DESIGN OF THE HELICOPTER-MOUNTED FLIR SYSTEM WITH FOUR-AXIS GIMBAL STABILIZATION | ||
| International Conference on Aerospace Sciences and Aviation Technology | ||
| Article 34, Volume 9, ASAT Conference, 8-10 May 2001, May 2001, Pages 1-11 PDF (1.53 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/asat.2001.24836 | ||
| Author | ||
| Haeng Bok Lee | ||
| Technology Research Center, Agency for Defense Development, P.O. Box 35-5, Yuseung, Daejon, 305-600, Korea. | ||
| Abstract | ||
| The Helicopter Forward Looking InfraRed (HFLIR) system is a lightweight, multipurpose, thermal imaging sensor for pilotage/navigation, surveillance, search-and-rescue, automatic tracking and targeting. It is a four-axis gimbal assembly, gyrostabilized in both azimuth and elevation. Design conditions for the gimbal assembly include operation and non-operational inertial, thermal, and dynamic loads. Design goals centered on augmenting stiffness and reduce weight to achieve relatively high modal performance, and also a study was performed to select key components in the gimbal hardware that are essential to meeting the performance objectives. A finite element model was used to maximize the fundamental frequency and select the best configuration the inner gimbal assembly of the turret FLIR unit (TFU). As a result, the fundamental frequency of the gimbal assembly met the design and performance requirements and was selected to meeting the performance objectives include torque motors, bearings, seals and position sensors. | ||
| Keywords | ||
| Turret FLIR Unit; Inner Gimbal Assembly; natural frequency; vibration test | ||
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