Design and Testing of an Autorotative Payload Delivery System

Brindejonc, Anne; Sirohi, Jayant; Chopra, Inderjit

doi:10.4050/jahs.52.360

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…Dropping the device from only 5 m did not allow the UAV enough time to reach terminal velocity. auto-rotation was observed by Brindejonc [4] when the Autobody was released from a hot air balloon, thus one might expect that the height from which our device was dropped was simply too low in comparison to its size. The device was also not released at its predicted angular velocity due to limited motor torque.…”

Section: Auto-rotationmentioning

confidence: 95%

“…The rotor airfoils and payload were connected using a gimbal hub that allows for the rotor to move freely along its pitch and roll axis. This hub was inspired by the Autobody, created by Brindejonc in [4]. This gimbal hub was designed to increase the stability of the device during flight and ensure the payload hangs vertically even when the rotor system is perturbed by minor air currents.…”

Section: Prototype Design and Constructionmentioning

confidence: 99%

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Towards a novel auto-rotating lidar platform for cavity surveying

Mitchell

Marshall

2020

Tunnelling and Underground Space Technology

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This paper presents the conceptual design, construction, and preliminary testing of a novel auto-rotating platform for cavity surveying. Cavity surveying involves generating a 3D model of an opening from acquired point cloud data. 3D models are used for volume estimation, stope reconciliation, dilution control, convergence monitoring, and rock mass stability analysis. In contrast to conventional cavity monitoring systems (CMS), which employ a rotating light detection and ranging (LiDAR) sensor attached to a stationary boom, the presented novel platform consists of a single point LiDAR sensor attached to an auto-rotating body as a unique solution to the cavity surveying problem. A proof of concept device consisting of a four-blade rotor and a data acquisition system was constructed and dropped from a five-metre overhang. Although auto-rotation was not reached, the set of indoor drop tests provide preliminary results that illustrate the design concept and describes the impact of design parameters.

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Section: Auto-rotationmentioning

confidence: 95%

Section: Prototype Design and Constructionmentioning

confidence: 99%

Towards a novel auto-rotating lidar platform for cavity surveying

Mitchell

Marshall

2020

Tunnelling and Underground Space Technology

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“…Blades with two different profiles were tested, double wedge and elliptical. More recently, a master thesis [14] on an autorotative payload delivery system reports low speed wind tunnel tests on a rotor (with no body underneath) having size similar to the one of the subsonic model tested in the present study. In both cases, tests dealt with single piece blades.…”

Section: Introductionmentioning

confidence: 94%

Aerodynamic assessment of a rotary entry vehicle for Mars landing: an experimental analysis

2019

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A theoretical and experimental study has been undertaken, under ESA contract, by a team including GMV, the University of Bologna and EADS-Astrium, to assess the feasibility of an entry descent and landing (EDL) vehicle based on unpowered rotary decelerator. A deployable rotor with telescopic blades is considered, aimed at replacing all the standard deceleration devices for a descent module (parachutes, airbags, and retrorockets) except for the heat shield, with Mars as the main planetary target.This paper deals with the aerodynamic assessment of the proposed vehicle configuration. The objectives are twofold. First, a proof of concept of the main autorotation related events, viz. blades deployment from folded configuration in supersonic or transonic regime and telescopic blades extension in subsonic regime, is experimentally analyzed. Second, a characterization of the vehicle performances in terms of aerodynamic drag,

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“…This work focused on low-cost and easy manufacturing of the device, lacking trajectory control. Other works have explored using autorotation [2], [16], [17] or samara-inspired designs [18], [19], but none had the element of trajectory or directional control. This likely indicates that research interest in single-winged autorotating devices may be limited, largely due to the many challenges involved in designing a readily autorotating platform and lack of appropriate testing facilities while possible results do not appear very appealing or rewarding.…”

Section: Introductionmentioning

confidence: 99%

An Agile Samara-Inspired Single-Actuator Aerial Robot Capable of Autorotation and Diving

Win

Sufiyan

et al. 2022

IEEE Trans. Robot.

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Large scale aerial deployment of miniature sensors in tough environmental conditions requires a deployment device that is lightweight, robust, and steerable. We present a novel samarainspired autorotating craft that is capable of two flight modes (autorotating mode and diving mode) with an average glide angle of 28.9 • (1.81 m lateral distance per 1 m loss of altitude) in the former mode. The bidirectional transition between the two modes and directional control is achieved by using only a single actuator. Also, in order to minimize its glide angle, a design optimization methodology is presented for our prototype, diving samara autorotating wing, along with a new cyclic control strategy for directional control of autorotating descent. The dynamic model, simulated in a six degrees-of-freedom environment using the blade element theory, is integrated with genetic algorithm to derive parameters for the wing geometry, flap angle for autorotation, and the proposed cyclic control. The physical prototype autorotates at a descent velocity of 1.43 m/s and rotation speed 4.17 Hz, and is able to transit to diving mode in an average duration of 272 ms to increase its descent velocity by at least 17.6 times. At any point during the dive, it is able to transit back into autorotation in an average duration of 327 ms. Semioutdoor experiments were used to investigate the bidirectional transitions and verify the glide angle (28.9 • ), which is much improved from the previous prototype (SAW+, 58.4 • ). Lastly, as a demonstration of a real-life deployment scenario and environmental conditions, the prototypes were dropped from a fixed-wing unmanned aerial vehicle at a suburban test site.

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Design and Testing of an Autorotative Payload Delivery System

Cited by 10 publications

References 5 publications

Towards a novel auto-rotating lidar platform for cavity surveying

Towards a novel auto-rotating lidar platform for cavity surveying

Aerodynamic assessment of a rotary entry vehicle for Mars landing: an experimental analysis

An Agile Samara-Inspired Single-Actuator Aerial Robot Capable of Autorotation and Diving

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