Factors Shaping Conceptual Design of Rotary‐Wing Aircraft

Stępniewski, W. Z.

doi:10.4050/jahs.27.6

Cited by 5 publications

(1 citation statement)

References 7 publications

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“… where X¨e, Y¨e and Z¨e are the accelerations with respect to the earth-fixed frame, and Fi is the drag force acting on the quadrotor on the ith axis, due to the relative velocity of wind, where i=Xo,Yo,Zo and is derived in the following section. The force and moment 13 generated due to the propeller rotation can be obtained as where b=ρAR2Ct and k=ρAR3Cq. ρ is the density of air, A is the area of the propeller disk, R is the radius of the propeller, and Cq and …”

Section: Mathematical Modelmentioning

confidence: 99%

Performance analysis of vertically offset overlapped propulsion system based quadrotor in an aerial mapping mission

Nandakumar

Saphal

Joishy

et al. 2018

International Journal of Micro Air Vehicles

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In this paper, the authors present the performance analysis of a Vertically Offset Overlapped Propulsion System (VOOPS)-based quadrotor in an aerial mapping mission. The dynamic model of the VOOPS quadrotor with the effect of overlapping propellers and the profile drag has been derived and simulated. A path-tracking mission is taken as an example for aerial survey. The controller used for this task is presented, followed by the response study of the attitude and the position controller with standard test inputs. A graphical interface has been built to select the area to be mapped by defining a polygon around it, and waypoints for lawnmower type survey grid were generated based on the direction of wind. The path-tracking algorithm is presented along with course correction and simulations were performed with both conventional and VOOPS quadrotor. An experimental vehicle based on the proposed VOOPS concept has been built, tested on the same path, and the results are discussed. The results show that the VOOPS quadrotor is capable of performing the aerial mapping mission with quick response and good accuracy.

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Section: Mathematical Modelmentioning

confidence: 99%

Performance analysis of vertically offset overlapped propulsion system based quadrotor in an aerial mapping mission

Nandakumar

Saphal

Joishy

et al. 2018

International Journal of Micro Air Vehicles

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Efficient sizing of a cargo rotorcraft

Meier

Olson

1988

Journal of Aircraft

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A new cargo rotorcraft sized to meet the most demanding of the future combat airlift requirements being postulated by the U. S. Army could be unnecessarily large and expensive. Overall requirements could be satisfied more efficiently with a smaller aircraft by using multilift for infrequent peak demands. This paper describes a methodology for assessing the benefit of multilift and the influence of usage spectrum on required aircraft size and achievable overall productivity. For characteristic distributions of mission payload, radius of action, and ambients, it is shown that aircraft design gross weight could be reduced as much as 40% and overall productivity improved as much as 50% by using multilift for less than 5% of the missions.

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