Development of a Prototype Airborne Conflict Detection and Resolution Simulation Capability

Mondoloni, Stéphane; Palmer, Michael T.; Wing, David J.

doi:10.2514/6.2002-4446

Cited by 17 publications

(10 citation statements)

References 5 publications

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“…Similar to the time-based color coding used in the conflict prevention bands in [15] and [16], a conflict probe can test and show which combinations of track and FPA will result in a loss of separation within a predetermined time horizon.…”

Section: Figure 5 Horizontal and Vertical Separation As A Function Omentioning

confidence: 99%

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A concept for UAV operator involvement in airborne conflict detection and resolution

Tadema

Theunissen

2008

2008 IEEE/AIAA 27th Digital Avionics Systems Conference

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One of the biggest challenges in the development of detect, sense and avoid systems is to achieve both an extremely low missed detection probability and an acceptable false alarm rate. In case of a fully autonomous system, every falsely identified threat will cause an unnecessary avoidance maneuver. In this paper, a concept is described that combines the requirement of collision avoidance function availability and continuity (e.g. in case of a control link failure) with the benefits from operator involvement in the detect, sense and avoid cycle for those situations where the time to conflict provides a sufficient margin. When involving the human operator, it must be ensured that the positive effects of a warranted contribution outweigh the negative effects of an unwarranted one. A second challenge when involving the operator is to find the right balance between system-and operator authority. This paper starts with an identification and analysis of opportunities and constraints. The requirement of function availability in case of a control link failure is translated into a range of possible authority levels for the detect, sense and avoid functions. Based on the results, a concept for operator involvement is proposed and it is illustrated how the level of system authority affects the role of the operator. From an analysis of earlier work in the area of conflict prediction, assessment and resolution, conflict probing is identified as a means to support the operator in determining, selecting and/or assessing maneuvers. To explore the potential of the probing concept, a multi-dimensional conflict probe has been integrated into a cockpit display of traffic information and a head-up display. Results from an initial evaluation show an improvement in the assessment of the traffic situation, resulting in more effective and efficient conflict resolution maneuvers and less unwarranted maneuvers.

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Section: Figure 5 Horizontal and Vertical Separation As A Function Omentioning

confidence: 99%

“…An example is the implementation of so-called conflict prevention bands on the NASA Langley CDTI display [15]. In [16], two different time values (5 minutes and 2 minutes) for a single loss of separation threshold are used, yielding yellow and red bands respectively.…”

Section: Figure 4 Horizontal and Vertical Separation As A Function Omentioning

confidence: 99%

A concept for UAV operator involvement in airborne conflict detection and resolution

Tadema

Theunissen

2008

2008 IEEE/AIAA 27th Digital Avionics Systems Conference

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“…This would increase system complexity, but on the other hand may create solutions to situations that cannot be solved with single-vector maneuvers. In [8] a system is described that uses multi-vector solutions to minimize the extra flying distance due to an avoidance maneuver.…”

Section: Integration Modementioning

confidence: 99%

Integrated conflict resolution for efficient autonomous hazard avoidance

Vries

Theunissen

2007

2007 IEEE/AIAA 26th Digital Avionics Systems Conference

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During a mission, Unmanned Aerial Vehicles (UAVs) are exposed to several types of hazards. These hazards can be divided into two main categories: the static part and the dynamic part of the environment. Databases with the known elements in the static environment and the available information on the dynamic environment form the basis for planning a conflict-free route. New information on the dynamic part of the environment may become available during the mission, thus, possible conflicts with the dynamic part of the environment must be detected and avoided in flight.Since performing an avoidance maneuver may lead to a new conflict with another part of the environment, it is necessary to integrate constraints from the available conflict-detection functions when determining an avoidance maneuver. This paper aims to analyze different approaches to developing an integrated conflict-resolution function. Subsequently, the implementation of the concept in a simulation environment is discussed.

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“…As part of this integration, AOP (as described in [4]) was modified in several ways. CD was expanded to perform state-based CD on the CAZ.…”

Section: Experimental Approachmentioning

confidence: 99%

“…NASA Langley Research Center is developing a research prototype of this toolset, the Autonomous Operations Planner (AOP). AOP is being developed [4,5] to integrate crew preferences, TFM constraints, airspace constraints and traffic information into the planning and execution of efficient autonomous operations.…”

Section: Autonomous Aircraft Operationsmentioning

confidence: 99%

Autonomous aircraft operations using RTCA guidelines for airborne conflict management

Krishnamurthy

Wing

Barmore

et al. 2003

22nd Digital Avionics Systems Conference Proceedings (Cat No 03CH37449) DASC-03

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A human-in-the-loop experiment was performed at the NASA Langley Research Center to study the feasibility of DAG-TM autonomous aircraft operations in highly constrained airspace. The airspace was constrained by a pair of special-use airspace (SUA) regions on either side of the pilot's planned route. Traffic flow management (TFM) constraints were imposed as a required time of arrival and crossing altitude at an en route fix. Key guidelines from the RTCA Airborne Conflict Management (ACM) concept were applied to autonomous aircraft operations for this experiment. These concepts included the RTCA ACM definitions of distinct conflict detection and collision avoidance zones, and the use of a graded system of conflict alerts for the flight crew.Three studies were conducted in the course of the experiment. The first study investigated the effect of hazard proximity upon pilot ability to meet constraints and solve conflict situations. The second study investigated pilot use of the airborne tools when faced with an unexpected loss of separation (LOS). The third study explored pilot interactions in an over-constrained conflict situation, with and without priority rules dictating who should move first.Detailed results from these studies were presented at the 5 th USA/Europe Air Traffic Management R&D Seminar (ATM2003). This overview paper focuses on the integration of the RTCA ACM concept into autonomous aircraft operations in highly constrained situations, and provides an overview of the results presented at the ATM2003 seminar. These results, together with previously reported studies, continue to support the feasibility of autonomous aircraft operations.

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Development of a Prototype Airborne Conflict Detection and Resolution Simulation Capability

Cited by 17 publications

References 5 publications

A concept for UAV operator involvement in airborne conflict detection and resolution

A concept for UAV operator involvement in airborne conflict detection and resolution

Integrated conflict resolution for efficient autonomous hazard avoidance

Autonomous aircraft operations using RTCA guidelines for airborne conflict management

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