Faculty Publications
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Publications by NITK Faculty
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Item Improved Algorithm for Minimum Power 2-Connected Subgraph Problem in Wireless Sensor Networks(Institute of Electrical and Electronics Engineers Inc., 2018) Lakshmi, M.; Shetty D, D.A Wireless Sensor Network (WSN) consists of small sensor nodes which communicate with each other using wireless radio channel and are used to monitor certain environmental parameters. Since the nodes are powered by a small battery of limited capacity, it is important to minimize the energy consumption in a WSN. By using an appropriate topology the energy utilization of the network can be minimized which results in an increased lifetime of a WSN. In practice, the transmission power of a sensor node can be tuned to obtain a required topology that satisfies certain connectivity constraints and this problem is known as Range Assignment Problem. For a given network, a reduced topology is constructed satisfying some connectivity constraints like k-connectivity, bounded diameter etc. Fault tolerance addresses the issue of node or link failure which aims at k-connectivity so that, the network has at least k vertex disjoint paths between any two nodes of the network. With the motivation of achieving fault tolerant network with minimum transmission energy, we consider Minimum power 2-connected subgraph (MP2CS) problem which is proved to be NP-hard. A polynomial time heuristic is proposed in this paper for the MP2CS problem and simulation is performed to compare with the existing algorithm. © 2018 IEEE.Item Design of an adaptive and reliable network on chip router architecture using FPGA(Institute of Electrical and Electronics Engineers Inc., 2019) Parane, K.; Prabhu Prasad, B.M.; Talawar, B.We propose an adaptive, low cost, reliable and high performance router implemented based on a conventional two stage pipeline. The proposed Adaptive routing operates in adaptive mode as soon as the congestion is detected in network. We employ fault tolerant strategies for different components of routers such as input buffer, route compute unit, virtual channel allocation, switch allocation, and crossbar unit. The proposed router architecture differs from existing reliable routers, our implementation maintains the performance of fault tolerance router under massive network workloads by influencing the features of a crossbar, routing algorithm and router pipeline optimization. Our designed router is highly reliable than current fault receptive routers such as Wang[1], Vicis[2], BulletProof[3], RoCo[4] and Poluri[5]. The average latency is reduced by 0.69% and increased by 2.0% compared to fault tolerant and conventional router. © 2019 IEEE.Item Fault-Tolerant Operation of Switched Reluctance Motor Using Cascaded Current and PWM Control With Effect of Commutation Angle Variation(Institute of Electrical and Electronics Engineers Inc., 2024) Reddy, J.S.; Parthiban, P.This paper presents a proposed fault-tolerant control strategy for Switched Reluctance Motor (SRM) drives, utilizing cascaded current and pulse width modulation (PWM) control mechanisms with commutation angle variation. The study systematically evaluates the mechanical performance of SRM drives by regulating voltage and current to achieve robust dynamic response under various fault conditions. Optimal commutation angles are identified to enhance operational efficiency and balance performance under fault scenarios. The comprehensive simulations use a 4 kW, 4 φ, 8/6 SRM model in MATLAB/Simulink; further, real-time experiments are conducted using FPGA-based modelling with a Controller Hardware-in-Loop (CHIL), setup on the OPAL-RT 4510 platform. The proposed control technique demonstrates high fault tolerance and reliable mechanical performance, making it suitable for variable-speed drive applications. The findings underscore the potential of the proposed control strategy to ensure the robust operation of SRM drives in practical implementations, highlighting its significance for enhancing the reliability and efficiency of electric drive systems. © 1972-2012 IEEE.Item Vibration reduction and intelligent control in SRM using optimised two stage commutation(Inderscience Publishers, 2025) Wilson, V.; Latha, P.G.; Jose, N.; Bhaktha, S.Switched reluctance motors (SRMs) have grown in popularity in a variety of industrial applications due to their inherent benefits such as high fault-tolerance, simplicity, affordability, and rare-earth free nature. However, the generation of undesirable vibrations due to radial force variations remains a significant challenge. Two stage commutation based on active vibration cancellation (AVC) is an effective method to reduce these vibrations. The focus of this paper is to address the major limitation with two stage commutation, namely the extended tail current causing increased copper loss. This is accomplished with optimal commutation parameters employing particle swarm optimisation (PSO) method. A MATLAB/Simulink model of SRM with vibration signal is developed and is used for demonstrating vibration cancellation. An intelligent control is also implemented which can track the dynamic changes in speed-load conditions. This paper showcases that this approach is an effective solution to reduce the vibrations issues in SRM, thereby improving the overall performance of the motor for industrial applications. © © 2025 Inderscience Enterprises Ltd.