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Shaikh Faruque Ali

Bio: Shaikh Faruque Ali is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Energy harvesting & Vibration. The author has an hindex of 17, co-authored 78 publications receiving 935 citations. Previous affiliations of Shaikh Faruque Ali include Nancy-Université & Swansea University.

Papers published on a yearly basis

Papers
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Proceedings ArticleDOI
01 Aug 2013
TL;DR: In this paper a simplified two-degree of freedom lumped mass model is studied for the analysis of the proposed hybrid harvesting system for harmonic vibration input and attempts are made to optimize the parameters of the model to get maximum net power generated by the system.
Abstract: This paper proposes a novel energy harvesting system model based on combined electromechanical and electromagnetic transduction technique. A cantilever substrate (beam) with piezoelectric (PZT) patch and a mass at the tip is considered for electromechanical transductions. A magnet is hanged through a spring at the tip of the composite beam over a printed circuit board. When the cantilever system is subjected to base excitations, the motion of the magnet relative to a conducting circuit placed near it generates electric energy in the circuit, while the strains induced in the PZT patch will also generate electric energy. In this paper a simplified two-degree of freedom lumped mass model is studied for the analysis of the proposed hybrid harvesting system for harmonic vibration input. Attempts are made to optimize the parameters of the model to get maximum net power generated by the system.

3 citations

Proceedings ArticleDOI
TL;DR: In this paper, an equivalent linear model for piezomagnetoelastic energy harvesters under broadband random ambient excitations was developed and a cosed-form approximate expression for the ensemble average of the harvested power was derived.
Abstract: This paper develops an equivalent linear model for piezomagnetoelastic energy harvesters under broadbandrandom ambient excitations. Piezomagn etoelastic harvesters are used for po wering low power electronic sensorsystems. Nonlinear behaviour arising due to the vibrati on in a magnetic “eld makes piezomagnetoelastic energyharvesters die rent from the more classical piezoelastic energy harvesters. First numerical simulation of thenonlinear model is presented and then an equivalent linea rization based analytical approach is developed for theanalysis of harvested power. A cosed-form approximate expression for the ensemble average of the harvestedpower is derived. The equivalent model is seen to capture the details of the nonlinear model and also providesmore details to the behaviour of the harvester to random excitation. Our results show that it is possible tooptimally design the system such that the mean harvested power is maximized for a given strength of the inputbroadband random ambient excitation.Keywords: Nonlinear energy harvesting, Magnetopiezoelastic systems, statistical linearization

3 citations

Journal ArticleDOI
TL;DR: In this paper, ground resonance is mitigated by using passive lead-lag dampers that provide sufficence in reducing aero-mechanical instability in helicopters that use soft in-plane rotors.
Abstract: Ground resonance is an aero-mechanical instability in helicopters that use soft in-plane rotors. Traditionally, ground resonance is mitigated by using passive lead–lag dampers that provide sufficie...

3 citations

Proceedings ArticleDOI
21 Mar 2019
TL;DR: In this article, two numerical approaches for the shape prediction of a composite wing panel under the combined actuation of a Shape memory alloy (SMA) wire and a Macro fiber composite (MFC) bimorph has been developed.
Abstract: In this article two numerical approaches for the shape prediction of a composite wing panel under the combined actuation of a Shape memory alloy (SMA) wire and a Macro fiber composite (MFC) bimorph has been developed. The first approach is a Euler-Bernouilli beam theory based linear finite element iterative scheme and the second approach is a Timoshenko beam theory based nonlinear finite element iterative scheme that takes into account the von Karman strains. The force due to the SMA wire is modeled as a follower force. It is shown that both the techniques developed are capable taking into account this non conservative follower force, while accounting for any additional arbitrary loading. The numerical schemes developed in this paper are validated using the existing techniques while elucidating the lacuna in the existing methods.

2 citations

Book ChapterDOI
01 Jan 2021
TL;DR: In this paper, the effect of mistuning in a set of harvesters that are designed to be perfectly tuned is investigated and it is observed that in the mistuned cases bandwidth is larger when compared to the tuned cases.
Abstract: Increase in usage of small electronics and environment threat that batteries provide have accelerated the research in energy harvesting in the last decade. The main challenges in energy harvesting are to increase the operating frequency bandwidth of harvesters and to increase the amount of power harvested. Multiple tuned harvesters have gained a lot of attention in alleviating these challenges. Attaining perfect tuning is a challenge and mistuning is inherent in systems. This study looks into the effect of mistuning in a set of harvesters that are designed to be perfectly tuned. The harvester set is considered to be a set of nonlinear oscillators that represent pendulum-based energy harvester. Four different arrangements among the oscillators are considered. These are (a) series of independent harvesters, (b) series of independent but mistuned harvesters, (c) interacting harvesters, and (d) interacting but mistuned harvesters. In all these cases, base excitation is imparted to the system and physics of the system is studied. It is observed that in the mistuned cases bandwidth is larger when compared to the tuned cases.

2 citations


Cited by
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Journal ArticleDOI
18 Apr 2018-Joule
TL;DR: A comprehensive review of piezoelectric energy-harvesting techniques developed in the last decade is presented, identifying four promising applications: shoes, pacemakers, tire pressure monitoring systems, and bridge and building monitoring.

720 citations

Journal ArticleDOI
TL;DR: In this article, the authors highlight the role of nonlinearities in the transduction of energy harvesters under different types of excitations and investigate the conditions, in terms of excitation nature and potential shape, under which such non-linearities can be beneficial for energy harvesting.
Abstract: The last two decades have witnessed several advances in microfabrication technologies and electronics, leading to the development of small, low-power devices for wireless sensing, data transmission, actuation, and medical implants. Unfortunately, the actual implementation of such devices in their respective environment has been hindered by the lack of scalable energy sources that are necessary to power and maintain them. Batteries, which remain the most commonly used power sources, have not kept pace with the demands of these devices, especially in terms of energy density. In light of this challenge, the concept of vibratory energy harvesting has flourished in recent years as a possible alternative to provide a continuous power supply. While linear vibratory energy harvesters have received the majority of the literature’s attention, a significant body of the current research activity is focused on the concept of purposeful inclusion of nonlinearities for broadband transduction. When compared to their linear resonant counterparts, nonlinear energy harvesters have a wider steady-state frequency bandwidth, leading to a common belief that they can be utilized to improve performance in ambient environments. Through a review of the open literature, this paper highlights the role of nonlinearities in the transduction of energy harvesters under different types of excitations and investigates the conditions, in terms of excitation nature and potential shape, under which such nonlinearities can be beneficial for energy harvesting. [DOI: 10.1115/1.4026278]

682 citations

01 Jan 2016
TL;DR: The stochastic processes and filtering theory is universally compatible with any devices to read and will help you to get the most less latency time to download any of the authors' books like this one.
Abstract: Thank you for reading stochastic processes and filtering theory. Maybe you have knowledge that, people have look numerous times for their favorite novels like this stochastic processes and filtering theory, but end up in harmful downloads. Rather than reading a good book with a cup of tea in the afternoon, instead they are facing with some infectious bugs inside their computer. stochastic processes and filtering theory is available in our digital library an online access to it is set as public so you can download it instantly. Our digital library saves in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the stochastic processes and filtering theory is universally compatible with any devices to read.

646 citations