Wyniki wyszukiwania - BazTech

1

Design of Low–power 4-bit Flash ADC Using Multiplexer Based Encoder in 90nm CMOS Process

Shylu Sam D. S., Sam Paul P., Jeba Jingle Diana, Mano Paul P., Samuel Judith, Reshma J., Sudeepa P. Sarah, Evangeline G.

International Journal of Electronics and Telecommunications

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2022

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Vol. 68. No. 3

565--570

EN

This work describes a 4-bit Flash ADC with low power consumption. The performance metrics of a Flash ADC depend on the kind of comparator and encoder used. Hence openloop comparator and mux-based encoder are used to obtain improved performance. Simulation results show that the simulated design consumes 0.265mW of power in 90nm CMOS technology using cadence-virtuoso software. The circuit operates with an operating frequency of 100MHz and a supply voltage of 1V.

2

IoT based prognostics using MEMS sensor with single board computers for rotary machines

Vasanth. X. Ajay, Sam Paul P., Shylu D. S., Mano Paul P.

Przegląd Elektrotechniczny

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2021

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R. 97, nr 11

170--174

EN

In the recent past years prognostics has gained importance in the industry sector as they have reduced maintenance cost and time to a great deal. The term IoT has opened a wide variety of applications with it and there have been very few feeble attempts to integrate it with prognostics. Combining low-cost energy efficient MEMS sensor and IoT in prognostics has been a dream far-fetched by industries. This paper will be attempt where the MEMS sensor will be fused along with IoT in prognostics and the same was used in a rotary machine.

PL

W ostatnich latach prognozy zyskały na znaczeniu w sektorze przemysłowym, ponieważ znacznie zmniejszyły koszty i czas konserwacji. IoT otworzył wiele różnych zastosowań i było bardzo niewiele prób zintegrowania go z prognozami. Połączenie niskokosztowego, energooszczędnego czujnika MEMS i Internetu Rzeczy w prognozach było marzeniem naciąganym przez przemysł. Ten artykuł będzie próbą, w której czujnik MEMS zostanie połączony z Internetem Rzeczy w prognostyce i to samo zostanie użyte w maszynie rotacyjnej.

3

Effect of magnetorheological fluid on tool wear during hard turning with minimal fluid application

Sam Paul P., Varadarajan A. S., Mohanasundaram S.

Archives of Civil and Mechanical Engineering

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2015

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Vol. 15, no. 1

124--132

EN

Tool wear is a very complex phenomenon which can lead to machine down time, product rejects and can also cause problems to personnel. The present investigation aims at developing a magnetorheological fluid setup that can be attached to the tool holder for reducing tool wear during hard turning with minimal fluid application. The magnetorheological fluid acts as a viscoelastic spring with non-linear vibration characteristics that are controlled by parameters like the viscosity index of the fluid medium, shape of the plunger, current through the coil and size of the ferromagnetic particles. Cutting experiments were conducted to arrive at a set of magnetorheological fluid parameters that can offer better damping characteristics to minimize tool wear and promoting better cutting performance during turning of AISI 4340 steel of 46 HRC with minimal fluid application using hard metal insert with sculptured rake face. From the results, it was observed that the presence of magnetorheological fluid setup during hard turning with minimal fluid application attached to the tool holder reduces tool wear and brought forth better cutting performance. Commercialization of this idea is sure to benefit the metal cutting industry.

4

Effect of magnetic field on damping ability of magnetorheological damper during hard turning

Sam Paul P., Varadarajan A. S., Ajay Vasanth X., Lawrance G.

Archives of Civil and Mechanical Engineering

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2014

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Vol. 14, no. 3

433--443

EN

Tool vibration is a frequent problem in the manufacturing industry where metal cutting operation takes place. It affects the surface finish of the work piece, tool life, and produce irritating noise. In order to restrain tool vibration in metal cutting, it is necessary to develop and analyze suitable methods which increases stability and also improves the cutting performance. Magnetorheological damper has received great attention due to their ability to reversibly change from a free flowing, linear, viscous liquid to a semi-solid when exposed to magnetic field in just few milliseconds and also found to be effective on suppressing tool vibration. The present investigation aims at studying the effect of magnetic field on the damping abilities of the magnetorheological (MR) damper during hard turning operation. MR damper was characterized and the effect of magnetic field on damping ability of MR damper and cutting performances like tool vibration, cutting force, cutting temperature, tool wear and surface roughness were analyzed. From the result, it was observed that direction of magnetic field parameter on magnetorheological damper reduces tool vibration effectively and brought forth better cutting performance.