Enhanced UAV propulsion system

Gebauer, Jan; Wagnerova, Renata

doi:10.1109/carpathiancc.2017.7970379

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…Large scale: actual approaches of MM-UAV are not feasible in large scale aircrafts, for example, researchers that change the direction of rotation of the propellers for faster control of orientation, must deal with the counterpart in big scale UAVs where this change is slow and dangerous. The approach of tilting the entire body of a propeller and its corresponding motor is also not feasible, because the required engine capable of moving a rotating propeller, demand too much power, because they work against considerable gyroscopic and inertial effects In this way is needed to develop snake aerial manipulators focused on turbine thrust vectoring methods (in fact, the propeller technology becomes oversized) or work in new ways for varying the angle of attack of the propellers with swashplates or another methods including non-mechanical [126]- [128], of course, if it is even possible to use propellers.…”

Section: Design Considerations Of Energy and Powermentioning

confidence: 99%

Snake Aerial Manipulators: A Review

et al. 2020

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In this document, a review about snake aerial manipulators is presented. The most common mechatronical implications found in their design are described. The text is presented to the reader as a set of modules, this include topics about structural dynamics, aerodynamics, power and energy, propulsion, thrust-vectoring and level of autonomy of aircrafts, also highlights about use of sensors, control methods and flight schemes. INDEX TERMS Aerial manipulator, cooperative systems, UAS. I. INTRODUCTIONTo follow it is convenient to expose a brief introduction to coupled and decoupled task aerial manipulation concepts. Which are the basis of snake aerial manipulators. Both concepts are widely described in [1]-[5]. A. AERIAL MANIPULATION OF DECOUPLED AND COUPLED TASKS II. MECHANICAL CONSIDERATIONS, POWER AND AERODYNAMICS A. COMMON COMPONENTSGuiding element, base element, reference element or branching element: All these are synonymous and they are defined as a reference point from which at least 2 arms, also called kinematic chains, fork.Kinematic chain: successive union of engine elements (multicopters, individual propellers and/or motors) with elements of transmission or propagation of movement (bar linkages), by using connecting elements (joints or the motors by themselves).Engine elements: they are the multicopter aircraft or individual propellers which, in addition to allowing the hovering and flight of the whole system, produce the rotational movements necessary to transmit and propagate to more complex movements through the kinematic chains with or without the assistance of auxiliary motors. Table.2 TABLE 2. Kinds of engines for snake aerial manipulators.Elements of transmission or propagation: they are bar linkages that connect one drone to other or one propeller to other and allow the chained transmission of their rotations and translations Joint elements: the driving elements with the linkages are connected through joints. They allow the general mobility and the propagation or suppression of one or more relative movements. They could be any type of bearing, for example standard bearings, ball-joints (which particularly allows three-dimensional mobility), rigid bearings (like bronze bushings), restricted rotation bearings (that have no free rotation of yaw movement as a cardan joint or a locked ball-joint), magnetic joints, clutches (they allow a variable type connection), or even auxiliary motors by themselves according to the usage and design Damping elements: they are used to control or suppress unwanted movements such as bumps, and vibration or misalignment between the driving elements, the transmission elements and the joints. Examples are rubber shock-absorbers or flexible couplings Power elements: they allow the aircraft and the auxiliary engine elements to be energized. Examples are batteries, electrical extension cords, power cells, solar cells etc.

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Section: Design Considerations Of Energy and Powermentioning

confidence: 99%

Snake Aerial Manipulators: A Review

et al. 2020

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“…The pitch actuator is also included. The detailed explanation of all blocks could be found in [4]. Fig.…”

Section: Combination Of Previous Formulas (1) (2) (3) Is In Equatiomentioning

confidence: 99%

“…3. The airfoil parameters and detailed propeller blade simulation is described in [4], [5], [6]. Thrust T and torque Mz depends on pitch angle α and propeller speed ω.…”

Section: Introductionmentioning

confidence: 99%

Variable Pitch Propulsion Drive Model

Gebauer¹,

Wagnerova²

2017

TransVSBms

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The contribution deals with the mathematical model of the propeller drive unit with variable pitch. The introductory part of the article aims at a general mathematical description of the internal structure of the aircraft propulsion. The DC motor and propeller model are presented in next chapter. The last part presents the comparison between MatLab Simulink model and experimental laboratory stand of variable pitch drive unit. Variable pitch propeller drive is useful to minimize power consumption. The use of these units for the drones is only experimental in terms of optimization of energy consumption. Abstrakt V tomto článku je popsán matematický model vrtulové pohonné jednotky s variabilním úhlem náběhu vrtulových listů (VPPU). V úvodní části článku je popsán základní matematický model celé pohonné jednotky. V další části je popsán model motoru ve vazbě s vrtulí. V závěru článku je prezentován výstup simulací v MatLab Simulink v porovnání s výstupy s laboratorního standu. Význam VPPU je v možné úspoře energie letounu. Využití těchto jednotek pro pohon dronů za účelem snižování spotřeby energie je v současnosti jen na experimentální úrovni.

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