Determination of the averaging time for precision calibration of a build-up system in a deadweight force machine

Kang, Dae-Im; Lim, Byoung-Duk

doi:10.1016/s0263-2241(97)00004-3

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…The theoretical value of uncertainty of DWM measurement is 1 × 10 -5 , but the actual value is only 5 × 10 -5 [1]. There are many factors affecting the measurement uncertainty of DWM, usually including the local acceleration of gravity, weight material density, uncertainty of weight mass, the density of air quality, the swing of the central boom and beam tilt (the uncertainty of DWM and the force transducer structures) [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 95%

Analysis of mechanical properties for the key force transfer components of 2 MN deadweight force standard machine

Wei¹,

Guo²,

Lai

et al. 2020

ACTA IMEKO

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Section: Introductionmentioning

confidence: 95%

Analysis of mechanical properties for the key force transfer components of 2 MN deadweight force standard machine

Wei¹,

Guo²,

Lai

et al. 2020

ACTA IMEKO

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“…In our previous work [6], we proposed a time-averaging method for reducing the ac component and determined optimal averaging times by considering envelopes of force signals. The averaging time can be given by…”

Section: Techniques For Reducing the Ac Componentmentioning

confidence: 99%

“…Thus the use of a buildup system is an important means for investigating the motion of a dead-weight force machine, because the oscillating components reflect the dynamic behaviour of the machine. In previous papers [4][5][6], we investigated the motion of a dead-weight force machine of 498 kN at the Korea Research Institute of Standards and Science (KRISS). A model based on analysis of oscillating signals of force transducers in a build-up system, for predicting the dead-weight oscillation quantitatively, was proposed [4,5].…”

Section: Introductionmentioning

confidence: 99%

Oscillating signal components of a dead-weight force-standard machine and reduction techniques

Park¹,

Kang²

1999

Meas. Sci. Technol.

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This paper describes the dynamic behaviour of a dead-weight force-standard machine at the Korea Research Institute of Standards and Science (KRISS). When a build-up system is set into a dead-weight machine, the signals from the force transducers in the build-up system consist of a dc component and oscillating signal components. The dominant oscillating components are due to pendulum motions of the dead weights and bounce-mode oscillation. The oscillation frequencies are about 0.19-0.23 Hz for the pendulum motions and 0.67-1.42 Hz for the bounce-mode oscillation. The frequencies decrease as the weights loaded are increased. The time-averaging technique is the simplest method for reducing the ac components. However, it has some limitations in that the averaging time must be re-adjusted according to the loading conditions. Other methods of reducing the ac components are therefore required. We introduced an infinite-impulse-response (IIR) low-pass filter, which reduced the oscillating components dramatically for all loading conditions. The results obtained by using IIR filtering were compared with those of time averaging and shown to be better.

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“…The authors have investigated deadweight motion by using a build-up system [1][2][3][4]. The build-up system consists of three identical force transducers in parallel and provides an efficient method for measuring large forces.…”

Section: Introductionmentioning

confidence: 99%

Reduction of deadweight pendulum motion and its conformation by using a build-up system

et al. 2009

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Deadweight force machines cause oscillating components strongly related to the pendulum motion of the deadweight in the measured force signals. An estimating method of the pendulum motion using a build-up system has been proposed in previous papers. In this paper, the estimation algorithm was confirmed by comparison with the directly measured trajectory through the analysis of a 500 kN deadweight force standard machine in Korea Research Institute of Standards and Science. After the dynamic analysis of the force machine, it was modified to decrease the pendulum motion effects by accurately controlling its loading speed. As a result of the modification, the oscillating level due to the dynamic behavior of the force machine has been reduced considerably.

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Determination of the averaging time for precision calibration of a build-up system in a deadweight force machine

Cited by 5 publications

References 1 publication

Analysis of mechanical properties for the key force transfer components of 2 MN deadweight force standard machine

Analysis of mechanical properties for the key force transfer components of 2 MN deadweight force standard machine

Oscillating signal components of a dead-weight force-standard machine and reduction techniques

Reduction of deadweight pendulum motion and its conformation by using a build-up system

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