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Relevant bibliographies by topics / Impulse excitation technique

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Academic literature on the topic 'Impulse excitation technique'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 March 2023

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Journal articles on the topic "Impulse excitation technique"

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Singhose, William, Erika Ooten Biediger, Ye-Hwa Chen, and Bart Mills. "Reference Command Shaping Using Specified-Negative-Amplitude Input Shapers for Vibration Reduction." Journal of Dynamic Systems, Measurement, and Control 126, no. 1 (2004): 210–14. http://dx.doi.org/10.1115/1.1650385.

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Residual vibrations can be greatly reduced by using specially-shaped reference command signals. Input shaping is one such technique that reduces vibration by convolving a sequence of impulses with any desired reference command. Several types of useful impulse sequences have been developed. Most of these have contained only positively valued impulses. However, rise time can be improved by using some negative impulses in the sequence. Unfortunately, the use of negative impulses can excite unmodeled high modes. A new type of impulse sequence containing negative impulses is proposed. These sequenc

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Qu, Chun-Xu, Ting-Hua Yi, and Hong-Nan Li. "Modal identification for superstructure using virtual impulse response." Advances in Structural Engineering 22, no. 16 (2019): 3503–11. http://dx.doi.org/10.1177/1369433219862951.

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In civil engineering, structural modes are identified with the assumption of stationary white noise, which cannot be satisfied in practical engineering. This article proposes a new method, which contains the virtual impulse response and eigensystem realization algorithm. The formulation of virtual impulse response is derived from the inverse Fourier transform of the ratio of the cross-power to auto-power spectral density functions of the measurement responses, which is based on the concept of frequency response function. During the formulation derivation, a single point excitation is only cons

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Wei, Chen Guang, Yi Wang Bao, Zheng Quan Liu, and Dong Wang. "Influence of Specimen Size on the Impulse Excitation Technique." Key Engineering Materials 633 (November 2014): 459–62. http://dx.doi.org/10.4028/www.scientific.net/kem.633.459.

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The Impulse Excitation technique is a nondestructive and very convenient testing method. It could be applied at different circumstances such as high temperatures, low temperatures and controlled humidity. The Impulse Excitation technique is based on the analysis of the vibration of a test sample after it was impulse excited. The elastic properties of a test specimen are related to its mechanical resonance frequency. In this paper, the regular of resonance frequency changed with specimen’s size was discussed. Elastic modulus of glass with different length, width and thickness were measured, and

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Duan, R. G., G. Roebben, O. Van der Biest, K. M. Liang, and S. R. Gu. "Microstructure research of glasses by impulse excitation technique (IET)." Journal of Non-Crystalline Solids 281, no. 1-3 (2001): 213–20. http://dx.doi.org/10.1016/s0022-3093(00)00397-5.

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Pereira, Inês. "Overview on Determination of Elastic and Damping Properties of Different Materials using Impulse Excitation Technique." U.Porto Journal of Engineering 3, no. 3 (2018): 35–41. http://dx.doi.org/10.24840/2183-6493_003.003_0004.

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Knowledge of elastic and damping properties of materials is very relevant for the analysis and design of components, as they are relevant parameters in the performance of structural materials. The impulse excitation technique is a renowned dynamic technique for measuring dynamic elastic properties as Young´s modulus, shear modulus and Poisson’s ratio, as well as damping properties. This paper provides a review on the applicability of the impulse excitation technique in the analysis of elastic and damping properties of different types of materials.

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Heritage, Kevin, Clayton Frisby, and Alan Wolfenden. "Impulse excitation technique for dynamic flexural measurements at moderate temperature." Review of Scientific Instruments 59, no. 6 (1988): 973–74. http://dx.doi.org/10.1063/1.1139761.

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Roebben, G., B. Basu, J. Vleugels, J. Van Humbeeck, and O. Van der Biest. "The innovative impulse excitation technique for high-temperature mechanical spectroscopy." Journal of Alloys and Compounds 310, no. 1-2 (2000): 284–87. http://dx.doi.org/10.1016/s0925-8388(00)00966-x.

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Pei, Qiang, and Long Li. "Structural Modal Parameter Identification Based on Natural Excitation Technique." Advanced Materials Research 859 (December 2013): 167–70. http://dx.doi.org/10.4028/www.scientific.net/amr.859.167.

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Natural excitation technique has found an increasingly wide utilization in civil engineering field. Modal parameter identification in time domain method can identify the structural parameters in the use of impulse response data as input data. The theory of NExT method is presented. By constructing a numerical simulation example under white-noise excitation, and calculating the data by NExT method, the modal parameters can be identified according to complex exponential method and time series-method in time domain. The results and analysis indicate the validity of the method and provide a refere

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J. Jayakanth, J., and M. Chandrasekaran. "Virtual Instrumentation Programming and Psoc Embedded Design for Bearing Fault Detection: Uses Impulse Excitation Technique." International Journal of Engineering & Technology 7, no. 3.27 (2018): 170. http://dx.doi.org/10.14419/ijet.v7i3.27.17753.

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This paper describes, a novel innovative design for generating vibration signals in a bearing, which is in static mode not in dynamic mode like other usual measurements reported in literatures, for various types of bearing faults analysis supports users with a technique based on monitoring vibration signals. This paper reports the computed power spectrum from vibration signal clearly identifies the fault signature with its raise in amplitude. Hence, in an impulse excitation technique vibration analysis with computed power spectrum provides an efficient monitoring of fault in axle bearings in a

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Swarnakar, Akhilesh Kumar, S. Giménez, Sedigheh Salehi, Jef Vleugels, and Omer Van der Biest. "Recent Advances in Material Characterization Using the Impulse Excitation Technique (IET)." Key Engineering Materials 333 (March 2007): 235–38. http://dx.doi.org/10.4028/www.scientific.net/kem.333.235.

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The Impulse Excitation Technique (IET) is a non-destructive technique for evaluation of the elastic and damping properties of materials. This technique is based on the mechanical excitation of a solid body by means of a light impact. For isotropic, homogeneous materials of simple geometry (prismatic or cylindrical bars), the resonant frequency of the free vibration provides information about the elastic properties of the materials. Moreover, the amplitude decay of the free vibration is related to the damping or internal friction of the material. At present, IET is a well-established non-destru

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Dissertations / Theses on the topic "Impulse excitation technique"

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Valášek, Daniel. "Stanovení mechanických charakteristik povlaků impulsní excitační metodou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442844.

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This diploma thesis deals with the determination of the Young’s modulus of coatings using the impulse excitation technique (IET). The theoretical part of the thesis describes Cold and Thermal Spray technology, theoretical foundations of the impulse excitation technique and models of composite materials. The experimental part of the thesis deals with the determination of the tensile modulus of copper coating created by Cold Spray technology. The impulse excitation technique has been used to measure fifteen samples with coating thickness ranging approximately from 0,4 to 2 mm. Results from this

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Fodor, Ján. "Určování mechanických charakteristik materiálů vícevrstvých struktur s využitím metody zvukové rezonance a modální MKP analýzy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318138.

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Thesis deals with determination of layerwise mechanical properties of composite ceramics by indirect method, namely Youngs modulus. Based on literature review, it was found that a method to determine elastic properties of one or more components of multi layered composites based on experimental modal analysis and finite element modal analysis, or analytical approach exists. Method based on FE modal analysis was applied to ceramic laminate, where it was attempt to determine youngs modulus of one component. Beyond that, it was attempt to determine Youngs moduli of both components using first two

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Ching-lung, Lee, and 李青隆. "Study on Measurement of Material Properties for Platy Specimen with Impulse Excitation Technique." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/07755183458204035195.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>104<br>This study used the Impulse Excitation Technique (IET) and numerical analysis to explore the dynamic moduli of platy specimens. When the specimens was hit by the impactor of steel ball, the resulting vibration produced the time-domain sound wave and the resonant frequencies were obtained by the Fast Fourier Transform (FFT) to calculate the experimental values of dynamic modulus Together with the results from numerical simulation, the appropriate dimension of platy specimen for testing and the feasibility of application to the heterogeneous material were addres

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Book chapters on the topic "Impulse excitation technique"

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Swarnakar, Akhilesh Kumar, S. Giménez, Sedigheh Salehi, Jozef Vleugels, and Omer van der Biest. "Recent Advances in Material Characterization Using the Impulse Excitation Technique (IET)." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-424-3.235.

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Venkateswara Reddy, K., R. Bheekya Naik, Sandeep Yadav, G. Madhusudhan Reddy, and R. Arockia Kumar. "Measurement of Elastic Modulus and Damping Properties of Friction Stir Processed Pure Metals Using Impulse Excitation Technique." In Advances in Applied Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1201-8_58.

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Swarnakar, Akhilesh Kumar, Songlin Ranb, and Jozef Vleugels. "Analysis of Dynamic Young's Modulus and Damping Behavior of ZrB2-SiC Composites by the Impulse Excitation Technique." In Developments in Strategic Ceramic Materials II. John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119321811.ch22.

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Popov, Ivan I., Yury A. Rossikhin, and Marina V. Shitikova. "Experimental Identification of the Fractional Parameter for a Viscoelastic Model of Concrete at Different Ages Based on the Impulse Excitation Technique." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5693-7_25.

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Andersen, Kristian Gjerrestad, Gbanaibolou Jombo, Sikiru Oluwarotimi Ismail, Yong Kang Chen, Hom Nath Dhakal, and Yu Zhang. "Damage Characterisation in Composite Laminates Using Vibro-Acoustic Technique." In Springer Proceedings in Energy. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_34.

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AbstractThe need to characterise in-service damage in composite structures is increasingly becoming important as composites find higher utilisation in wind turbines, aerospace, automotive, marine, among others. This paper investigates the feasibility of simplifying the conventional acousto-ultrasonic technique set-up for quick and economic one-sided in-service inspection of composite structures. Acousto-ultrasonic technique refers to the approach of using ultrasonic transducer for local excitation while sensing the material response with an acoustic emission sensor. However, this involves transducers with several auxiliaries. The approach proposed herewith, referred to as vibro-acoustic testing, involves a low level of vibration impact excitation and acoustic emission sensing for damage characterisation. To test the robustness of this approach, first, a quasi-static test was carried out to impute low-velocity impact damage on three groups of test samples with different ply stacking sequences. Next, the vibro-acoustic testing was performed on all test samples with the acoustic emission response for the samples acquired. Using the acoustic emission test sample response for all groups, the stress wave factor was determined using the peak voltage stress wave factor method. The stress wave factor results showed an inverse correlation between the level of impact damage and stress wave factor across all the test sample groups. This corresponds with what has been reported in literature for acousto-ultrasonic technique; thus demonstrating the robustness of the proposed vibro-acoustic set-up. Structural health monitoring, impact damage, acousto-ultrasonic testing, non-destructive testing.

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Conference papers on the topic "Impulse excitation technique"

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Xu, Y. F., and W. D. Zhu. "Efficient and Accurate Calculation of Discrete Frequency Response Functions and Impulse Response Functions." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47779.

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Modal properties of a structure can be identified by experimental modal analysis (EMA). Discrete frequency response functions (FRFs) and impulse response functions (IRFs) between responses and excitation are bases for EMA. In calculation of a discrete FRF, discrete Fourier transform (DFT) is applied to both response and excitation data series, and a transformed data series in DFT is virtually extended to have an infinite length and be periodic with a period equal to the length of the series; the resulting periodicity can be physically incorrect in some cases, which depends on an excitation tec

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Zanardini, Matheus Henrique, and Aline Treml. "Characterization of Thermal Effects in the Modulus of Elasticity of Carbon-Epoxy Laminate Composite, Using the Impulse Excitation Technique." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0573.

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Samarkhanov, K. K., E. G. Batyrbekov, M. U. Khasenov та ін. "Methodology for conducting in-pile experiments to study spectral-temporal characteristic of gas media upon excitation by the 6Li(n,α)3H nuclear reaction". У 8th International Congress on Energy Fluxes and Radiation Effects. Crossref, 2022. http://dx.doi.org/10.56761/efre2022.s4-p-046101.

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Almost all experimental studies of the characteristics of nuclear-excited plasma formed by the products of nuclear reactions were performed on impulse nuclear reactors, which differ in the composition and design of the core, the duration, flux and fluence of the neutron impulse, the volume and configuration of the area for irradiation, and the impulse repetition frequency. This work presents a description of the experimental (methodical and equipment) base of the National Nuclear Center of the Republic of Kazakhstan (Kurchatov) for conducting in-pile experiments at the impulse nuclear reactor

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Villalva, Sergio, Fabio Gennaro, Fernando Windlin, Guilherme Alegre, João Mazziero, and Marcelo Cavaglieri. "Study of Correlation between Vibration Tests and Finite Element Simulations by Means of Impulse Excitation Technique Applied to Components of an Automatized Transmission System." In 22nd SAE Brasil International Congress and Display. SAE International, 2013. http://dx.doi.org/10.4271/2013-36-0218.

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Turunen, E., T. Varis, K. Ruusuvuori, et al. "Functionally Graded HVOF Sprayed NiCr-Al2O3 Coatings Coatings for Demanding Applications." In ITSC2003, edited by Basil R. Marple and Christian Moreau. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.itsc2003p1531.

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Abstract Functionally graded (FG) coatings were manufactured by High Velocity Oxy-Fuel (HVOF) thermal spraying and tested aiming for the high temperature applications. Single layers were manufactured and their elastic modulus measured by using Impulse Excitation Technique (IET). Obtained data was used for modeling of optimal gradient structure. Dual feeding hose for HVOF gun was developed. Calibration procedure for the concurrent use of two powder feeders was performed. NiCr-Al2O3 coatings with coating thickness of 600 µm and 1000 µm were manufactured and tested. Promising results were obtaine

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Tillmann, W., W. Luo, and U. Selvadurai. "The Influence of Residual Stress on Wear Resistance of Thermal Spray Coatings." In ITSC2015, edited by A. Agarwal, G. Bolelli, A. Concustell, et al. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.itsc2015p0718.

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Abstract The wear resistance of thermal spray coatings mainly depends on coating properties such as the microstructure, hardness, and porosity, as well as on the residual stress in the coating. The residual stress is induced by a variety of influences e.g. temperature gradients, difference of the thermal expansion coefficient of the coating / substrate materials, and the geometry of the components. To investigate the residual stress, the Impulse Excitation Technique was employed to measure the Young’s and shear moduli. The residual stress was determined by using the hole-drilling method and X-

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Tillmann, W., U. Selvadurai, and W. Luo. "Measurement of the Young’s Modulus of Thermal Spray Coatings by Means of Several Methods." In ITSC 2012, edited by R. S. Lima, A. Agarwal, M. M. Hyland, et al. ASM International, 2012. http://dx.doi.org/10.31399/asm.cp.itsc2012p0580.

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Abstract Thermally sprayed coatings are usually defined by their hardness, porosity, roughness and wear resistance. Even though the Young’s modulus is an essential property, which describes the mechanical behavior of the coated components during their use, only few efforts were made to determine this property. The most common measurement methods of the Young’s modulus of thermally sprayed coatings are tensile tests, bending tests, and nanoindentations. During the tensile and bending tests a sliding of the splats can occur due to the laminar structure of the thermally sprayed coatings, influenc

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Mezher, Haitham, David Chalet, Pascal Chessé, Jérôme Migaud, and Vincent Raimbault. "Transfer Matrix Computation for Wave Action Simulation in an Internal Combustion Engine." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82579.

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A new technique for simulating engine pressure waves consisting of linking pressure response and mass flow rate excitation in the frequency domain has been presented. This is achieved on the so-called “dynamic flow bench”. With this new approach, precise, fast and robust results can be obtained while taking into account all the phenomena inherent to compressible unsteady flows. The method exhibited promising results when it was incorporated in a GT-Power/Simulink coupled simulation of a naturally aspirated engine. However, today’s downsized turbocharged engines come with more stringent simulat

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Velandy, Jeyabalan, and Satish Sundaresan. "Acoustic emission techniques for transformers during lightning impulse voltage excitation." In 2018 International Conference on Power, Instrumentation, Control and Computing (PICC). IEEE, 2018. http://dx.doi.org/10.1109/picc.2018.8384815.

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Doroshenko, Vladimir A. "Analytical and numerical method for solving model problems of slotted cone antenna impulse excitation." In 2007 6th International Conference on Antenna Theory and Techniques. IEEE, 2007. http://dx.doi.org/10.1109/icatt.2007.4425160.

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