Performance and stability of a ducted-fan uninhabited aerial vehicle

Avanzini, Giulio; D’Angelo, Salvatore; Matteis, G. De

doi:10.2514/6.2001-844

Cited by 6 publications

(7 citation statements)

References 1 publication

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“…This vehicle is similar in shape to that studied in Ref. 1 and is the results of a project jointly accomplished from the University of Rome "La Sapienza" 2 and the Polytechnic of Turin 1 . The fuselage geometry is the result of a parametric study which analyzed the lift capability of different toroidal geometries in the presence of the rotor flow.…”

Section: Introductionmentioning

confidence: 70%

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Performance and Stability Analysis of a Shrouded-Fan Unmanned Aerial Vehicle

Divitiis

2006

Journal of Aircraft

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This paper deals with the estimation of the performance and stability for a shrouded-fan unmanned rotorcraft whose mission profile also prescribes the flight in ground effect. The not so simple estimation of the aerodynamic coefficients and of the thrust in the various situations makes the performance calculation and the stability analysis difficult tasks. This is due to the strong interaction between the fan flow and shroud that causes quite different flow structures about the airframe depending on flight conditions. A further difficulty is related to the ground effect which produces substantial modifications in the rotor thrust and aerodynamic coefficients. To evaluate performance and stability, two models have been developed. One determines the aerodynamic coefficients of the shroud, whereas the other one calculates thrust and moment of the rotors system. Both models take into account the mutual interference between fan flow and fuselage and ground effect. Performance and stability are then discussed with reference to significant flight conditions. Nomenclature

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Section: Introductionmentioning

confidence: 70%

“…This vehicle is similar in shape to that studied in Ref. 1 and is the results of a project jointly accomplished from the University of Rome "La Sapienza" 2 and the Polytechnic of For what concerns the ground proximity, it is responsible for several effects. One of these is represented by the fuselage aerodynamic coefficients variations which occur in hovering.…”

mentioning

confidence: 72%

Performance and Stability Analysis of a Shrouded-Fan Unmanned Aerial Vehicle

Divitiis

2006

Journal of Aircraft

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“…The airflow around the duct is asymmetric so that there must be pressure difference around the duct which is the moment drag which have to turn the airstream downward to flow along the axis of the vehicle. And the drag is [7] [8] .…”

Section: Gxmentioning

confidence: 99%

Robust Model for the Design of Controller in Saucer UAV

Wang¹,

Ai²,

Dai³

et al. 2010

JSW

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The saucer UAV (Unmanned Aerial Vehicle) features both helicopter and traditional fixed-wing airplane, is capable of hovering, takeoff and landing vertically. The configuration of the UAV in this paper which is comprised of a propeller and there pairs of control vanes enclosed in the duct is new-style aircraft. In order to research the attitude control of the saucer UAV, this paper mainly focuses on the dynamic analysis and control model design of the vehicle. The dynamics of all the components of the UAV configuration is analyzed respectively first and then the complete nonlinear model is constructed from the forces and moments analysis of the vehicle. The model is simplified in the flight node of hovering. After that a robust model is designed to handle the parameter uncertainty and disturbance while in the hovering condition, and the simulation results are presented at last. Simulated results show the controller designed can guarantee the saucer UAV has good stable feature for operation and certain robustness.

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“…2 shows the aerodynamic pitch moment of the shroud con®guration in forward horizontal¯ight as a function of trim speed, computed using a boundary element code including a wake-relaxation iterative scheme and boundary layer analysis. Details on the adopted method for realization of the aerodynamic database as well as on vehicle modelling are reported by Avanzini et al [8], where a slightly different, preliminary shape of shroud was dealt with. Pitch moment trend in the ®gure, where a maximum value is observed at a velocity of 20 m/s with sharp decrement at higher speeds, is in close agreement with the result presented by Thornberg and Cycon [7] for Cypher con®guration.…”

Section: Rotor Systemmentioning

confidence: 99%

“…In universities, the enclosed rotor concept led to construction of a shrouded-propulsors, single-rotor traf®c surveillance drone at Georgia Institute of Technology. The shrouded-fan con®guration presents some peculiar characteristics in terms of dynamic behaviour, described in some detail by Avanzini et al [8].…”

Section: Introductionmentioning

confidence: 96%

Design and development of a vertical take-off and landing uninhabited aerial vehicle

Avanzini

D’Angelo

Matteis

2003

Proceedings of the Institution of Mechanical Engineers, Part G:

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Using of aerial vehicles with onboard sensory and broadcasting apparatus for monitoring a variety of objects and processes in inaccessible places of the city. A hardware and software package for the task solving is proposed in the article. Presented vehicle is a vertical takeoff and landing airplane of tail-sitter type. МАЛОГАБАРИТНЫЙ ЛЕТАТЕЛЬНЫЙ АППАРАТ ВЕРТИКАЛЬНОГО ВЗЛЕТА И ПОСАДКИ ДЛЯ ЗАДАЧ МОНИТОРИНГА В УСЛОВИЯХ ПЛОТНОЙ ГОРОДСКОЙ ЗАСТРОЙКИ Аннотация. Мониторинг ряда городских объектов и процессов, расположенных в труднодоступных местах, возможен с помощью летательных аппаратов с бортовыми сенсорными и транслирующими средствами. Аппаратный и программный комплекс для решения задачи предложен в этой статье. Представленный аппарат является самолетом вертикального взлета и посадки типа tail-sitter.

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Performance and stability of a ducted-fan uninhabited aerial vehicle

Cited by 6 publications

References 1 publication

Performance and Stability Analysis of a Shrouded-Fan Unmanned Aerial Vehicle

Performance and Stability Analysis of a Shrouded-Fan Unmanned Aerial Vehicle

Robust Model for the Design of Controller in Saucer UAV

Design and development of a vertical take-off and landing uninhabited aerial vehicle

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