20 May 2005 Synthetic line-of-sight algorithms for hardware-in-the-loop simulations
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During the flight of guided submunitions, translation of the missile with respect to the designated aimpoint causes a rotation of the Line-of-Sight (LOS) in inertial space. Large transmit arrays or 5 axis CARCO tables are used to perform True LOS (TLOS) for in-band simulations. Both of these TLOS approaches have cost or fidelity issues for RF seekers. Typically RF Hardware-in-the-Loop (HWIL) simulations of these guided submunitions are mounted on a Three Axes Rotational Flight Simulator (TARFS), which is not capable of translation, and utilize a 2 to 3 seeker beam width transmit array. This necessitates using a Synthetic Line-of-Sight (SLOS) algorithm with the TARFS in order to maintain the proper line-of-sight orientation during all phases of flight which typically includes largely varying LOS motion. This paper presents a simple explanation depicting TLOS and SLOS (TARFS) geometry and the seamless boresight/target SLOS algorithm utilized in AMRDEC's RF4 facility for a test article flight profile. In conclusion this paper will summarize the current state of SLOS algorithms utilized at AMRDEC and challenges and possible solutions envisioned in the near future.
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Henri Richard, Henri Richard, Alan Lowman, Alan Lowman, Gary Ballard, Gary Ballard, "Synthetic line-of-sight algorithms for hardware-in-the-loop simulations", Proc. SPIE 5785, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing X, (20 May 2005); doi: 10.1117/12.605628; https://doi.org/10.1117/12.605628

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