NOCTARN: Trajectory based CNS/ATM concept for small aircraft

Funabiki, Kohei; Muraoka, Koji; Iijima, Tomoko; Shiomi, Kenta

doi:10.1109/dasc.2002.1052962

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…The average values of the wind velocity components are calculated in one step and substituted for Eqs. (1) and (2) in the motion equations in the next step. By repeating this process, the averaged wind effect is incorporated with the update T -second delay.…”

Section: Journal Of Mechanical Systems For Transportation and Logisticsmentioning

confidence: 99%

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Real-Time Trajectory Optimization for Noise Abatement of Helicopter Landings

Tsuchiya

Ikaida

Ishii

et al. 2011

JMTL

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In this study, an optimization method is developed to reduce the ground noise impact of helicopter approach flights, and flight experiments are conducted to confirm the effectiveness of this optimization. First, we build a noise model of the JAXA (Japan Aerospace Exploration Agency) experimental helicopter based on measurement results. Then, we define optimal control problems to minimize the noise levels measured at points on the ground surface. The main objective of this paper is to propose a real-time flight trajectory optimization method for solving the optimization problems using actual flight conditions with an on-board computer. To validate the effect of the proposed method, some numerical simulations are conducted under real flight experiment scenarios. The obtained optimal solutions are characterized by steep flight path angles so as to avoid the flight conditions that generate large noise, avoidance of the measurement points, and short flight times; these optimal flights are different from conventional flight trajectories. Finally, the validity of the proposed optimization method is examined by means of flight experiments with the experimental JAXA helicopter. The actual flight experiments result in noise reduction, and prove the effectiveness of the optimization.

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Section: Journal Of Mechanical Systems For Transportation and Logisticsmentioning

confidence: 99%

“…Additionally, the more unfamiliar the pilots are with the landscape, the higher the possibility of excess noise pollution. It has been suggested the noise impact be minimized by its dispersion over areas that are tolerant of noise such as industrial zones, rivers, forests and highways using a precision approach system (1) .…”

Section: Introductionmentioning

confidence: 99%

Real-Time Trajectory Optimization for Noise Abatement of Helicopter Landings

Tsuchiya

Ikaida

Ishii

et al. 2011

JMTL

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“…Since 1997, the National Aerospace Laboratory of Japan (NAL) has been conducting experimental studies on on-board precision approach technologies to enable aircraft to c a w out such flexible approaches, using hybrid DGPS-INS (Differential Global Positioning SystedInertial Navigation System) navigation systems and tunnel-in-the-sky flight guidance displays [I]. Based on the results of these studies, NAL and the Electronic Navigation Research Institute (ENRI) have initiated a new research program called NOCTARN (New Operational Concept using Three-dimensional Adaptable Route Navigation) aimed at developing an aircraft operations concept that can reduce the noise impact on communities while enhancing the capacity and operational efficiency of airports, focusing on regional airports and small aircraft and helicopters, by using precisely-defined trajectories which are shared between aircraft and ground [2]. Because the proposed operational concept requires pilots to fly along curved trajectories while communicating by CPDLC (Controller Pilot Data Link Communication), and differs from both conventional VFR (Visual Flight Rules) and IFR (Instrumental Flight Rules) procedures, considerable attention bas been paid to the system design and evaluation of the pilot HMI (Human Machine Interface) and procedures.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a trajectory-based operations concept for small aircraft: airborne aspect

Funabiki¹,

Iijima²,

Nojima³

2003

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

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The National Aerospace Laboratory of Japan (NAL) and the Electronic Navigation Research Institute (ENRI) are researching a new aircraft operations concept, named NOCTARN, based on three-dimensional flight trajectories shared between aircraft and air traffic control (ATC) via digital data link and negotiated using Control Pilot Data Link Communications (CPDLC). It is proposed to incorporate a route modification function that would be invoked each time a route were assigned to modify the predefined trajectory based on wind conditions and aircraft performance in order to improve path tracking in strong wind while avoiding requiring maneuvers that could lead to loss of control. Route modification could also be used to assure separation between aircraft. This paper reports on the investigation by flight simulation into pilot acceptance of the NOCTARN system, the effects of route modification based on wind conditions and CPDLC operation upon manual flight control performance and pilot workload. The results indicate that modified routes successfully reduced path deviation and lowered pilot workload, and that the introduction of CPDLC procedures had no significant impact on manual flight control. Flight experiments further demonstrated that the proposed system and procedure is acceptable to the pilots.

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“…In addition, the more the pilots are unfamiliar with the landscape, the higher is the possibility of excessive noise pollution. Therefore, it is necessary to minimize the damage by dispersing the noise over more tolerant areas, such as industrial areas, rivers, forests, and highways, using a precision approach system (1) .…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Real-Time Trajectory Optimization for Helicopter Noise Abatement

Ikaida

Tsuchiya

Ishii

et al. 2010

JMTL

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This study was an attempt to obtain optimal landing approaches for helicopters to reduce ground noise impact. Simulations and real flight tests in our previous study confirmed that flights along pre-calculated optimal trajectories resulted in lower noise levels than flights along conventional approach paths. However, some experiments did not show the expected optimization effects because of unforeseen disturbances. This paper therefore improves the algorithms in order to realize practical real-time optimization, which can involve external disturbances. To validate the effect of the new method, various computer simulations were conducted under real flight experimental scenarios. The obtained optimal solutions were characterized by steep flight path angles, which can avoid the generation of loud noise, the avoidance of noise sensitive points, and short flight times. These are different from conventional landing approaches. The optimal trajectories resulted in noise reduction on the ground, which shows the effectiveness and potential of the proposed real-time trajectory optimization method.

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NOCTARN: Trajectory based CNS/ATM concept for small aircraft

Cited by 9 publications

References 3 publications

Real-Time Trajectory Optimization for Noise Abatement of Helicopter Landings

Real-Time Trajectory Optimization for Noise Abatement of Helicopter Landings

Evaluation of a trajectory-based operations concept for small aircraft: airborne aspect

Numerical Simulation of Real-Time Trajectory Optimization for Helicopter Noise Abatement

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