Recent advances in vibration and shock measurements and calibrations using laser interferometry

Martens, Hans-Juergen von; Link, Alfred; Schlaak, Hans-Joachim; Taeubner, Angelika; Wabinski, Wolfgang; Goebel, Uwe

doi:10.1117/12.579524

Cited by 19 publications

(15 citation statements)

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“…However, acceleration is a fundamental quantity for dynamic measurements and the campaign should serve as a model campaign for the other three quantities, exploiting the fact that a traceable primary calibration of accelerometers has already been realized in PTB [7,8] were repeatedly (19 and 20 times, respectively) mounted into the measurement setup and values of the FRF were measured for a range of frequencies (10 Hz -20 kHz) using a sinusoidal excitation of the system. The input acceleration was measured with a laser interferometer pointing its rays at two points on the top of the BB accelerometer and at two points next to the bottom of the SE accelerometer.…”

Section: A Practical Casementioning

confidence: 99%

Linear Mixed Models: Gum and Beyond

Arendacká

Täubner

Eichstädt

et al. 2014

Measurement Science Review

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In Annex H.5, the Guide to the Evaluation of Uncertainty in Measurement (GUM) [1] recognizes the necessity to analyze certain types of experiments by applying random effects ANOVA models. These belong to the more general family of linear mixed models that we focus on in the current paper. Extending the short introduction provided by the GUM, our aim is to show that the more general, linear mixed models cover a wider range of situations occurring in practice and can be beneficial when employed in data analysis of long-term repeated experiments. Namely, we point out their potential as an aid in establishing an uncertainty budget and as means for gaining more insight into the measurement process. We also comment on computational issues and to make the explanations less abstract, we illustrate all the concepts with the help of a measurement campaign conducted in order to challenge the uncertainty budget in calibration of accelerometers.

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Section: A Practical Casementioning

confidence: 99%

Linear Mixed Models: Gum and Beyond

Arendacká

Täubner

Eichstädt

et al. 2014

Measurement Science Review

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“…The lower limit of the frequency of the low frequency acceleration standard of Physikalisch-Technische Bundesanstalt (PTB) is 0.1 Hz (shake table 0.01 Hz), the maximum acceleration is 2 m/s 2 , and the maximum amplitude is 1 m [1].The high-frequency vibration standard established by the National Institute of Standards and Technology (NIST) in 1969 has reached an accuracy of 1 % in the frequency range of (10-500) Hz [2].The accelerometer calibration system frequency of the National Metrology Institute of Japan (NMIJ) was extended to 0.1 Hz [3]. This standard equipment is based on absolute methods and can only be used in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Design of vibration standard device based on random comparison method

Gao¹,

Lu²,

Chen³

et al. 2019

Vib. proced.

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In order to meet the needs for aircraft vibration transducer and measurement equipment to be calibrated at the job site, it is necessary to design a compact, dynamic and functional vibration standard device. This paper introduces a vibration standard device based on random comparison method. The structure and working principle of software and hardware are described in detail. Unlike the calibration requirements under laboratory conditions, on-site calibration requires that the calibration process be more consistent with the actual operating conditions. A random vibration comparison calibration method using random signals as excitation sources is designed. The vibration standard device can be maneuvered from the laboratory environment to the aircraft maintenance site. It has been proved measurement uncertainty of the system is 1.0 % (= 2) by the method of control accuracy.

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“…Such calibrations are often performed at National Metrology Institutes (NMIs) [9], where the test unit is mounted onto an interferometrically-interrogated reference shaker system [10][11][12]. Such calibrations reach relative uncertainties of the order of 10 −2 − 10 −2.5 .…”

Section: Introductionmentioning

confidence: 99%

Optomechanical reference accelerometer

et al. 2015

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We present an optomechanical accelerometer with high dynamic range, high bandwidth and readout noise levels below 8 µg/ √ Hz . The straightforward assembly and low cost of our device make it a prime candidate for on-site reference calibrations and autonomous navigation. We present experimental data taken with a vacuum sealed, portable prototype and deduce the achieved bias stability and scale factor accuracy. Additionally, we present a comprehensive model of the device physics that we use to analyze the fundamental noise sources and accuracy limitations of such devices.

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Recent advances in vibration and shock measurements and calibrations using laser interferometry

Cited by 19 publications

References 0 publications

Linear Mixed Models: Gum and Beyond

Linear Mixed Models: Gum and Beyond

Design of vibration standard device based on random comparison method

Optomechanical reference accelerometer

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