Accelerometer identification using shock excitation

Link, Alfred; Martens, Hans-Jürgen von

doi:10.1016/j.measurement.2003.08.007

Cited by 35 publications

(19 citation statements)

References 4 publications

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“…Often the phase is omitted [4,6] resulting in a calibration only applicable when measuring nearly harmonic signals. System identification [7] is sometimes applied to convert experimentally determined infinite-dimensional FRFs [8] to a parametrized form [3,9] convenient for analysis. This operation also verifies the correctness of the model.…”

Section: Introductionmentioning

confidence: 99%

A novel method of estimating dynamic measurement errors

Hessling¹

2006

Meas. Sci. Technol.

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A method for estimating an upper bound of the dynamic measurement error in the time domain is derived, starting from the transfer function of the system. Labeled response uncertainty, this dynamic error bound can be included in the conventional measurement uncertainty. A typical system for measuring force, pressure or acceleration is here evaluated using this measure. The linear dynamic error arises for two reasons: Varying amplification and delay with frequency. The latter is analogous to the wellknown bandwidth limiting dispersion of signals in transmission systems. For wide spectrum signals/pulses the asymptotic tails of the spectra may generate the major part of the error. No widespread robust, general and systematic method of quantifying the measurement error caused by these effects exists, despite that they may generate signal distortion far beyond the common prediction.

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Section: Introductionmentioning

confidence: 99%

A novel method of estimating dynamic measurement errors

Hessling¹

2006

Meas. Sci. Technol.

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“…The accelerometer can be regarded as a single-degree-of-freedom (SDOF) mechanical system (Link and Von Martens, 2004). It is often modelled by a simple mass m, called proofmass, attached to a spring of stiffness k and a dashpot with damping coefficient c (Figure 1).…”

Section: Numerical Integrator For Accelerometersmentioning

confidence: 99%

A novel numerical integrator for velocity and position estimation

Thenozhi

Garrido

2013

Transactions of the Institute of Measurement and Control

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Velocity and position are the most important signals used in industrial controllers such as proportional-integral-derivative controllers. While in some real-time applications like structural control, acceleration measurements are easily accessible via accelerometers. The velocity and position have to be estimated from the measured acceleration. In this paper, offset cancellation and high-pass filtering techniques are combined effectively to solve common problems in numerical integration of acceleration signals in real-time applications. The integration accuracy is improved compared with other numerical integrators. Experimental results on a linear servo actuator and a shake table illustrate the effectiveness of the proposed method.

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“…An on-board ultrahigh-g deceleration-time recorder, which is based on the proposed design, was installed at 'Test point'; the experimental setting is shown in figure 7 Next, the new on-board system and the sensor must carry out dynamic calibration together, as shown in figure 8. Based on ISO 16063-13, a laser interferometer (a modified Michelson-type laser interferometer) was set as the primary standard source [17,[33][34][35][36] at Test point (figure 8(a)) to measure variations of the real acceleration and time. Figure 8(b) shows the acceleration-time data recorded by the on-board measurement system in the dynamic calibration experiment.…”

Section: Experiments and Calibrationmentioning

confidence: 99%

Restraining zero drift in an ultrahigh-gimpact environment

Xia

Fan

Xing

et al. 2012

Meas. Sci. Technol.

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To restrain the zero drift of a piezoelectric accelerometer and the zero drift from a charge amplifier (CA) in an ultrahigh-g impact environment, a reformative design approach for an on-board ultrahigh-g deceleration-time measurement system is presented. First, a simplified zero-drift model of the on-board ultrahigh-g deceleration-time measurement system is built. Secondly, possible reasons for zero drifts in the ultrahigh-g impact environment are discussed. Then, a universal reformative CA and subsequent circuits are designed for restraining the zero drift. Finally, an air cannon is used to simulate the ultrahigh-g impact environment and a modified Michelson-type laser interferometer is set as a primary standard source to calibrate the reformative on-board measurement system. Comparisons between the measured curve and the reference curve verify that the zero drift is less than 3% of the peak value and deceleration-time data describe the real penetration process accurately. All differences in curves are not due to the proposed design and can be characterized by errors or uncertainties. Experimental results prove that the proposed design approach can restrain the zero drift effectively in the ultrahigh-g impact environment.

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Accelerometer identification using shock excitation

Cited by 35 publications

References 4 publications

A novel method of estimating dynamic measurement errors

A novel method of estimating dynamic measurement errors

A novel numerical integrator for velocity and position estimation

Restraining zero drift in an ultrahigh-gimpact environment

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