Conflict Free Trajectory Optimisation with Target Tracking and Conformance Monitoring

García-Gascon, Santi Vilardaga; Menéndez, Xavier Prats; Duan, Pengfei; Haag, Maarten Uijt de

doi:10.2514/6.2014-2022

Cited by 6 publications

(8 citation statements)

References 11 publications

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“…Given different spatial and temporal constraints along with the definition of specific objective functions for each purpose, the same problem formulation provides optimisation, prediction and estimation functionalities. The described framework builds upon previous research by the authors presented in [19,20].…”

Section: Ataccs '15mentioning

confidence: 99%

“…In [20], the authors presented a case where a bad assumption of an intruder's mass would produce very inaccurate trajectory predictions. To cope with the issue, a conformance monitoring algorithm was presented that would relaunch a new prediction every time the errors jumped over a specific threshold.…”

Section: Vertical Predictabilitymentioning

confidence: 99%

“…Finally, an aircraft departing trajectory comprehends different flight phases, each with specific performance and geographical constraints. Specific details on the formulation of these phases into the problem is found in [20]. Some collocation and link equations ensure that the different state nodes (collocation points) within a phase are correctly linked to the previous phases in compliance with the dynamic models, and that the phases relate to the time continuum they represent.…”

Section: Operational Constraintsmentioning

confidence: 99%

“…In [19,20] we monitor the conformance of the intruder's current state with respect to the predicted trajectory and relaunch the process when the residuals go over certain threshold, although for simplification, the current paper has set this iterations to happen on a timely basis. This will be integrated in the future.…”

Section: Conclusion and Further Workmentioning

confidence: 99%

“…Again, splines are used to model the intruder's predicted trajectory (Γ pred (t)) [19,20]. Specific details about the optimisation framework are found in section 3.…”

Section: Trajectory Optimisationmentioning

confidence: 99%

See 4 more Smart Citations

Mass Estimation for an Adaptive Trajectory Predictor using Optimal Control

Vilardaga¹,

Prats²

2015

Proceedings of the 5th International Conference on Application and Theory of Automation in Command and Control Systems

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Air traffic predictability is paramount in the air traffic system in order to enable concepts such as Trajectory Based Operations (TBO) and higher automation levels for selfseparation. Whereas in simulated environments 4D conflictfree trajectory optimisation has shown good potential in the improvement of air traffic efficiency, its application to real operations has been very challenging due to the current lack of information sharing between airspace users. Consequently, such operations are still very limited in scope and rarely attempted in dense traffic situations. Better predictability of other traffic future states would be an enabler for each aircraft to fly its user preferred route without decreasing safety in a self-separation context. But this is not an easy task when basic aircraft parameters such as aircraft weight, performance data or airline strategies are not available at the time of prediction. In this paper the authors propose to compensate this hindrance by continuously integrating the state of the surounding traffic to improve the ownship's knowledge of other aircraft's dynamics. Specifically, conventional position (and velocity) messages, as coming from Automatic Dependent Surveillance Broadcast (ADS-B), are integrated at the ownship. Then, an optimisation problem is formulated, using optimal control theory, that minimises the error with the known states, having the parameters of study (i.e. mass) as decision variables. A scenario with two departing trajectories is used to demonstrate the effectiveness of this parameter estimation method. In it, the take-off mass of the potential intruder is estimated onboard the ownship and its impact to conflict detection and resolution is presented, demonstrating the big improvements in predictability and safety.

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Section: Ataccs '15mentioning

confidence: 99%

Section: Vertical Predictabilitymentioning

confidence: 99%

Section: Operational Constraintsmentioning

confidence: 99%

Section: Conclusion and Further Workmentioning

confidence: 99%

“…Again, splines are used to model the intruder's predicted trajectory (Γ pred (t)) [19,20]. Specific details about the optimisation framework are found in section 3.…”

Section: Trajectory Optimisationmentioning

confidence: 99%

See 3 more Smart Citations

Mass Estimation for an Adaptive Trajectory Predictor using Optimal Control

Vilardaga¹,

Prats²

2015

Proceedings of the 5th International Conference on Application and Theory of Automation in Command and Control Systems

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Operating cost sensitivity to required time of arrival commands to ensure separation in optimal aircraft 4D trajectories

Vilardaga¹,

Prats²

2015

Transportation Research Part C: Emerging Technologies

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Trajectory optimisation has shown good potential to reduce environmental impact in aviation. However, a recurring problem is the loss in airspace capacity that fuel optimal procedures pose, usually overcome with speed, altitude or heading advisories that lead to more costly trajectories. This paper aims at the quantification in terms of fuel and time consumption of implementing suboptimal trajectories in a 4D trajectory context that use required times of arrival at specific navigation fixes. A case study is presented by simulating conflicting Airbus A320 departures from two major airports in Catalonia. It is shown how requiring an aircraft to arrive at a waypoint early or late leads to increased fuel burn. In addition, the efficiency of such methods to resolve air traffic conflicts is studied in terms of both fuel burn and resulting aircraft separations. Finally, various scenarios are studied reflecting various airline preferences with regards to cost and fuel burn, as well as different route and conflict geometries for a broader scope of study.

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