Spot-Centroid Determination Algorithms in Semiactive Laser Photodiodes for Artillery Applications
Precision of guided projectiles depends equally on the accuracy in determining the coordinates of the objective and on the exactness of the measurement devices utilized for position and attitude calculation of the projectile. Development of algorithms for low-cost high-precision terminal guidance sy...
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| Vydané v: | Journal of sensors Ročník 2019; číslo 2019; s. 1 - 12 |
|---|---|
| Hlavní autori: | , |
| Médium: | Journal Article |
| Jazyk: | English |
| Vydavateľské údaje: |
Cairo, Egypt
Hindawi Publishing Corporation
01.01.2019
Hindawi John Wiley & Sons, Inc |
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| ISSN: | 1687-725X, 1687-7268 |
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| Abstract | Precision of guided projectiles depends equally on the accuracy in determining the coordinates of the objective and on the exactness of the measurement devices utilized for position and attitude calculation of the projectile. Development of algorithms for low-cost high-precision terminal guidance systems is a cornerstone in research in this field. Semiactive laser (SAL) kits, and particularly quadrant detector devices, have been developed to improve precision in guided weapons. Photodetection system can be functionally divided into two main parts: sensing and processing. The sensed signal is processed to estimate the spot coordinates, i.e., the laser footprint, which provides some information regarding projectile-target relative position, to obtain the needed information for the navigation and guidance algorithms. The electrical intensities that a real sensor provides under laboratory conditions are compared to a mathematical model based on area intersection calculations to simulate the intensities on real flights. Then, four different processing algorithms, two of them rational, and the other two logarithmic, are tested for different spot sizes, which are nonlinear. Proposing an interpolation algorithm based on the four electrical intensities obtained in a semiactive laser quadrant photodetector, laser footprint center estimation is improved for artillery applications. Finally, an example illustrating a projectile flight is employed to compare real and calculated laser footprints in order to select the best algorithm for artillery applications. |
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| AbstractList | Precision of guided projectiles depends equally on the accuracy in determining the coordinates of the objective and on the exactness of the measurement devices utilized for position and attitude calculation of the projectile. Development of algorithms for low-cost high-precision terminal guidance systems is a cornerstone in research in this field. Semiactive laser (SAL) kits, and particularly quadrant detector devices, have been developed to improve precision in guided weapons. Photodetection system can be functionally divided into two main parts: sensing and processing. The sensed signal is processed to estimate the spot coordinates, i.e., the laser footprint, which provides some information regarding projectile-target relative position, to obtain the needed information for the navigation and guidance algorithms. The electrical intensities that a real sensor provides under laboratory conditions are compared to a mathematical model based on area intersection calculations to simulate the intensities on real flights. Then, four different processing algorithms, two of them rational, and the other two logarithmic, are tested for different spot sizes, which are nonlinear. Proposing an interpolation algorithm based on the four electrical intensities obtained in a semiactive laser quadrant photodetector, laser footprint center estimation is improved for artillery applications. Finally, an example illustrating a projectile flight is employed to compare real and calculated laser footprints in order to select the best algorithm for artillery applications. |
| Author | de Celis, Raúl Cadarso, Luis |
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| Cites_doi | 10.1109/TAES.2003.1207257 10.1016/j.measurement.2007.08.002 10.1109/TIM.2007.895584 10.1063/1.1145815 10.1016/j.ast.2017.01.026 10.1155/2018/5394057 10.1155/2016/7294907 10.1155/2016/7279081 10.1109/7.303745 10.1016/0263-2241(89)90010-9 10.1155/2015/503852 10.1109/TAES.2008.4655347 10.1049/iet-map.2014.0046 10.1109/7361.983473 |
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| Copyright | Copyright © 2019 Raul de Celis and Luis Cadarso. Copyright © 2019 Raul de Celis and Luis Cadarso. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. http://creativecommons.org/licenses/by/4.0 |
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| SubjectTerms | Accuracy Aerospace engineering Algorithms Computer simulation Footprints Guidance systems Guided missiles Interpolation Lasers Measuring instruments Military supplies Photodiodes Position measurement Projectiles Sensors Signal processing Terminal guidance Weapons |
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| Title | Spot-Centroid Determination Algorithms in Semiactive Laser Photodiodes for Artillery Applications |
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