Minimum-Exposure Near-Terrain Flight Trajectories for Rotorcraft

Menon, P. K.; Cheng, Victor H. L.

doi:10.1016/b978-0-12-012752-8.50014-3

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…An over-bar denotes nominal values. Differentiating the expressions (18) and (19) twice with respect to time leads to the perturbed equations of motion:…”

Section: Closed-loop Guidance Law For Conflict Resolutionmentioning

confidence: 99%

Optimal Strategies for Free-Flight Air Traffic Conflict Resolution

Menon

Sweriduk

Sridhar

1999

Journal of Guidance, Control, and Dynamics

204

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Recent advances in navigation and data communication technologies make it feasible for individual aircraft to plan and fly their trajectories in the presence of other aircraft in the airspace. This way, individual aircraft can take advantage of the atmospheric and traffic conditions to optimally plan their paths. This capability is termed as the free flight concept. While the free flight concept provides new degrees of freedom to the aircraft operators, it also brings-in complexities not present in the current air traffic control system. In the free flight concept, each aircraft has the responsibility for navigating around other aircraft in the airspace. While this is not a difficult task under low speed, low traffic density conditions, the complexities of dealing with potential conflict with multiple aircraft can significantly increase the pilot's work load. This paper presents the development of a conflict resolution algorithm based on the quasilinearization method to enable the practical implementation of the free flight concept. The algorithm development uses nonlinear point-mass aircraft models, and incorporates realistic operational constraints on individual aircraft. The analytical framework can also incorporate information about ambient atmospheric conditions. Realistic conflict resolution scenarios are illustrated. Due to their speed of execution, these conflict resolution algorithms are suitable for implementation on-board aircraft.

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“…An over-bar denotes nominal values. Differentiating the expressions (18) and (19) twice with respect to time leads to the perturbed equations of motion:…”

Section: Closed-loop Guidance Law For Conflict Resolutionmentioning

confidence: 99%

Optimal Strategies for Free-Flight Air Traffic Conflict Resolution

Menon

Sweriduk

Sridhar

1999

Journal of Guidance, Control, and Dynamics

204

View full text Add to dashboard Cite

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Optimal aircraft terrain-following analysis and trajectory generation

Lu¹,

Pierson²

1995

20th Atmospheric Flight Mechanics Conference

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Technologies for Automating Rotorcraft Nap‐of‐the‐Earth Flight

Cheng

Sridhar

1993

j am helicopter soc

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This paper reviews the technologies required for automating ratoreraft nap-of-the-earlh flight, where the use of natural obstacles for maskine from lhc encmv is intentional and the daneer of undcsirshle obstacles such as cncm?. lrapi i\ rwal. Specificall), thu a~otu~nclir ~uida~~turlruelt~ru is modrlcd I,? thrrr dcri\iun-msking Icvelc: the hr-ncld rniwi8,n plilnniny 2nd the illill-field t~rriaiu-milsking Irdi~ctor) m ha pine are b0111 driven hv st,#rcdterrain data, whereas thc near-field obstacle deteetion/avoidanee is drivan by real-time, an-board sensor data. This paper summarizes thc far-field and mid-field accomplishments, and reports on the status of recent efforls in obslaclc detection and avoidance development. Obstacle detection is based primarily on passive imaging sensors for thc desirable properties of covertness and wide field of view, although active sensors are included in thc slructure to provide the needed high resolution far thin-wire detection. An extensive list of references, though not exhaustive, is provided. S~~n t /~o r i~~~n ofthe Czridnnce orldCo,ztrol I'o,>el 093 Air Velzicle Mlssiof~ Cottoul rind Ma,mgennertt, Amsterdam, The Netherlands, Oct 1991, pp. stacles in real time to perform avoidance and masking maneu-10.1-10-12, vers. Two optimization techniques havc been developed to '~eutsch. O.L.. Desai, M.. and McCee, L.A., "Far-field Mission Planfulfill the mission-planning objective of the far-field function. ning for Nap.of.lhe.Eanh Flight,m-Placeedi,,gr nfrheA,,s Nafior,nl Spe.The most mature mid-field guidance technique is based on a ~i~l i~t~' ~l i~h r co,,trol ~, , d A V~O ,~~C S , Cherry Hill. NJ, Oct terrain-followinglterrain-avoidance concept which performs a 1987.

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Minimum-Exposure Near-Terrain Flight Trajectories for Rotorcraft

Cited by 3 publications

References 25 publications

Optimal Strategies for Free-Flight Air Traffic Conflict Resolution

Optimal Strategies for Free-Flight Air Traffic Conflict Resolution

Optimal aircraft terrain-following analysis and trajectory generation

Technologies for Automating Rotorcraft Nap‐of‐the‐Earth Flight

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