National Institute of Technology, Meghalaya

About: National Institute of Technology, Meghalaya is a education organization based out in Shillong, India. It is known for research contribution in the topics: Control theory & Electric power system. The organization has 503 authors who have published 1062 publications receiving 6818 citations. The organization is also known as: NIT Meghalaya & NITM.

A comparative study in prediction of surface roughness and flank wear using artificial neural network and response surface methodology method during hard turning in dry and forced air-cooling condition

Abstract: In the present work, a turning operation is performed in a green environment of dry and forced air-cooled condition to avoid the flooded coolant or minimum quantity lubrication. The work piece material considered is hardened AISI D2 steel (48 HRC) and the tool material is tungsten coated carbide tool. Cutting speed (v), feed rate (f) and depth of cut are taken as process parameters and surface roughness, flank wear, cutting force and feed force as performance parameters. Dry turning (DT) is found to be favourable for minimising surface roughness, cutting force and feed force, while air-cooled turning (ACT) is favourable for reducing flank wear. Artificial neural network (ANN) and response surface methodology (RSM) models have been developed for prediction of surface roughness and flank wear. Regression coefficient (R2), confirmed that ANN model is better as compared to that of RSM model.

Application of Multi Level ATM in Reducing Latency in Clouds for Performance Improvement of Integrated Voice, Video and Data Services

Abstract: A study to apply binary ATM in reducing latency and packet error probability in cloud for integrated voice, video and data is made in the paper. Studies reveal the superiority of binary ATM to conventional ATM.

A Novel Modified Digital PWM Control Technique to Reduce Speed Ripples in BLDC Motors

Abstract: With all the recent advancement in the domain of permanent magnet brushless dc (BLDC) motor control, many of the advanced and low cost control schemes are proposed. Despite of having multiple constructions based inherent advantages like reduced maintenance cost, high torque to weight ratio and others, BLDC motors still find sparse commercial applications. Conventionally used induction and dc machines have low initial cost and also are rugged. If maintenance cost, efficiency and volume are solely considered BLDC motors is undoubtedly the most preferable option. However, the extra cost involved with the compulsory power electronic converter to drive the motor makes the industries reluctant towards BLDC motor applications. Digital pulse width modulation (DPWM) technique was introduced to eliminate the usage of costly processors involved for the switching control of the converter. Digital PWM control is a simple approach and also can be implemented in reduced cost application specific integrated circuits (ASIC). The main disadvantage of digital PWM is the speed and torque ripples generated due to fixed duty cycles of the converter. This paper introduces a new modified digital PWM technique to eliminate the speed ripples in BLDC motor. The controller is designed in simulation environment and the same is also validated.

Three-phase grid-tied photovoltaic system with an adaptive current control scheme in active power filter

Abstract: In this article, an adaptive normalized least mean fourth (NLMF) control scheme is employed to generate the anti-harmonic currents of photovoltaic (PV) integrated with grid system for harmonic elim