Further Improvements in the SNUF Blade Design by Numerical Design Optimization Framework

Eun, WonJong; Sim, JiSoo; Lee, Sang‐Woo; Shin, SangJoon

doi:10.1061/(asce)as.1943-5525.0000794

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…An asymptotically exact cross-sectional analysis is performed using VABS and PreVABS. The cross-sectional design optimization framework used in this study was initially developed in previous studies [27][28][29]. The spar structure is modified to readily incorporate the flap drive shaft bearing in the prototype blade.…”

Section: Mach-scale Seoul National University Flap Rotor Analysismentioning

confidence: 99%

Investigation of Linear Higher Harmonic Control Algorithm for Rotorcraft Vibration Reduction

Lee

Kee

et al. 2020

Journal of Dynamic Systems, Measurement, and Control

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A linear quadratic Gaussian controller for active vibratory loads reduction in helicopters is proposed based on a revisited higher harmonic control input by active trailing-edge flaps. Conventional individual blade control input is redefined using N-1/rev inter-blade phase lead, N/rev collective, and N+1/rev inter-blade phase lag signals where 1/rev frequency modulation originate from the multi-blade coordinate transform. A Mach-scaled flap blade is designed and analyzed by the multi-body dynamics analysis DYMORE. A linear time-invariant representation is identified from N/rev envelopes of the input and output responses obtained by DYMORE analysis. A MATLAB/Simulink closed-loop control simulation is designed using the identified state-space realization. The N/rev vibratory loads are reduced up to 52% with flap deflections and the linear control results match well with the nonlinear responses obtained from DYMORE. Furthermore, the multi-variable closed-loop stability estimated by the loop transfer functions using disk margin analysis reveals sufficient gain and phase margins.

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Section: Mach-scale Seoul National University Flap Rotor Analysismentioning

confidence: 99%

Investigation of Linear Higher Harmonic Control Algorithm for Rotorcraft Vibration Reduction

Lee

Kee

et al. 2020

Journal of Dynamic Systems, Measurement, and Control

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“…With regard to the sectional design of a blade, many studies have been conducted on helicopters and aeronautical engineering applications. Eun et al (2018) suggested a design optimization procedure for the blade section to improve the existing cross-sectional design. Lim, Shin, and Kee (2016) developed a rotor optimization framework for a coaxial compound rotorcraft with a lift offset through a multi-level optimization approach.…”

Section: Introductionmentioning

confidence: 99%

Structural design optimization of a wind turbine blade using the genetic algorithm

Lee

Shin

2021

Engineering Optimization

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With the increasing size of wind turbines in terms of their dimensions and capacity, structural design optimization for their blades is becoming all the more important. This study suggests an improved optimization framework. Blade optimization is performed in two stages: the ply lay-up pattern of the spar cap in the initial blade configuration based on the existing configuration, followed by the cross-sectional design optimization at several spanwise locations. The genetic algorithm is adopted and, in terms of the structural integrity evaluation, the final configuration results are found to be safe; in addition, the number of plies in the spar cap rapidly decreases through the two-stage design optimization procedure. As a result, the blade is lighter, and the lighter blade also reduces the applied load on the wind turbine. This will have an excellent effect that leads to a reduction in the weight of the entire turbine system.

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Surrogate Model-Based Parametric Structural Design of a Composite Tiltrotor Blade

Sun

Jiang

Shen

et al. 2022

Lecture Notes in Electrical Engineering

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Further Improvements in the SNUF Blade Design by Numerical Design Optimization Framework

Cited by 4 publications

References 15 publications

Investigation of Linear Higher Harmonic Control Algorithm for Rotorcraft Vibration Reduction

Investigation of Linear Higher Harmonic Control Algorithm for Rotorcraft Vibration Reduction

Structural design optimization of a wind turbine blade using the genetic algorithm

Surrogate Model-Based Parametric Structural Design of a Composite Tiltrotor Blade

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