Actuator Mixer Design in Rotary-Wing Mode Based on Convex Optimization Technique for Electric VTOL UAV

Jung, Yeondeuk; Choi, Hyung-Sik

doi:10.5139/jksas.2020.48.9.691

Cited by 1 publication

(2 citation statements)

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“…For instance, when the motor's rotational direction is (RLRL/LRLR), it can be articulated as equation (8), which is a combination of equations ( 1)-( 4). Conversely, when the motor's rotational direction is (RLRL/RLRL), it can be depicted by equation (9), derived from a combination of equations ( 1)-(3), and (7). Lastly, in the case of (RRLL/LLRR), it can be expressed as equation ( 10) by combining equations ( 1)-( 3), and (6) Since any of the above three scenarios represents an under-determined system, multiple solutions may exist.…”

Section: Optimization Using Linear Programmingmentioning

confidence: 99%

“…6,7 Additionally, the convex optimization method was applied to derive the optimal control solution under OEI conditions. [8][9][10] However, to incorporate these solutions into OPPAV's existing control law, changes would have to be made to the architecture of the mixer controller that generates motor commands. Such alterations would escalate the complexity of the control software.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating one engine inoperative conditions in subscale electric vertical take-off and landing aircraft: An in-depth tethered hover test analysis

Kang,

Cho,

Choi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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The direction of propeller rotation in a distributed electric-powered vertical take-off and landing (eVTOL) aircraft significantly influences control forces and induced drag during both helicopter and fixed-wing modes. This study proposes a strategy to determine the most effective rotational direction for each propeller. This approach effectively mitigates one-engine-inoperative (OEI) conditions during helicopter mode for a subscale eVTOL referred to as the optionally piloted personal air vehicle (OPPAV). Moreover, the study developed an optimal control law using the linear programming method, which minimizes the maximum power required for individual motors under OEI conditions. The lowest maximum power was achieved under OEI conditions when both the front and rear propellers in each pod rotated in the same direction. Furthermore, to validate this proposed control law, a tethered hover test was performed using the subscale OPPAV under OEI conditions. Our findings demonstrate that determining the rotational direction of propellers using the newly proposed reconfiguration control method significantly enhances the safety of eVTOL aircraft operating under OEI conditions.

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Section: Optimization Using Linear Programmingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%