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Proceedings Paper

Resonant scanning mechanism
Author(s): John Wallace; Mike Newman; Homero Gutierrez; Charlie Hoffman; Tim Quakenbush; Dan Waldeck; Christopher Leone; Miro Ostaszewski
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Paper Abstract

Ball Aerospace & Technologies Corp. developed a Resonant Scanning Mechanism (RSM) capable of combining a 250- Hz resonant scan about one axis with a two-hertz triangular scan about the orthogonal axis. The RSM enables a rapid, high-density scan over a significant field of regard (FOR) while minimizing size, weight, and power requirements. The azimuth scan axis is bearing mounted allowing for 30° of mechanical travel, while the resonant elevation axis is flexure and spring mounted with five degrees of mechanical travel. Pointing-knowledge error during quiescent static pointing at room temperature across the full range is better than 100 μrad RMS per axis. The compact design of the RSM, roughly the size of a soda can, makes it an ideal mechanism for use on low-altitude aircraft and unmanned aerial vehicles. Unique aspects of the opto-mechanical design include i) resonant springs which allow for a high-frequency scan axis with low power consumption; and ii) an independent lower-frequency scan axis allowing for a wide FOR. The pointing control system operates each axis independently and employs i) a position loop for the azimuth axis; and ii) a unique combination of parallel frequency and amplitude control loops for the elevation axis. All control and pointing algorithms are hosted on a 200-MHz microcontroller with 516 KB of RAM on a compact 3”×4” digital controller, also of Ball design.

Paper Details

Date Published: 7 October 2014
PDF: 10 pages
Proc. SPIE 9220, Infrared Sensors, Devices, and Applications IV, 92200C (7 October 2014); doi: 10.1117/12.2061069
Show Author Affiliations
John Wallace, Ball Aerospace & Technologies Corp. (United States)
Mike Newman, Ball Aerospace & Technologies Corp. (United States)
Homero Gutierrez, Ball Aerospace & Technologies Corp. (United States)
Charlie Hoffman, Ball Aerospace & Technologies Corp. (United States)
Tim Quakenbush, Ball Aerospace & Technologies Corp. (United States)
Dan Waldeck, Ball Aerospace & Technologies Corp. (United States)
Christopher Leone, Ball Aerospace & Technologies Corp. (United States)
Miro Ostaszewski, Ball Aerospace & Technologies Corp. (United States)


Published in SPIE Proceedings Vol. 9220:
Infrared Sensors, Devices, and Applications IV
Paul D. LeVan; Ashok K. Sood; Priyalal Wijewarnasuriya; Arvind I. D'Souza, Editor(s)

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