NDLI: F-16 database terrain cueing. An investigation of display handling qualities

Content Provider	IEEE Xplore Digital Library
Author	Christensen, K. Weber, G. Seelos, M. Moua, C. Gillen, S.
Copyright Year	1998
Description	Author affiliation: 416th Flight Test Squadron, Edwards AFB, CA, USA (Christensen, K.)
Abstract	Database terrain cueing (DBTC) is one of five functions in the new Digital Terrain System (DTS) to be integrated into all F-16s. The terrain-referenced navigation (TRN) function of the DTS determines aircraft position relative to a stored digital flight map based upon terrain elevation data. The DBTC function provides a vertical steering guidance cue displayed as a box in the head-up display. By keeping the flight path marker in this box, a pilot could fly at a preset terrain clearance. The DBTC function demonstrated military utility by serving as a cue to aid the pilot in terrain masking in low visibility. While trying to closely follow the DBTC box, pilots uncovered a pilot induced oscillation (PIO) problem which was more prevalent at high speeds in rough terrain. To analyze this, the test team developed a tracking task. From the evaluation, the team identified three problems; discrete jumps, jitter, and high sensitivity to pilot inputs at high speeds. Through ground simulation, test team engineers came up with potential solutions to these problems. Low update rate error estimates were removed to minimize the occurrence of discrete jumps. A low-pass filter in the vertical acceleration feedback loop was adjusted to reduce jitter. A velocity dependent lag filter was added to the vertical acceleration feedback loop to reduce high-speed sensitivity. The result was a DBTC system which will be an aid instead of a distraction while terrain masking.
Starting Page	51
Ending Page	58
File Size	1238381
Page Count	8
File Format	PDF
ISBN	0780343115
ISSN	1095323X
DOI	10.1109/AERO.1998.685680
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-03-28
Publisher Place	Colorado
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Databases Displays Aircraft navigation Low pass filters System testing Military aircraft Night vision Eye protection Jitter Acceleration
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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