NDLI: Design principles and algorithm development for two types of NextGen airborne conflict detection and collision avoidance

Content Provider	IEEE Xplore Digital Library
Author	Chamlou, R.
Copyright Year	2010
Description	Author affiliation: Center for Advanced Aviation System Development, The MITRE Corporation, McLean, Virginia, USA (Chamlou, R.)
Abstract	As the aviation community moves toward the Next Generation Air Transportation System (NextGen), the current Traffic Alert and Collision Avoidance System (TCAS II) may become inadequate. This paper describes two types of algorithms that use Automatic Dependent Surveillance-Broadcast (ADS-B) as the surveillance source for future airborne collision avoidance systems (CASs). The first type, denoted by NextCAS I, estimates the range, range rate, altitude and altitude rate from the ADS-B state vector information but maintains much of the detection and all of the resolution logic structure of the current TCAS. The second type, denoted by NextCAS II, provides a novel approach to detection and resolution of air traffic conflicts in the 3-dimensional (3-D) airspace between two aircraft. The inputs to the detection algorithm are the current 3-D position and speed vector of both aircraft and a cylindrical minimum safety protection zone (PZ) around the conflicting aircraft. For a CAS, the size of the configurable PZ can be assigned values that the Federal Aviation Administration (FAA) considers as a near mid-air collision (NMAC1) incident. When available, additional inputs, such as measurement uncertainties and intruder type (e.g., manned/unmanned), can be used to alter the default protection zone. The conflict detection takes into account the 3-D encounter (e.g., closure rate, miss distance, relative converging maneuver). The resolution algorithm initially computes a set of six resolution advisories (RAs) and associated resolution alert times that ensure no violation of the protection zone. The six resolutions consist of three sets of two maneuvers related to: ground track (left, right), forward speed (speed up, slow down), and vertical speed (climb, descend). The 1 NMAC - The NMAC is defined by a cylindrical volume with a radius of 500 ft and a height of 200 ft, centered on each aircraft. initial solutions take into account ownship capability (i.e., max climb/descent rate, max turn rate, max speed/stall speed) and ownship pilot response delay (e.g., autonomous vs. manual RA execution). These six solutions are subsequently down-selected in two steps: first, based on the encounter geometry, a single implicitly coordinated, independent solution is selected for each of the three dimensions; then, based on ownship preferences and operational considerations, a final RA solution is selected.
File Size	728576
File Format	PDF
ISBN	9781424474578
ISSN	21554951
e-ISBN	9781424474592
DOI	10.1109/ICNSURV.2010.5503327
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Algorithm design and analysis Surveillance FAA Air transportation Air traffic control Logic Collision avoidance Aircraft Protection State estimation
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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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
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