active Filter using the PI based control algorithm is verified through simulation and the results proved the effectiveness of the proposed algorithm

Design and Development of Digital Control Strategy for Solar Photovoltaic Inverter to Improve Power Quality

Abstract: The design and development of control circuit for a solar fed cascaded multilevel inverter is postulated in this paper. The control circuit based on logic operations reduces the semiconductor switches required for the multilevel inverter. In addition to the reduction of switches, it also improves the quality of the output power by minimizing the Total Harmonic Distortion (THD). The proposed design achieves the maximum output voltage levels without the requirement of detailed look up table, boost converters and output transformers. The implementation of multilevel inverter is carriedout with asymmetrical DC sources from solar photovoltaics to achieve 2 ns+1 -1 and 3 ns levels, where ns is the number of individual inverter stages. Based on the proposed design 12 switches are required to achieve 15 and 27 levels respectively, whereas the conventional inverter can able to produce only 7 levels. MATLAB/Simulink is used for the simulation of the system. The modelling of solar panel which adheres to the experimental setup is developed. A 3kWp solar plant is taken into consideration for the implementation of the proposed control design and the performance parameters are measured using power quality analyser. The results are compared with the conventional inverter which shows that the proposed inverter is much suitable for both standalone and grid connected systems.

Experimental investigations of vibration and acoustics signals in milling process using kapok oil as cutting fluid

Abstract: Vegetable oils are found as the feasible alternative for conventional minerals oils. There has been many environmental and health issues which are spotted with the use of conventional cutting fluids. There has been a great demand for developing new environmentally friendly vegetable based cutting fluids to reduce these harmful effects. In this present study, vegetable based kapok oil is used as a cutting fluid during milling to study its consequences over other conventional oils. The process parameters such as spindle speed, depth of cut and feed rate were optimized with respect to the flank wear (Vb ) and surface roughness (Ra ) respectively with the use of central composite design in response surface methodology (RSM). Further an attempt has been made to monitor the tool condition by measuring the cutting force, vibration and sound pressure simultaneously. Three different tool conditions such as dull, fresh and working were analyzed and their consequences were also reported. Also, the performance of the kapok oil is compared with the palm oil and mineral oil (SAE 20W 40). The feed rate has the major contribution for surface roughness and flank wear. It is found that the cutting force (F), sound pressure (p ) and vibration (V) increases with the tool wear.