Tactical Conflict Detection And Resolution In A 3 D Airspace
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Tactical Conflict Detection and Resolution in a 3-D Airspace
Abstract: "This paper presents an algorithm for detection and resolution of air traffic conflicts in a 3-dimensional (3-D) airspace for two aircraft, namely ownship and intruder. A conflict is a projected incursion of the intruder aircraft within the protected zone of the ownship. A solution is a single maneuver, to be performed by the ownship, that effectively keeps the required minimum separation without cooperation of the intruder aircraft. The input to the algorithm is the state information, i.e., horizontal position, altitude, ground track, and vertical and ground speed, of both aircraft. The algorithm outputs a set of solutions. Each solution modifies only one state parameter of the ownship: ground track, ground speed, or vertical speed. The proposed algorithm is suitable for formal verification."
On the Formal Verification of Conflict Detection Algorithms
Safety assessment of new air traffic management systems is a main issue for civil aviation authorities. Standard techniques such as testing and simulation have serious limitations in new systems that are significantly more autonomous than the older ones. This paper presents an innovative approach, based on formal verification, for establishing the correctness of conflict detection systems. Fundamental is the concept of trajectory, which is a continuous path in the x-y plane constrained by physical laws and operational requirements. From the Model of trajectories, the authors extract, and formally prove, high level properties that can serve as a framework to analyze conflict scenarios. They use the AILS alerting algorithm as a case study.
Correct Hardware Design and Verification Methods
This volume contains the proceedings of CHARME 2001, the Eleventh Advanced Research Working Conference on Correct Hardware Design and Veri?cation Methods. CHARME 2001 is the 11th in a series of working conferences devoted to the development and use of leading-edge formal techniques and tools for the design and veri?cation of hardware and hardware-like systems. Previous events in the ‘CHARME’ series were held in Bad Herrenalb (1999), Montreal (1997), Frankfurt (1995), Arles (1993), and Torino (1991). This series of meetings has been organized in cooperation with IFIP WG 10.5 and WG 10.2. Prior meetings, stretching backto the earliest days of formal hardware veri?cation, were held under various names in Miami (1990), Leuven (1989), Glasgow (1988), Grenoble (1986), Edinburgh (1985), and Darmstadt (1984). The convention is now well-established whereby the European CHARME conference alternates with its biennial counterpart, the International Conference on Formal Methods in Computer-Aided Design (FMCAD), which is held on even-numbered years in the USA. The conference tookplace during 4–7 September 2001 at the Institute for System Level Integration in Livingston, Scotland. It was co-hosted by the - stitute and the Department of Computing Science of Glasgow University and co-sponsored by the IFIP TC10/WG10.5 Working Group on Design and En- neering of Electronic Systems. CHARME 2001 also included a scienti?c session and social program held jointly with the 14th International Conference on Th- rem Proving in Higher Order Logics (TPHOLs), which was co-located in nearby Edinburgh.