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Research on the Conflict-free4D Trajectory Generating and Perturbation Analysis

Author: ZhangQin
Tutor: TangXinMin
School: Nanjing University of Aeronautics and Astronautics
Course: Transportation Planning and Management
Keywords: 4D trajectory planning hybrid systems maximum algebra perturbation analysis robustness
CLC: V355
Type: Master's thesis
Year: 2012
Downloads: 15
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Abstract


The algorithms for aircrafts trajectory prediction are mainl discussed in the paper, in order thatAs the contradiction between the rapid development of global air transport industry and limitedairspace resource becomes increasingly prominent, In complex airspace with dense air traffic flow.Multi-aircraft conflict-free4D trajectory estimation becomes one of the core technologies for the nextnew generation automatic air traffic control system. To resolve the problem of aircraft conflict in theactual operation of the airspace, aircraft trajectory planning and perturbation analysis are mainlydiscussed in this paper.First of all, according to the given flight profile and aero-dynamics models under differentflight conditions, using dynamics, kinematic principle, BADA flight performance database andhistorical flight data, a hybrid system model is constructed with the feature that state switchesbetween different flight stages, while changes continuously in the same stage. Secondly, due to theaircraft chasing, intersecting, convergence conflict in the actual operation of the airspace,multi-aircraft coupled model and synthetic model is respectively established basing on conflictwaypoints protection zone competition. And according to the air traffic control interval provision,constraint relationship between coupled model input, state and output is established, and the systemdynamic linear equation coordinating aircraft conflicts is set up in the means of maximum algebra.Finally, using perturbation analysis of a discrete event dynamic systems, in connection with theadjusted release time of conflict-free trajectory planning, the sensitivity of the change between aircraftarrival time delay and perturbation size is estimated when virtual disturbance is introduced to a certainparameter, thereby that aircraft has the robustness within some certain range is determined.

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CLC: > Aviation, aerospace > Aviation > Airports (stations), the airport and its management > Air traffic control and flight scheduling
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