A new approach for handling body motion by combining a grid deformation method and an overset grids technique

2020 ◽  
Vol 213 ◽  
pp. 107836 ◽  
Author(s):  
Kunihide Ohashi
Keyword(s):  
Body Motion ◽  
Deformation Method ◽  
New Approach ◽  
Overset Grids ◽  
Grid Deformation ◽  
Grid Deformation Method

Numerical analysis and implementational aspects of a new multilevel grid deformation method

2010 ◽  
Vol 60 (8) ◽  
pp. 767-781 ◽  
Author(s):  
Matthias Grajewski ◽  
Michael Köster ◽  
Stefan Turek
Keyword(s):  
Numerical Analysis ◽  
Deformation Method ◽  
Grid Deformation ◽  
Grid Deformation Method

scholarly journals Mathematical and Numerical Analysis of a Robust and Efficient Grid Deformation Method in the Finite Element Context

2009 ◽  
Vol 31 (2) ◽  
pp. 1539-1557 ◽  
Author(s):  
Matthias Grajewski ◽  
Michael Köster ◽  
Stefan Turek
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Deformation Method ◽  
Grid Deformation ◽  
Grid Deformation Method

Study on 2D Control Surface flutter by Unstructured grid deformation method

2004 ◽  
Vol 2004.7 (0) ◽  
pp. 81-82
Author(s):  
Akira TSURUMAKI ◽  
Koji MIYAJI
Keyword(s):  
Unstructured Grid ◽  
Control Surface ◽  
Deformation Method ◽  
Grid Deformation ◽  
Grid Deformation Method

Parallelized Aeroelastic Investigation Based on Delaunay Graph Mapping

2013 ◽  
Vol 444-445 ◽  
pp. 227-232
Author(s):  
Rui Jun Fan ◽  
Hong Chao Gao ◽  
Zhou Zhou
Keyword(s):  
Standard Model ◽  
Parallel Computation ◽  
Dynamic Equation ◽  
Unstructured Grids ◽  
Comparison Analysis ◽  
Deformation Method ◽  
Grid Deformation ◽  
Structure Dynamic ◽  
The Standard Model ◽  
Graph Mapping

In this paper, an effective and well robust dynamic grid deformation method based on Delaunay graph mapping is developed to solve the deformation of the 3-D hybrid multiblocks grids which is combined by near-wall viscosity grids and unstructured grids. Further more, the static aeroelastics problems of the standard model M6 elastic wing is investigated altogether by coupled with structure dynamic equation. The comparison, analysis and investigation were done as well. The CFD grids domain is subdivided into subdomains for parallel computation. And the program is carried out by MPI parallel computation standards.

scholarly journals Multi-modal intelligent seizure acquisition (MISA) system — A new approach towards seizure detection based on full body motion measures

2009 ◽  
Author(s):  
I. Conradsen ◽  
S. Beniczky ◽  
P. Wolf ◽  
D. Terney ◽  
T. Sams ◽  
...  
Keyword(s):  
Seizure Detection ◽  
Body Motion ◽  
New Approach ◽  
Full Body

A new approach to the solution of free rigid body motion for attitude maneuvers

2013 ◽  
Author(s):  
Daniele Pagnozzi ◽  
Craig Maclean ◽  
James D. Biggs
Keyword(s):  
Rigid Body ◽  
Rigid Body Motion ◽  
Body Motion ◽  
New Approach ◽  
Free Rigid Body

Fuel efficiency optimization of high-aspect-ratio aircraft via variable camber technology considering aeroelasticity

2020 ◽  
pp. 095441002095996
Author(s):  
Liqiang Guo ◽  
Jun Tao ◽  
Cong Wang ◽  
Miao Zhang ◽  
Gang Sun
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Fuel Efficiency ◽  
Free Form ◽  
Deformation Method ◽  
Grid Deformation ◽  
Computational Structural Dynamics ◽  
Control Matrix ◽  
Nonlinear Static ◽  
Original Configuration

In this study, variable camber technology is applied to improve the fuel efficiency of high-aspect-ratio aircraft with aeroelasticity considered. The nonlinear static aeroelastic analyses are conducted for CFD/CSD (computational fluid dynamics/computational structural dynamics) numerical simulations. The RBF (radial basis function) method is adopted for the transmission of aerodynamic loads and structural displacements, the diffusion smoothing method is employed for grid deformation in each iteration of CFD/CSD coupling, and the FFD (free-form deformation) method is introduced for the parameterization of variable camber wing. Based on the aerodynamic characteristic curves under different cambers, the discrete variable camber control matrix for the high-aspect-ratio aircraft during the cruise phase is established. The Fibonacci method is employed to optimize the fuel efficiency by utilizing the control matrix. The results indicate that the drag during the cruise phase is reduced obviously and the fuel efficiency is improved evidently comparing to the original configuration.

Improved Computation of the Humanoid Centroidal Dynamics and Application for Whole-Body Control

2016 ◽  
Vol 13 (01) ◽  
pp. 1550039 ◽  
Author(s):  
Patrick M. Wensing ◽  
David E. Orin
Keyword(s):  
Mass Matrix ◽  
Equations Of Motion ◽  
Joint Space ◽  
Body Motion ◽  
Upper Body ◽  
Whole Body ◽  
Computation Method ◽  
Task Space ◽  
New Approach ◽  
Yaw Moment

The control of centroidal momentum has recently emerged as an important component of whole-body humanoid control, resulting in emergent upper-body motions and increased robustness to pushes when included in whole-body frameworks. Previous work has developed specialized computational algorithms for the centroidal momentum matrix (CMM) and its derivative, which relate rates of change in centroidal momentum to joint rates and accelerations of the humanoid. This paper instead shows that specialized algorithms are in fact not always required. Since the dynamics of the centroidal momentum are embedded in the joint-space dynamic equations of motion, the CMM and terms involving its derivative can be computed from the joint-space mass matrix and Coriolis terms. This new approach presents improvements in terms of its generality, compactness, and efficiency in comparison to previous specialized algorithms. The new computation method is then applied to perform whole-body control of a dynamic kicking motion, where the mass matrix and Coriolis terms are already required by the controller. This example motivates how centroidal momentum can be used as an aggregate descriptor of motion in order to ease whole-body motion authoring from a task-space perspective. It further demonstrates emergent upper-body motion from centroidal angular momentum (CAM) control that is shown to provide desirable regulation of the net yaw moment under the foot. Finally, a few perspectives are provided on the use of centroidal momentum control.

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