Optimized estimator for real-time dynamic displacement measurement using accelerometers

Simple item page
dc.contributor.authorAbir, Jonathan
dc.contributor.authorLongo, Stefano
dc.contributor.authorMorantz, Paul
dc.contributor.authorShore, Paul
dc.date.accessioned2016-08-04T16:57:11Z
dc.date.available2016-08-04T16:57:11Z
dc.date.issued2016-07-30
dc.description.abstractThis paper presents a method for optimizing the performance of a real-time, long term, and accurate accelerometer based displacement measurement technique, with no physical reference point. The technique was applied in a system for measuring machine frame displacement. The optimizer has three objectives with the aim to minimize phase delay, gain error and sensor noise. A multi-objective genetic algorithm was used to find Pareto optimal estimator parameters. The estimator is a combination of a high pass filter and a double integrator. In order to reduce the gain and phase errors two approaches have been used: zero placement and pole-zero placement. These approaches were analysed based on noise measurement at 0g-motion and compared. Only the pole-zero placement approach met the requirements for phase delay, gain error, and sensor noise. Two validation experiments were carried out with a Pareto optimal estimator. First, long term measurements at 0g-motion with the experimental setup were carried out, which showed displacement error of 27.6 ± 2.3 nm. Second, comparisons between the estimated and laser interferometer displacement measurements of the vibrating frame were conducted. The results showed a discrepancy lower than 2 dB at the required bandwidth.en_UK
dc.identifier.citationJonathan Abir, Stefano Longo, Paul Morantz, Paul Shore, Optimized estimator for real-time dynamic displacement measurement using accelerometers, Mechatronics, Volume 39, November 2016, Pages 1-11en_UK
dc.identifier.issn0957-4158
dc.identifier.urihttp://dx.doi.org/10.1016/j.mechatronics.2016.07.003.
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/10228
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAccelerometeren_UK
dc.subjectDisplacement estimationen_UK
dc.subjectFlexible frameen_UK
dc.subjectHeave filteren_UK
dc.subjectVirtual metrology frameen_UK
dc.titleOptimized estimator for real-time dynamic displacement measurement using accelerometersen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Optimized_estimator_for_real-time_dynamic_displacement_measurement_using_accelerometers_2016.pdf
Size:
3.48 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)