Conference Papers
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Item Reconfigurable Triple Modular Redundant and N-Modular Redundant systems with variable Reliability in multi-processor environment(IEEE Computer Society help@computer.org, 2012) Aithal, S.; Krishna Kumar, S.Voting Logic (VL) is an important component of Triple Modular Redundant (TMR) and N-Modular Redundant (NMR) systems. A number of voting logic designs are presented in this paper. The Design Profile, Diagnosability and Reliability calculation of a word voter for TMR system is presented. © 2012 IEEE.Item Speech synthesizer with speculative multithreading and speculative computation reuse(IEEE Computer Society help@computer.org, 2013) Suma, S.; Gopalan, N.P.Speculative multithreading and speculative computation reuse uses profiles for exploiting and to increase the cache memory performance. Currently proposed multithreaded processors try to improve on execution of number of instructions in each clock cycle. Even the general purpose applications can enchance the Instruction level parallelism through these techniques. Hence in this paper we are proposing an idea of the hybrid technique of both multithreading and instruction reuse to enhance the performance and execution rate comparatively with the sequential computation. We are also computing the thread interval for the reliability testing such that at what interval the value to be passed from the producer thread to the consumer thread. © 2013 IEEE.Item Analysis of systems subject to on - Line preventive maintenance(International Society of Science and Applied Technologies issatconferences.org, 2014) Murulidhar, N.N.This paper deals with the analysis of systems subject to on-line preventive maintenance. An expression for the system reliability of a one unit system subject to on-line PM action is obtained by using regeneration point technique.Item RPRDC: Reliable Proliferation Routing with low Duty-cycle in Wireless Sensor Networks(Elsevier, 2015) Venkatesha, n.; Ashwini, T.N.; Akshay, A.L.; Tejaswi, V.; Venugopal, K.R.; Iyengar, S.S.; Patnaik, L.M.Ensuring reliable energy efficient data communication in resource constrained Wireless Sensor Networks (WSNs) is of primary concern. Traditionally, two types of re-transmission have been proposed for the data-loss, namely, End-to-End loss recovery (E2E) and per hop. In these mechanisms, lost packets are re-transmitted from a source node or an intermediate node with a low success rate. The proliferation routing1 for QoS provisioning in WSNs low End-to-End reliability, not energy efficient and works only for transmissions from sensors to sink. This paper proposes a Reliable Proliferation Routing with low Duty Cycle [RPRDC] in WSNs that integrates three core concepts namely, (i) reliable path finder, (ii) a randomized dispersity, and (iii) forwarding. Simulation results demonstrates that packet successful delivery rate can be maintained upto 93% in RPRDC and outperform Proliferation Routing1. © 2015 The Authors.Item Enhancing reliability of cloud system through proactive identification of under performing components(Institute of Electrical and Electronics Engineers Inc., 2017) Bhattacharjee, S.; Annappa, B.Services involving cloud computing are advertised by the providers such that they are available all the time; but many of the recent past events have shown how a single or a bunch of component seizures can lead to a system failure affecting the business continuity of consumers. Though reliability of a cloud system depends heavily on the capability of the participating components as a whole, but there needs to be some methodology to monitor and make the whole system work efficiently upto the maximum capability of each respective individual components. In this paper, a mechanism for quantifying the reliability of cloud components is proposed so as to provide reliability as a service. Reliability of cloud is dependent on the nature and status of its individual components. Each component's credibility is evaluated based on the reliability score it obtains while executing its assigned jobs. From these scores faulty or error prone components are identified proactively and the non performing components are given a second chance to revive itself, failing which the defective components undergo further checks of the component's importance, history of past failures and other quality factors. If after these checks it is seen that the component is safe to remove and the system will not be affected in anyway by the removal, then the component is quarantined otherwise the defective component is identified and handled suitably. This method is aimed at giving a highly reliable and non-intermittent cloud service to the consumers not at the expense of getting rid of critical components. © 2016 IEEE.Item Energy efficient and reliable network design to improve lifetime of low power IoT networks(Institute of Electrical and Electronics Engineers Inc., 2017) Sarwesh, P.; Shekar, N.; Shet, V.; Chandrasekaran, K.Internet of Things is smart technology that is used in wide range of applications, IoT converges physical devices with cyber systems to facilitate global information sharing. In IoT network, devices are constrained by energy (limited by battery power). Thus, efficient energy utilization is the major challenge in low power IoT networks. In this paper, energy efficient and reliable network architecture is proposed to improve the lifetime of IoT networks. In proposed network architecture, routing technique and node placement technique are effectively integrated to address energy and reliability related issues. In node placement technique, density of sensor nodes are hierarchically varied to balance the energy consumption and reliability related parameters are included in routing mechanism. Hence, effective combination of these two techniques in single network architecture prolongs the lifetime of the network. In proposed work, sensor nodes and relay nodes, sensors do sensing and relay nodes handles path computation and data transmission. We included IEEE 802.15.4 PHY/MAC radio and IPv6 module in proposed work to adopt IoT Scenario. From our results, it is observed that proposed architecture prolongs the lifetime of low power IoT network. © 2017 IEEE.Item Failure rate and reliability of the KOMATSU hydraulic excavator in surface limestone mine(American Institute of Physics Inc. subs@aip.org, 2018) N. S., N.S.; Choudhary, R.P.; Murthy, C.S.N.The model with failure rate function of bathtub-shaped is helpful in reliability analysis of any system and particularly in reliability associated privative maintenance. The usual Weibull distribution is, however, not capable to model the complete lifecycle of the any with a bathtub-shaped failure rate function. In this paper, failure rate and reliability analysis of the KOMATSU hydraulic excavator/shovel in surface mine is presented and also to improve the reliability and decrease the failure rate of each subsystem of the shovel based on the preventive maintenance. The model of the bathtub-shaped for shovel can also be seen as a simplification of the Weibull distribution. © 2018 Author(s).Item Correlation of wind speed and wind turbine reliability in system adequacy assessment(Institute of Electrical and Electronics Engineers Inc., 2018) Nguyen, N.; Almasabi, S.; Mitra, J.; Shenoy, B.B.This paper proposes a new method to evaluate the reliability of a power system in the presence of wind generation, considering the negative correlation of wind turbine reliability and wind speed. Although wind power integration supports the power system by increasing generation, its intermittent nature is a matter of concern. As the integration of wind power systems steadily increases, the reliability of such integrated systems needs re-evaluation. Besides the relationship between wind speed and wind power output, the relationship between wind speed and wind turbine failure rate also has an impact on reliability of a wind farm and needs to be given due consideration. The method proposed in this paper to evaluate system reliability is implemented using the sequential Monte Carlo simulation. The implementation is tested on the IEEE RTS-79 system with relevant modifications. The effectiveness of the proposed method is proved by comparing system reliability indexes with and without considering the impacts of correlation between wind turbine reliability and wind speed. © 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 Reliability Analysis of LHD Machine - A Case Study(Springer Nature, 2020) BalaRaju, J.; Govinda Raj, M.; Murthy, C.S.N.In the present global scenario, survival of the industry is more critical unless it produces their intended targets. Accomplishment of expected rate of production levels are depends on the performance of equipment. Hence, it is very important to predict the maintenance schedules for replacement or repair actions of the defective parts. Keeping in view, every industry is constantly looking for enhancement equipment life. Reliability analysis is one of the well appropriated techniques used to estimate the life of the equipment. In this paper, performance of Load-Haul-Dumper (LHD) has been analyzed. Renewal process approach has been utilized for reliability investigation. Best fit distribution of data sets were made by the utilization of Kolmogorov-Smirnov (K-S) test. Parametric estimation of theoretical probability distributions was done by utilizing Maximum Likelihood Estimate (MLE) method. Reliability of each individual sub-system has been computed according to the best fit distribution. In addition to that, reliability based preventive maintenance (PM) time schedules were calculated for the expected 90% reliability level. The possible recommendations were suggested for improvement of reliability level. © 2020, Springer Nature Switzerland AG.