Design and Flight Evaluation of an Integrated Navigation and Near-Terrain Helicopter Guidance System for Nighttime and Adverse Weather Operations
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1994-08-01
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NTL Classification:NTL-AVIATION-AVIATION;NTL-AVIATION-Aviation Human Factors;NTL-AVIATION-Aviation Safety/Airworthiness;
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Abstract:NASA and the U.S. Army have designed, developed, and flight evaluated a
Computer Aiding for Low-Altitude Helicopter Flight (CALAHF) guidance system.
This system provides guidance to the pilot for near-terrain covert helicopter
operations. It automates the processing of precision navigation information,
helicopter mission requirements, and terrain flight guidance. The automation
is presented to the pilot through symbology on a helmet-mounted display. The
symbology is a "pilot-centered" design that preserves pilot flexibility and
authority over the CALAHF system's automation. An extensive flight evaluation
of the system has been conducted using the U.S. Army's NUH-60 STAR (Systems
Testbed for Avionics Research) research helicopter. The evaluations were flown
over a multiwaypoint helicopter mission in rugged mountainous terrain, at
terrain clearance altitudes from 300 to 125 ft and airspeeds from 40 to 110
knots. The results of these evaluations showed that the pilots could precisely
follow the automation symbology while maintaining a high degree of situational
awareness. 15p.
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