Preprints
https://doi.org/10.5194/gi-2020-38
https://doi.org/10.5194/gi-2020-38

  15 Dec 2020

15 Dec 2020

Review status: this preprint is currently under review for the journal GI.

Magnetic interference mapping of four types of unmanned aircraft systems intended for aeromagnetic surveying

Loughlin E. Tuck1, Claire Samson1, Jeremy Laliberté2, and Michael Cunningham1 Loughlin E. Tuck et al.
  • 1Dept. of Earth Sciences, Carleton University, 1125 Colonel By Dr., Ottawa, ON, Canada K1S 5B6
  • 2Dept. of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada K1S 5B6

Abstract. Magnetic interference source identification is a critical preparation step for magnetometer-mounted unmanned aircraft systems (UAS) used for high-sensitivity geomagnetic surveying. A magnetic field scanner was built for mapping the interference that is produced by a UAS. It was used to compare four types of electric-powered UAS capable of carrying an alkali-vapour magnetometer: (1) a single-motor fixed-wing, (2) a single-rotor helicopter, (3) a quad-rotor helicopter, and (4) a hexa-rotor helicopter. The scanner’s error was estimated by calculating the root-mean-square deviation of the background total magnetic intensity over the mapping duration; averaged values ranged between 3.1–7.4 nT. Each mapping was performed above the UAS with the motor(s) engaged and with the UAS facing in two orthogonal directions; peak interference intensities ranged between 21.4–574.2 nT. For each system, the interference is a combination of both ferromagnetic and electrical current sources. Major sources of interference were identified such as servo(s) and the cables carrying direct current between the motor battery and the electronic speed controller. Magnetic intensity profiles were measured at various motor current draws for each UAS and a change in intensity was observed for currents as low as 1 A.

Loughlin E. Tuck et al.

 
Status: open (until 06 Feb 2021)
Status: open (until 06 Feb 2021)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Loughlin E. Tuck et al.

Loughlin E. Tuck et al.

Viewed

Total article views: 285 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
240 42 3 285 3 3
  • HTML: 240
  • PDF: 42
  • XML: 3
  • Total: 285
  • BibTeX: 3
  • EndNote: 3
Views and downloads (calculated since 15 Dec 2020)
Cumulative views and downloads (calculated since 15 Dec 2020)

Viewed (geographical distribution)

Total article views: 263 (including HTML, PDF, and XML) Thereof 260 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 22 Jan 2021
Download
Short summary
This paper presents a novel method for locating magnetic interference sources on unmanned aircraft systems (UAS) destined for aeromagnetic surveys. The technique is demonstrated in an indoor laboratory whereas most magnetic mapping has previously been done outdoors and is performed on 4 different types of UAS with their motors engaged. Sources are discussed on each UAS platform, but can also be used as a point of reference for typical components that cause interference.