Evaluation of three optical-encoder-based speed estimation methods for motion control.
Three speed estimation methodologies: pulse count, elapsed time, and constant sample-time digital tachometer (CSDT) methods, used with optical incremental encoders, are implemented and compared in a closed-loop system setup using a specialised...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-04-01
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| Series: | The Journal of Engineering |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8058 |
| _version_ | 1819069306550353920 |
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| author | Yeny Vazquez-Gutierrez Dara L. O'Sullivan Richard C. Kavanagh |
| author_facet | Yeny Vazquez-Gutierrez Dara L. O'Sullivan Richard C. Kavanagh |
| author_sort | Yeny Vazquez-Gutierrez |
| collection | DOAJ |
| description | Three speed estimation methodologies: pulse count, elapsed time, and constant sample-time digital
tachometer (CSDT) methods, used with optical incremental encoders, are
implemented and compared in a closed-loop system setup using a specialised
Analog Devices CM403f DSP. Dedicated hardware for quadrature encoders on the DSP
facilitates the implementation of advanced speed estimation methods, such as the
CSDT, by minimising the delay resulting from software intervention. The error of
each methodology is evaluated theoretically and experimentally. The CSDT has
limited error over all its speed range. The error of the elapsed time method
increases as the speed increases. On the contrary, the relative error of the
pulse count method (which is often substantial) decreases with increased speed.
Several filtering techniques can be used to reduce the error of the elapsed time
method; here an oversampling technique is implemented with that aim. |
| first_indexed | 2024-12-21T16:47:57Z |
| format | Article |
| id | doaj.art-3d89f146d7ce4f9cb869b1771781ec02 |
| institution | Directory Open Access Journal |
| issn | 2051-3305 |
| language | English |
| last_indexed | 2024-12-21T16:47:57Z |
| publishDate | 2019-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Journal of Engineering |
| spelling | doaj.art-3d89f146d7ce4f9cb869b1771781ec022022-12-21T18:56:57ZengWileyThe Journal of Engineering2051-33052019-04-0110.1049/joe.2018.8058JOE.2018.8058Evaluation of three optical-encoder-based speed estimation methods for motion control.Yeny Vazquez-Gutierrez0Dara L. O'Sullivan1Richard C. Kavanagh2School of Engineering, University College CorkAnalog Devices IncSchool of Engineering, University College CorkThree speed estimation methodologies: pulse count, elapsed time, and constant sample-time digital tachometer (CSDT) methods, used with optical incremental encoders, are implemented and compared in a closed-loop system setup using a specialised Analog Devices CM403f DSP. Dedicated hardware for quadrature encoders on the DSP facilitates the implementation of advanced speed estimation methods, such as the CSDT, by minimising the delay resulting from software intervention. The error of each methodology is evaluated theoretically and experimentally. The CSDT has limited error over all its speed range. The error of the elapsed time method increases as the speed increases. On the contrary, the relative error of the pulse count method (which is often substantial) decreases with increased speed. Several filtering techniques can be used to reduce the error of the elapsed time method; here an oversampling technique is implemented with that aim.https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8058closed loop systemstachometersdigital signal processing chipssignal samplingmotion controlvelocity controldigital controlfiltering theoryoptical-encoder-based speed estimation methodsmotion controlspeed estimation methodologiesconstant sample-time digital tachometer methodsCSDToptical incremental encodersquadrature encodersadvanced speed estimation methodsrelative errorpulse count methodelapsed time methodclosed-loop systemelapsed timespecialised analogue devices CM403f DSPfiltering techniquesoversampling techniquedelay minimisationsoftware interventionerror reduction |
| spellingShingle | Yeny Vazquez-Gutierrez Dara L. O'Sullivan Richard C. Kavanagh Evaluation of three optical-encoder-based speed estimation methods for motion control. The Journal of Engineering closed loop systems tachometers digital signal processing chips signal sampling motion control velocity control digital control filtering theory optical-encoder-based speed estimation methods motion control speed estimation methodologies constant sample-time digital tachometer methods CSDT optical incremental encoders quadrature encoders advanced speed estimation methods relative error pulse count method elapsed time method closed-loop system elapsed time specialised analogue devices CM403f DSP filtering techniques oversampling technique delay minimisation software intervention error reduction |
| title | Evaluation of three optical-encoder-based speed estimation methods for motion control. |
| title_full | Evaluation of three optical-encoder-based speed estimation methods for motion control. |
| title_fullStr | Evaluation of three optical-encoder-based speed estimation methods for motion control. |
| title_full_unstemmed | Evaluation of three optical-encoder-based speed estimation methods for motion control. |
| title_short | Evaluation of three optical-encoder-based speed estimation methods for motion control. |
| title_sort | evaluation of three optical encoder based speed estimation methods for motion control |
| topic | closed loop systems tachometers digital signal processing chips signal sampling motion control velocity control digital control filtering theory optical-encoder-based speed estimation methods motion control speed estimation methodologies constant sample-time digital tachometer methods CSDT optical incremental encoders quadrature encoders advanced speed estimation methods relative error pulse count method elapsed time method closed-loop system elapsed time specialised analogue devices CM403f DSP filtering techniques oversampling technique delay minimisation software intervention error reduction |
| url | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8058 |
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