Design and Optimization of a Bennett–Spherical Scissor Mechanism Suitable for Driving Aerial–Aquatic Rotor Deformation DOI Creative Commons

Chengrong Du,

Dongbiao Zhao

Actuators, Journal Year: 2024, Volume and Issue: 13(8), P. 318 - 318

Published: Aug. 21, 2024

This paper aims to design a deformable mechanism drive amphibious rotor blade deform from an aerial shape aquatic one. The Bennett four-bar and spherical mechanisms are used as the basic units (B unit S unit) form Bennett–spherical spatial scissor (BS unit). By analyzing kinematic characteristics of BS unit, it is found that can achieve deformation expansion torsion, effectively improving rotor’s performance in water air media. wing rib support structure, which fixed linkage, designed. coordinate transformation method describes modes using parameters. To improve water, carried out under NSGA-II framework with parameters variables. Gaussian regression CFD methods applied build surrogate model reduce computational cost. results show expansion–torsional increase compatibility blades. When shape, extends decreases torsion lift efficiency. deformed reduces its length increases torque effectively. be

Language: Английский

Solving a Multi-Objective Optimization Problem of a Two-Stage Helical Gearbox with Second-Stage Double Gear Sets Using the MAIRCA Method DOI Creative Commons

Duc-Binh Vu,

Tran Huu Danh,

Van-Thanh Dinh

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(12), P. 5274 - 5274

Published: June 18, 2024

This paper provides a novel application of the multi-criteria decision-making (MCDM) method to multi-objective optimization problem (MOOP) creating two-stage helical gearbox (TSHG) with second-stage double gear sets (SDGSs). The aim study is determine optimum major design components for enhancing efficiency while reducing volume. In this work, three primary parameters are chosen accomplish this: ratio first stage and coefficients wheel face width (CWFW) second stages. Additionally, conducted two distinct objectives in mind: lowest volume maximum efficiency. Moreover, phase 1 2, respectively, stages MOOP. Phase 2 handles MOOP identify ideal factors as well single-objective minimize difference between variable levels. Multi-Attributive Ideal–Real Comparative Analysis (MAIRCA) approach selected deal results utilized values crucial order create TSHG SDGSs.

Language: Английский

Citations

1
Optimization of commercial vehicle cab structure design based on mixed sensitivity analysis DOI

Jingkui Ruan,

G.Y. Li,

Weizhen Ruan

et al.

Published: Aug. 9, 2024

In order to improve the lightweight optimization effect of commercial vehicles, a certain flat-head vehicle cab is used as research object establish geometric model cab. Through stiffness calculation, bending deformation longitudinal beam and calculation windshield door frame Deformation analysis evaluate performance model. A free modal carried out, with Z-direction displacement under conditions first-order torsional natural frequency not being less than initial value constraints, minimum weight objectives. The 16 selected products were screened by relative sensitivity analysis. thickness variables are optimized for design, NSGAII genetic algorithm multi-objective optimization, solution that meets various requirements has smaller quality solution. results show while reduced 13kg, significantly improved, reduction rate 3.44%, significant.

Language: Английский

Citations

0
Design and Optimization of a Bennett–Spherical Scissor Mechanism Suitable for Driving Aerial–Aquatic Rotor Deformation DOI Creative Commons

Chengrong Du,

Dongbiao Zhao

Actuators, Journal Year: 2024, Volume and Issue: 13(8), P. 318 - 318

Published: Aug. 21, 2024

This paper aims to design a deformable mechanism drive amphibious rotor blade deform from an aerial shape aquatic one. The Bennett four-bar and spherical mechanisms are used as the basic units (B unit S unit) form Bennett–spherical spatial scissor (BS unit). By analyzing kinematic characteristics of BS unit, it is found that can achieve deformation expansion torsion, effectively improving rotor’s performance in water air media. wing rib support structure, which fixed linkage, designed. coordinate transformation method describes modes using parameters. To improve water, carried out under NSGA-II framework with parameters variables. Gaussian regression CFD methods applied build surrogate model reduce computational cost. results show expansion–torsional increase compatibility blades. When shape, extends decreases torsion lift efficiency. deformed reduces its length increases torque effectively. be

Language: Английский

Citations

0