A novel method of estimating dynamic measurement errors

Hessling, Jan Peter

doi:10.1088/0957-0233/17/10/028

Cited by 45 publications

(64 citation statements)

References 19 publications

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“…These experiemnts confirm the hypothesis of a phase error in accelerometers, derived on theoretical grounds [8] and indicate that such errors should be controlled and minimized in various combinations of sensors. A simple method to minimize this error has been proposed.…”

Section: Discussionsupporting

confidence: 82%

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Phase effect in time-stamped accelerometer measurements – an experimental approach

Moschas

Stiros

2012

Int. J. Metrol. Qual. Eng.

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Abstract. The phase error in a high quality accelerometer was investigated on the basis of systematic experiments on a prototype platform permitting controlled vertical harmonic oscillations. The recordings of an accelerometer and of an ultra-high frequency GPS fixed on this platform were compared with those of a LVDT transducer, controlling the platform movement. All sensors were supported by independent GPS timing. The output of this study is that the recordings of accelerometers are characterized by a random phase error, which, however, decreases with the increase of the oscillation frequency, as dictated from the laws of mechanics. Such errors are important given the increasing use of combinations of accelerometers with various sensors for a wide range of applications. A simple method for the correction of such errors is proposed.

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Section: Discussionsupporting

confidence: 82%

“…Hessling [8], who proposed its stochastic estimation on the basis of cross-correlation, before the dynamic error in measurement systems is computed.…”

Section: Introductionmentioning

confidence: 99%

Phase effect in time-stamped accelerometer measurements – an experimental approach

Moschas

Stiros

2012

Int. J. Metrol. Qual. Eng.

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“…Some techniques are currently being developed. [7][8][9][10][11] In other words, both the uncertainty evaluation of the measured small force and the uncertainty evaluation of measurement time are extremely difficult.…”

Section: ͑1͒ No Methods Of Measuring Micro-newton Level Forcesmentioning

confidence: 99%

Method of generating and measuring static small force using down-slope component of gravity

Fujii

2007

Review of Scientific Instruments

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A method of generating and measuring static small forces at the micro-Newton level is proposed. In the method, the down-slope component of gravity acting on a mass on an inclined plane is used as a static force. To realize a linear motion of the mass with a small friction, an aerostatic linear bearing is used. The forces acting on the mass, such as the down-slope component of gravity and the dynamic frictional force, are determined by the levitation mass method. In an experiment, a static small force of approximately 183 N is generated and measured with a standard uncertainty of approximately 2 N.

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“…Błąd dynamiczny, nazywany "niepewnością odpowiedzi" może być traktowany jako część składowa ogólnej niepewności pomiarów [15]. Literatura przedmiotu rozróżnia pomiędzy pełną a częściową charakterystyką dynamiczną [16].…”

Section: Określanie Właściwości Dynamicznych Czujników Pneumatycznychunclassified

Variations of the time constant within the measuring range of an air gauge

Rucki¹

2015

Mechanik

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ZMIENNOŚĆ STAŁEJ CZASOWEJ W CZASIE POMIARU CZUJNIKIEM PNEUMATYCZNYMPomiar bezstykowy czujnikami pneumatycznymi wciąż znajduje zastosowanie w przemyśle, głównie w ukła-dach kontroli czynnej. W tych warunkach bardzo istotne są ich właściwości dynamiczne, zależne od geometrii elementów przepływowych oraz od aktualnego ciśnienia w komorze pomiarowej. Badania wykazały, że przy mniejszych ciśnieniach odpowiadających szerszym szczelinom pomiarowym, stała czasowa wzrasta, w niektó-rych przypadkach nawet o 100%. Nieuwzględnienie tego faktu może doprowadzić do zwiększenia błędów pomiaru właśnie w końcowej fazie obróbki. VARIATIONS OF THE TIME CONSTANT WITHIN THE MEASURING RANGE OF AN AIR GAUGENon-contact measurement with the air gauges still takes place in industry, mainly in the in-process inspection. In such work conditions, their dynamic characteristics shaped by geometry of the air gauge and dependent on the actual measuring pressure become of great importance. The investigations proved that when the pressure in the chamber is lower, which corresponds with larger measured slots, the time constant increases, sometimes even up to 100%. If this phenomenon is neglected, the final stage of the machining could bear much larger error than expected.

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A novel method of estimating dynamic measurement errors

Cited by 45 publications

References 19 publications

Phase effect in time-stamped accelerometer measurements – an experimental approach

Phase effect in time-stamped accelerometer measurements – an experimental approach

Method of generating and measuring static small force using down-slope component of gravity

Variations of the time constant within the measuring range of an air gauge

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