Hybrid pose/tension control based on stiffness optimization of cable-driven parallel mechanism in wind tunnel test

2016 ◽  
Author(s):  
Xiaoguang Wang ◽  
Shaoyu Ma ◽  
Qi Lin
Keyword(s):  
Wind Tunnel ◽  
Parallel Mechanism ◽  
Wind Tunnel Test ◽  
Tension Control ◽  
Stiffness Optimization

Workspace analysis and verification of cable-driven parallel mechanism for wind tunnel test

2016 ◽  
Vol 231 (6) ◽  
pp. 1012-1021 ◽  
Author(s):  
Xiaoguang Wang ◽  
Yunbo Hu ◽  
Qi Lin
Keyword(s):  
Wind Tunnel ◽  
Parallel Mechanism ◽  
Aerodynamic Force ◽  
Wind Tunnel Test ◽  
Special Kind ◽  
Parallel Robot ◽  
System Construction ◽  
Vector Projection ◽  
Workspace Analysis ◽  
Projection Strategy

Cable-driven parallel mechanism is a special kind of parallel robot in which traditional rigid links are replaced by actuated cables. This provides a new suspension method for wind tunnel test, in which an aircraft model is driven by a number of parallel cables to fulfil 6-DOF motion. The workspace of such a cable robot is limited due to the geometrical and unilateral force constraints, the investigation of which is important for applications requiring large flight space. This paper focuses on the workspace analysis and verification of a redundant constraint 6-DOF cable-driven parallel suspension system. Based on the system motion and dynamic equations, the geometrical interference (either intersection between two cables or between a cable and the aircraft) and cable tension restraint conditions are constructed and analyzed. The hyperplane vector projection strategy is used to solve the aircraft’s orientation and position workspace. Moreover, software ADAMS is used to check the workspace, and experiments are done on the prototype, which adopts a camera to monitor the actual motion space. In addition, the system construction is designed by using a built-in six-component balance to measure the aerodynamic force. The results of simulation and tests show a good consistency, which means that the restraint conditions and workspace solution strategy are valid and can be used to provide guidance for the cable-driven parallel suspension system’s application in wind tunnel tests.

Analysis about the Work Space of a 3-RPR Parallel Mechanism Based Wind Tunnel Experiment Platform

2015 ◽  
Vol 741 ◽  
pp. 646-650
Author(s):  
Yong Jin Hu ◽  
Wen Jia Chen ◽  
Lu Yang Li ◽  
Jian Zhang ◽  
Zi Yan Shao
Keyword(s):  
Wind Tunnel ◽  
Parallel Mechanism ◽  
Wind Tunnel Test ◽  
Wind Tunnel Experiment ◽  
Work Space ◽  
Experiment Platform ◽  
Test Platform ◽  
Dimensional Parameters ◽  
Position Solution ◽  
The Impact

This paper introduces the characteristics of a 3-RPR parallel mechanism based on the wind tunnel experiment platform, makes use of the constraint condition of the inverse position solution of the structure, and uses MATLAB software to draw images of their work space and analyze the impact of the dimensional parameters of wind tunnel platform on the scope of work space, and it provides a theoretical basis for the design and practical of wind tunnel test platform.

Analysis on Metamorphic of the Cable-Driven Parallel Mechanism in Wind Tunnel Test

2013 ◽  
Vol 336-338 ◽  
pp. 1196-1203
Author(s):  
Qing Lin Chen ◽  
Qi Lin
Keyword(s):  
Wind Tunnel ◽  
Parallel Mechanism ◽  
Wind Tunnel Test ◽  
Kinematics And Dynamics ◽  
High Angle ◽  
High Angle Of Attack ◽  
New Methods ◽  
Methods Of Calculation ◽  
Metamorphic Mechanism ◽  
Metamorphic Mechanisms

The workspace is limited in the fixed parameters of cable-driven parallel mechanism and interference often happens between cables and surfaces of actuator. The fundamental basis of metamorphic mechanisms is addressed in accordance with the design, kinematics and dynamics, as well as the compliant metamorphic mechanisms. Metamorphic structure was applied to the cable-driven parallel mechanism. The more adaptive metamorphic mechanism is the full mobile hinge, which provided whole workspace of the frame. Through adding the adaptive hinge, the workspace was extended. The new methods of distant to detect interference between cables and faces of actuator was discussed and applied to a 6 DOF cable-driven parallel mechanism. Comparing with other methods of calculation of interference, it showed more accurate and provided a function to metamorphic control. The volume of interference was coherent and the force of cable was smoother to control when testing the high angle of attack.

Response and Operational Modal Analysis from Wind Tunnel Test of the EOLO Flexible Aircraft

2021 ◽  
Author(s):  
David F. Castillo Zuñiga ◽  
Alain Giacobini Souza ◽  
Roberto G. da Silva ◽  
Luiz Carlos Sandoval Góes
Keyword(s):  
Wind Tunnel ◽  
Modal Analysis ◽  
Wind Tunnel Test ◽  
Operational Modal Analysis ◽  
Flexible Aircraft

DEVELOPMENT OF A RAPID PROTOTYPING METHODOLOGY FOR WIND TUNNEL TEST MODEL DESIGN

2019 ◽  
Author(s):  
Bruno Ricardo Massucatto Padilha ◽  
Guilherme Barufaldi ◽  
ROBERTO GIL ANNES DA SILVA
Keyword(s):  
Wind Tunnel ◽  
Rapid Prototyping ◽  
Wind Tunnel Test ◽  
Test Model ◽  
Model Design

Rancang Bangun Piranti Lunak Pengolah Data Pasca Pengujian Terowongan Angin Kecepatan Rendah Indonesia

2016 ◽  
Vol 7 (2) ◽  
pp. 131-138
Author(s):  
Ivransa Zuhdi Pane
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Test Results ◽  
Effective Solution ◽  
Post Processing ◽  
Prototype Development ◽  
Design Activities ◽  
Index Terms ◽  
Test Objects ◽  
Processing Requirement

Data post-processing plays important roles in a wind tunnel test, especially in supporting the validation of the test results and further data analysis related to the design activities of the test objects. One effective solution to carry out the data post-processing in an automated productive manner, and thus eliminate the cumbersome conventional manual way, is building a software which is able to execute calculations and have abilities in presenting and analyzing the data in accordance with the post-processing requirement. Through several prototype development cycles, this work attempts to engineer and realize such software to enhance the overall wind tunnel test activities. Index Terms—software engineering, wind tunnel test, data post-processing, prototype, pseudocode

scholarly journals Investigation of the Time Dependence of Wind-Induced Aeroelastic Response on a Scale Model of a High-Rise Building

2021 ◽  
Vol 11 (8) ◽  
pp. 3315
Author(s):  
Fabio Rizzo
Keyword(s):  
Wind Tunnel ◽  
Time Dependence ◽  
Wind Tunnel Test ◽  
Structural Response ◽  
Cumulative Distribution ◽  
Scale Model ◽  
Acquisition Time ◽  
Test Results ◽  
High Rise ◽  
High Rise Building

Experimental wind tunnel test results are affected by acquisition times because extreme pressure peak statistics depend on the length of acquisition records. This is also true for dynamic tests on aeroelastic models where the structural response of the scale model is affected by aerodynamic damping and by random vortex shedding. This paper investigates the acquisition time dependence of linear transformation through singular value decomposition (SVD) and its correlation with floor accelerometric signals acquired during wind tunnel aeroelastic testing of a scale model high-rise building. Particular attention was given to the variability of eigenvectors, singular values and the correlation coefficient for two wind angles and thirteen different wind velocities. The cumulative distribution function of empirical magnitudes was fitted with numerical cumulative density function (CDF). Kolmogorov–Smirnov test results are also discussed.

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