Designing 4-D trajectories for super-dense operations given weather constraints

Krozel, Jimmy; Mitchell, Joseph S. B.; Prete, Joseph; Smith, Philip J.; Andre, Anthony D.

doi:10.1109/dasc.2007.4391821

Cited by 6 publications

(6 citation statements)

References 7 publications

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“…As illustrated in the literature (29,51) , the aircraft's total gross weight gw and the position of its centre of gravity cg specified as a percentage of the mean aerodynamic chord length (% MAC) are dependent on the aircraft's zero fuel gross weight zfgw, zero fuel weight centre-of-gravity position zfwcg, and fuel weight fuel, as described in Equations (15) and (16):…”

Section: Gross Weight and Centre-of-gravity Positionmentioning

confidence: 99%

“…The final gw and cg values are computed using Equations (15) and (16). For a level-flight constant-speed cruise segment the look-up structure data provides the values corresponding to the flying altitude, IAS/Mach speed, initial gross weight, fuelburn, TAS, still-air flight time, and horizontal distance.…”

Section: The Vertical and Lateral Flight Plan Computation Using The Vmentioning

confidence: 99%

“…The computation of the flight path segment's complete set of still-air parameters is performed in a manner similar to that used for the climb-acceleration or descent-deceleration segments, using Equations (17)- (22) and 26- (32), where d alt = 0. The final gw and cg values are computed using Equations (15) and (16). The final speed, average segment speed, and actual segment flight time are computed considering a uniform deceleration relative to the aircraft's IAS/Mach.…”

Section: The Vertical and Lateral Flight Plan Computation Using The Vmentioning

confidence: 99%

“…The flight plan data can also be computed by ground-based algorithms, such as the algorithms used by the Air Traffic Management (ATM) for traffic prediction, planning, and supervision. These algorithms have expanded the series of functions used for aircraft flight path computation (4)(5)(6)(7)(8)(9)(10) by facilitating specific tasks such as conflicts detection and resolution (11,12) , circumventing areas affected by adverse weather (10,(13)(14)(15)(16) , route selection (13)(14)(15)(16)(17) , and developing of routing strategies for traffic flow augmentation (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) .…”

Section: Introductionmentioning

confidence: 99%

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Vertical flight path segments sets for aircraft flight plan prediction and optimisation

Dancila

Botez

2018

Aeronaut. j.

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The paper presents a method for constructing a set of vertical flight path segments, that would compose an aircraft's vertical flight envelope, by using an aircraft performance model. This method is intended to be used for aircraft flight plan prediction and optimisation algorithms. The goal is to reduce the volume of recurring segment performance computations currently required for flight plan prediction or optimisation. The method presented in this paper applies to a free-flight scenario. The flight-path segments composing the vertical flight envelope belong to one of the unrestricted climb, constant-speed level flight, step-climb and continuous descent segments, performed at the consigned climb, cruise and descent speed schedules and at the consigned air temperature values. The method employs an aircraft model using linear interpolation tables. Nine test scenarios were utilised to assess the performances of the resulting flight envelopes as a function of the number of cruise altitudes and descent flight paths. The set of evaluated performance parameters includes the range of total flight times and still-air flight distances, and the vertical profiles describing the minimum and maximum flight times, and still-air flight distances. The advantages of the proposed method are multiple. First, it eliminates the need for repetitive aircraft performance computations of identical vertical flight plan segments, and provides the means for quick retrieval of the corresponding performance data for use in the construction of a full flight plan. Second, the vertical flight path look-up structure and the vertical flight-path graph describe a set of vertical flight paths that consider an aircraft's and flight plan's configuration parameters and cover its maximum flight envelope. Third, the look-up structure and the graph provide the means for rapid and clear identification of the available options for constructing a flight-plan segment, as well as for detecting the points associated with changes in the flight phases, including climb, cruise, step-climb and descent.

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Section: Gross Weight and Centre-of-gravity Positionmentioning

confidence: 99%

Section: The Vertical and Lateral Flight Plan Computation Using The Vmentioning

confidence: 99%

Section: The Vertical and Lateral Flight Plan Computation Using The Vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vertical flight path segments sets for aircraft flight plan prediction and optimisation

Dancila

Botez

2018

Aeronaut. j.

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“…Prior work has defined the operational concept for SDO [KMP07a,KSS07,SSK07] and algorithmic solutions to capacity estimation for SDO [KMP07b,KPM08,KZK09], routing around convective weather hazards in SDO airspace [KPP07,PKM08], human factors issues related to the SDO design [SSE08,SSE09,SAS09], and strategic Traffic Flow Management (TFM) to set up SDO in the transition airspace [JK08]. However, in order for SDO to mature in terms of technology readiness level, the operational concept and related algorithms must be adapted to consider both nominal as well as off-nominal conditions.…”

Section: Introductionmentioning

confidence: 99%

Strategies to Mitigate Off-Nominal Events in Super Dense Operations

Krozel

Shang

Polishchuk

2011

AIAA Guidance, Navigation, and Control Conference

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Given the concept of operations defining the nominal conditions for Super Dense Operations (SDO) in the Next Generation Air Transportation System (NextGen), we investigate strategies to mitigate off-nominal events that disrupt SDO. We are interested in short-duration off-nominal events in which SDO is temporarily interrupted, and through mitigation strategies, the system can eventually return to nominal SDO conditions. In this paper, we study a range of off-nominal events that can be mitigated through algorithmic traffic flow management approaches. Abbreviations 4DT 4

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Flight phase and altitude-dependent geometrical vertical flight plan optimization minimizing the total number of vertical plan segments

Dancila

Beulze

Botez

2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper presents a new method for the geometrical construction of an optimal vertical flight plan associated to a provided lateral flight plan defined as a succession of waypoints characterized by their along-the-track distance relative to the first waypoint and their constraints. The principal objective of the proposed method is the minimization of the total number of vertical flight plan segments, whose slope values closest match the values set for their corresponding flight phase and altitude. The main advantage of the proposed method is that it constructs the optimized vertical flight plan employing faster—and less-intensive computations than methods based solely on aircraft performance models. Also, the proposed algorithm has the advantage of generating ground-fixed predicted vertical flight plans which, when flown, are less sensitive to varying wind conditions, thus, smaller trajectory deviations than those computed using solely the model-based algorithms. Two implementations corresponding to different trade-offs between conflicting preferred gradient and minimal segment length constraints were compared. The results show that a vertical flight path segment’s construction and resulting configuration is dependent on the configuration of the vertical flight plan segments that precede it. The results also show that for a majority of the test cases, the resulting flight plans computed using the two implementations were identical. Moreover, even when the flight plans were not completely identical, many of the corresponding segments were identical.

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Designing 4-D trajectories for super-dense operations given weather constraints

Cited by 6 publications

References 7 publications

Vertical flight path segments sets for aircraft flight plan prediction and optimisation

Vertical flight path segments sets for aircraft flight plan prediction and optimisation

Strategies to Mitigate Off-Nominal Events in Super Dense Operations

Flight phase and altitude-dependent geometrical vertical flight plan optimization minimizing the total number of vertical plan segments

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