Assessment of methodologies to estimate displacements from measured acceleration records

Arias-Lara, Damaris; De-la-Colina, Jaime

doi:10.1016/j.measurement.2017.09.019

Cited by 31 publications

(12 citation statements)

References 21 publications

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“…Recently, Arias-Lara and De la Colina [25] compared different correction methods, considered by the authors of universal application, under conditions of use related with civil engineering. Each studied method is a specific combination of baseline correction, low/high pass filters and forcing the displacement to zero at the end of the data sample; they are performed in a variable number of steps, with or without iterative calculations.…”

Section: Accelerometers Fundamentalsmentioning

confidence: 99%

“…Consequently, it's necessary to implement objective quality indicators that evaluate the deviation of the results with respect to the real signal. First of all, the cross correlation coefficient (CCC) and the root mean square error (RMSE) will be used [25]. Additionally, a final error (FE) is defined, as the deviation of the final value of the measured signal with respect to the maximum measured value.…”

Section: Quality Indicatorsmentioning

confidence: 99%

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Bond Graph Simulation of Error Propagation in Position Estimation of a Hydraulic Cylinder Using Low Cost Accelerometers

2018

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The indirect calculation from acceleration of transversal displacement of the piston inside the body of a double effect linear hydraulic cylinder during its operating cycle is assessed. Currently an extensive effort exists in the improvement of the mechanical and electronic design of the highly sophisticated MEMS accelerometers. Nevertheless, the predictable presence of measurement errors in the current commercial accelerometers is the main origin of velocity and displacement measurement deviations during integration of the acceleration. A bond graph numerical simulation model of the electromechanical system has been developed in order to forecast the effect of several measurement errors in the use of low cost two axes accelerometers. The level of influence is assessed using quality indicators and visual signal evaluation, for both simulations and experimental results. The obtained displacements results are highly influenced by the diverse dynamic characteristics of each measuring axis. The small measuring errors of a simulated extremely high performance sensor generate only moderate effects in longitudinal displacement but deep deviations in the reconstruction of piston transversal movements. The bias error has been identified as the source of the higher deviations of displacement results; although, its consequences can be easily corrected.

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Section: Accelerometers Fundamentalsmentioning

confidence: 99%

Section: Quality Indicatorsmentioning

confidence: 99%

Bond Graph Simulation of Error Propagation in Position Estimation of a Hydraulic Cylinder Using Low Cost Accelerometers

2018

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“…Acceleration sensors are installed on mechanical parts to collect dynamic signals, and the processed signal values are numerically linked with the monitoring indicators obtained from traditional experiments [22,23]. The relationship between roller acceleration and soil dynamic elastic modulus has been determined previously by many researchers [24][25][26][27], and a number of scholars have established the relationship between roller acceleration and compaction meter value (CMV) and compaction control value (CCV) [28][29][30][31]. Other works have also utilized the ratio of fundamental component to harmonic component in acceleration signal to reflect the compactness of soil.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Monitoring Method for Layered Compaction Quality of Loess Subgrade Based on Hydraulic Compactor Reinforcement

Zhou

Yan

et al. 2020

Sensors

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Hydraulic compactor is an efficient reinforcement machine for loess subgrade. However, it is difficult to control the layered compaction quality of the subgrade. This research presents a real-time layered compactness monitoring method for hydraulic compactor reinforcement of subgrade in loess areas. The hydraulic force coefficient is first introduced, and the dynamic response model of the hydraulic rammer and soil is established. The relationship between the acceleration of the hydraulic rammer and the compactness of subgrade is then obtained based on the collision theory in elastic half space. A full-scale test using a hydraulic compactor to reinforce loess subgrade was also carried out. Results show that the hydraulic compactor obtains the effective influence depth for the reinforcement of loess subgrade. Within the effective reinforcement depth, the relationship between the peak acceleration of the rammer and the layered compactness of subgrade can be well fitted by a quadratic function model. The layered compactness of the subgrade and the working state of the hydraulic compactor can then be remotely monitored at a mobile terminal in real time. Furthermore, the monitoring technology was applied to Huangling-Yan’an Expressway in China, significantly improving the accuracy and efficiency of real-time monitoring of the layered compactness of subgrade in the loess area.

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“…A disadvantage of this method is the necessity of double integration of an acceleration signal, which can lead to considerable errors in estimating the displacements. There are various methods of correcting such errors suggested in [22][23][24][25][26], but it is generally not possible to accurately estimate the displacements on the basis of accelerations without additional measurements, such as strain gauge measurements [27,28]. In [29], another solution was presented in which accelerometers were used to define the angles of rotation in place of inclinometers, and the deflection was then determined.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the Static and Dynamic Displacements of Railway Bridges with the Use of Inertial Sensors

Olaszek

Wyczałek

Sala

et al. 2020

Sensors

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In the case of the monitoring of bridges, the determination of vertical displacements is one of the most important issues. A new measuring system has been developed and implemented for assessment of railway bridges based on measurements of the structural response to passing trains. The system uses inertial sensors: Inclinometers and accelerometers that do not need any referential points. The system records signals related to the passage of a train over a monitored bridge. The signals from inclinometers before the train’s entry are used to determine the static movement. Integrated signals from inclinometers and accelerometers are used to determine dynamic displacements when the train goes through the bridge. Signals from inclinometers are used to determine the so-called “quasi-static” component of the displacement and signal from the accelerometer to determine the dynamic component. Field tests have been carried out on a viaduct along a high-speed railway line. Periodic comparative measurements are carried out using a Total Station to verify static measurements and using inductive sensors to verify dynamic measurements. Tests of the system carried out so far have proven its usefulness for monitoring bridges in a high-speed railway (up to 200 km/h) with high accuracy while determining dynamic displacements.

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Assessment of methodologies to estimate displacements from measured acceleration records

Cited by 31 publications

References 21 publications

Bond Graph Simulation of Error Propagation in Position Estimation of a Hydraulic Cylinder Using Low Cost Accelerometers

Bond Graph Simulation of Error Propagation in Position Estimation of a Hydraulic Cylinder Using Low Cost Accelerometers

Real-Time Monitoring Method for Layered Compaction Quality of Loess Subgrade Based on Hydraulic Compactor Reinforcement

Monitoring of the Static and Dynamic Displacements of Railway Bridges with the Use of Inertial Sensors

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