An integrated conflict avoidance concept for aviation

Tadema, J.; Theunissen, E.

doi:10.1109/dasc.2009.5347462

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…In related research, display formats have been designed to provide the operator with spatial and temporal awareness of the conflict space using conflict probes [6,7]. Figure 3 shows the PFD discussed in [7].…”

Section: Providing the Pilot With Spatial And Temporal Awarenessmentioning

confidence: 99%

Maximizing the use of the vertical maneuver space for conflict prevention and resolution: Concept, implementation and evaluation

Rademaker

Theunissen

Lambregts

2010

29th Digital Avionics Systems Conference

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In previous work it has been illustrated, that the use of a zoom-maneuver as an option for conflict prevention/resolution maneuvers can extend the solution space. When performing a zoom-maneuver as part of a conflict prevention maneuver the velocity changes, affecting the time to the predicted loss of separation. Furthermore, the exchange from kinetic to potential energy is not completely lossless. With a higher load factor, the increase in drag will reduce the efficiency of the conversion, yielding a smaller amount of gained potential energy (altitude) for the same amount of kinetic energy. Finally, the rate at which excess kinetic energy can be exchanged for altitude is limited by the allowable load factor. An important aspect is the predictability of the effects. These factors have to be taken into account when designing a conflict prevention / resolution function that relies on the ability to perform a zoom maneuver to extend the solution space. To evaluate the impact of these factors, and identify possible trade-offs, the Total Energy Control System has been enhanced with an autonomous zoom capability. Using the resulting implementation, a number of simulations have been performed for different initial conditions, load factors and vehicle configurations. This paper discusses the concept, design questions, implementation and evaluation in more detail.

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Section: Providing the Pilot With Spatial And Temporal Awarenessmentioning

confidence: 99%

Maximizing the use of the vertical maneuver space for conflict prevention and resolution: Concept, implementation and evaluation

Rademaker

Theunissen

Lambregts

2010

29th Digital Avionics Systems Conference

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“…A conflict probe estimates the future separation with other traffic, both for the current state of ownship and variations to this state, using assumptions on how traffic will maneuver [1][2][3][4][5]. The estimates can be obtained from a conflict detection algorithm such as described in DO-317 [6].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the impact of sensor data uncertainty and maneuver uncertainty in a conflict probe

Tadema

Theunissen

Rademaker

et al. 2010

29th Digital Avionics Systems Conference

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A conflict probe estimates the future separation with other traffic, both for the current state of ownship and variations to this state, using assumptions on how traffic will maneuver. The separation margin between ownship and traffic used in the separation requirements accounts for i) sufficient spatial and temporal margin to restore separation in case it is lost and ii) uncertainty in the current and future position data. Uncertainty in the traffic state data can be attributed to sensor inaccuracies, datalink latency, limitations of the extrapolation models and pilot / automation actions that can not be taken into account in the extrapolation models. The goal of the research described in this paper is to use a priori and on-line sensor performance characteristics and knowledge regarding potential maneuvers of the other traffic to specify conflict probe and conflict resolution system parameters. As part of the approach to achieve this, a sensor simulation tool has been integrated with an experimental and configurable conflict probing implementation. This paper discusses the effects of uncertainty in traffic state data on conflict probing and the corresponding evasive maneuver strategy, based on simulation results for different sensor and probe settings and conflict geometries. Additionally, a demonstrator graphical user interface concept to provide information about the uncertainty and an integrated simulation setup are discussed.

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“…Furthermore, the lack of integrated strategic information for predictive SA and planning ahead is identified. In [12] it is discussed how conflict probing can provide a common framework for the computation of coordinated conflict avoidance maneuvers that include integration of multiple types of hazards and constraints such as vehicle performance and right-of-way rules. To illustrate this, Fig.…”

Section: Integration Of Constraints and Other Hazardsmentioning

confidence: 99%

Self-Separation Support for UAS

Tadema

Theinissen

Kirk

2010

AIAA Infotech@Aerospace 2010

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Recent guidance from the U.S. Federal Aviation Administration suggests that self separation needs to be a component of an Unmanned Aircraft System Sense and Avoid solution. The greater time horizon associated with self separation allows for pilot-in-the-loop operation, and, in fact, the nature of self separation demands more pilot involvement. The ability to effectively conduct pilot-in-the-loop self separation will be critically dependent on decision aides and advanced displays that allow pilots to make accurate and timely maneuvering decisions. This paper starts with a presentation of eight criteria that should be considered when defining requirements for a future separation assurance and collision avoidance system. Using these criteria, it is illustrated how the concept of conflict probing and the associated scalability enables a range of possible implementations, specifically matched to the available data, interfaces and displays.

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An integrated conflict avoidance concept for aviation

Cited by 8 publications

References 7 publications

Maximizing the use of the vertical maneuver space for conflict prevention and resolution: Concept, implementation and evaluation

Maximizing the use of the vertical maneuver space for conflict prevention and resolution: Concept, implementation and evaluation

Evaluating the impact of sensor data uncertainty and maneuver uncertainty in a conflict probe

Self-Separation Support for UAS

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