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Statistical simulation of rigid bodies

Shu-Wei Hsu, John Keyser
2009 Proceedings of the 2009 ACM SIGGRAPH/Eurographics Symposium on Computer Animation - SCA '09  
We describe a method for replacing certain stages of rigid body simulation with a statistically-based approximation.  ...  Using this approach, we are able to achieve significant improvement in the performance of rigid body simulation.  ...  Conclusion We have presented a method for replacing rigid body simulation by a statistically-based simulation.  ... 
doi:10.1145/1599470.1599489 dblp:conf/sca/HsuK09 fatcat:z7omoczhozepphojvtrihnckvi

Particle swarm optimization for rigid body reconstruction after micro-Doppler removal in radar analysis

Li Hongzhi, Wang Yong
2020 Journal of Systems Engineering and Electronics  
Recently, a method based on short-time Fourier transform (STFT) and L-statistics to remove m-D effects is proposed, which can separate the rigid body parts from interferences introduced by rotating parts  ...  However, during the procedure of removing m-D parts, the useful data of the rigid body parts are also removed together with the m-D interferences.  ...  It proves that the quality of the image using the rigid body reconstruction algorithm is better than L-statistics without rigid body parts reconstructing.  ... 
doi:10.23919/jsee.2020.000023 fatcat:2egbtex63rahnlux5t6tmcz7lq

Simulation of 3D Image Reconstruction in Rigid body Motion

Huihong Chen, Shiming Li, Yansong Wang
2018 MATEC Web of Conferences  
the quality of 3D image reconstruction of rigid body motion.  ...  3D image reconstruction under rigid body motion is affected by rigid body motion and visual displacement factors, which leads to low quality of 3D image reconstruction and more noise, in order to improve  ...  According to the simulation environment and parameters set above, the 3D image reconstruction simulation of the rigid body motion state is carried out.  ... 
doi:10.1051/matecconf/201823202002 fatcat:7j4q6nzszrfoppw3xcsobwcpgy

The Optimal Quaternion Equilibrium Point - Using an Energy Function to Choose the Optimal Quaternion Equilibrium Point
english

Margrete Djupaa, Rune Schlanbusch
2013 Proceedings of the 3rd International Conference on Simulation and Modeling Methodologies, Technologies and Applications  
The equilibrium energy function is developed through a previously presented statistical analysis for the system behaviour of a rigid body in closed loop attitude control. 345 Djupaa M. and Schlanbusch  ...  A new predicting solution of choosing the optimal equilibrium point for rotational maneuvers of a rigid body is presented in this article.  ...  Multiple simulations with different initial angular velocities and initial attitudes of the rigid body were conducted, and the system behaviour of the attitude control was visualized in plots.  ... 
doi:10.5220/0004422903450352 dblp:conf/simultech/DjupaaS13 fatcat:5osoudpm5fbghob66znoork3lq

Constraint-based simulation of interactions between fluids and unconstrained rigid bodies

Sho Kurose, Shigeo Takahashi
2009 Proceedings of the 2009 Spring Conference on Computer Graphics - SCCG '09  
We present a method for simulating stable interactions between fluids and unconstrained rigid bodies.  ...  rigid bodies without worrying about the parameter tweaking.  ...  Note that the statistics on frame rates in this paper exclude this post-process stage of rendering. Figure 1 shows interactions with fluids and two rigid bodies having different densities.  ... 
doi:10.1145/1980462.1980498 dblp:conf/sccg/KuroseT09 fatcat:wn2epyo2cjehbg2wb373fjjvzm

Rigid Body Sampling and Individual Time Stepping for Rigid-Fluid Coupling of Fluid Simulation

Xiaokun Wang, Xiaojuan Ban, Yalan Zhang, Xu Liu
2017 Scientific Programming  
Our approach samples the surface of rigid bodies with boundary particles that interact with fluids.  ...  In this paper, we propose an efficient and simple rigid-fluid coupling scheme with scientific programming algorithms for particle-based fluid simulation and three-dimensional visualization.  ...  Acknowledgments This work was supported by National Natural Science Foundation of China (nos. 61272357, 61300074, and 61572075).  ... 
doi:10.1155/2017/8502691 fatcat:6zvxxqmhubdwhehh5wfecsymla

Page 562 of American Society of Civil Engineers. Collected Journals Vol. 112, Issue 6 [page]

1986 American Society of Civil Engineers. Collected Journals  
In this study, the rotating system is modeled as a spinning rigid body for simplicity. For such a model, the flexibility of the body itself is ig- nored.  ...  Hence, the effects of initial stresses due to axial force and axial torque of the system cannot be accounted for in the rigid body model.  ... 

Quantitative outcome of registration methods for correcting cardiac drift in cardiac PET/CT imaging

Jonathon A. Nye, Dana Tudorascu, Fabio Esteves, John R. Votaw
2016 Journal of Applied Clinical Medical Physics  
Full rigid-body registration showed significant over-correction (p < 0.004) of activity concentrations in the artifact areas of the phantom data due the relocation of highly attenuating structures (i.e  ...  Phantom transmission scans were aligned to the myocardial uptake in the emission scans by applying 1) full rigid-body translations and rotations, 2) rigid-body restricted to medial / lateral and superior  ...  complications of applying rigid-body registrations.  ... 
doi:10.1120/jacmp.v17i2.5806 pmid:27074462 pmcid:PMC5874954 fatcat:bsu6bp3p2zbfvc3pwbw2ufmgri

Affine Body Dynamics: Fast, Stable Intersection-free Simulation of Stiff Materials [article]

Lei Lan, Danny M. Kaufman, Minchen Li, Chenfanfu Jiang, Yin Yang
2022 arXiv   pre-print
Rigid body modeling has thus long remained a fundamental tool and is, by far, the most popular simulation strategy currently employed for modeling stiff solids.  ...  We trace the challenges in the rigid-body IPC (incremental potential contact) method to the necessity of linearizing piecewise-rigid (SE(3)) trajectories and subsequent constraints.  ...  simulation problems where both classes of prior rigid body simulation methods fail altogether.  ... 
arXiv:2201.10022v2 fatcat:u4yclroxojddxkee3rsrt23cku

Page 259 of Journal of Aircraft Vol. 23, Issue 4 [page]

1986 Journal of Aircraft  
An extension to the statistical model was made by Kirk!’ when he added the pitch rigid-body mode, but he removed the flexible mode used in his first model.  ...  developed a general six-degree-of-freedom simulation for a rigid airframe with up to five landing gears.  ... 

Locating Motion Artifacts in Parametric fMRI Analysis [chapter]

A. J. Lacey, N. A. Thacker, E. Burton, A. Jackson
1999 Lecture Notes in Computer Science  
In this paper we assess rigid body co-registration in terms of residual motion artifacts for the different correlation approaches used in fMRI.  ...  We use it in our assesment of rigid body co-registration concluding that it is an acceptable basis for re-alignment, provided that correlation is done using a measure which estimates variance from the  ...  The objective of this work was to develop a technique to test whether rigid body co-registration successfully removes motion effects to a statistically acceptable level.  ... 
doi:10.1007/10704282_57 fatcat:bbkscgbmrvfsnmsoyeo6hnlf3u

A NOVEL SIMULATION APPROACH OF AIRCRAFT DYNAMIC RCS

Ya-Qiang Zhuang, Chen-Xin Zhang, Xiao-Kuan Zhang
2014 Progress In Electromagnetics Research M  
The statistical characteristics of three kinds of dynamic RCS values are investigated, and the desirable agreement of results between modification and measurement shows the applicability of this simulation  ...  The Radar Cross Section (RCS) of moving targets varies dramatically with aspect or time. The accuracy of simulated dynamic RCS is very important for radar system simulation.  ...  ACKNOWLEDGMENT This work is supported by the National Natural Science Foundation of China (Grant No. 61372166).  ... 
doi:10.2528/pierm14040311 fatcat:3zz36htepngzjmrozsyip4suyq

Computing the Free Energy along a Reaction Coordinate Using Rigid Body Dynamics

Peng Tao, Alexander J. Sodt, Yihan Shao, Gerhard König, Bernard R. Brooks
2014 Journal of Chemical Theory and Computation  
a rigid body during the simulation.  ...  Each structure along the reference reaction path is separately subjected to such a rigid body simulation.  ...  Each of the structures is subjected to rigid body molecular dynamics with identified key atoms forming a single rigid body throughout the simulation.  ... 
doi:10.1021/ct500342h pmid:25328492 pmcid:PMC4196739 fatcat:b5e2eqrlyffqdeo7onsqzelawm

COUPLED SPIN AND SHAPE EVOLUTION OF SMALL RUBBLE-PILE ASTEROIDS: SELF-LIMITATION OF THE YORP EFFECT

Desireé Cotto-Figueroa, Thomas S. Statler, Derek C. Richardson, Paolo Tanga
2015 Astrophysical Journal  
from the rigid-body prediction.  ...  Mass loss occurs in one-third of the simulations, typically in small amounts from the ends of a prolate-triaxial body.  ...  Two of the four simulations with higher resolution tilings have rigid-body end states of formally infinite spin and the other two have rigid-body end state spins of zero, reached in finite t YC while the  ... 
doi:10.1088/0004-637x/803/1/25 fatcat:jw4ftdfin5ebzidbt3yt6s6p3q

Detecting vorticity in cohesive deformable granular material

Olivier Bouillanne, Guilhem Mollon, Aurélien Saulot, Sylvie Descartes, Nathalie Serres, Karim Demmou, Guillaume Chassaing, M.A. Aguirre, S. Luding, L.A. Pugnaloni, R. Soto
2021 EPJ Web of Conferences  
DEM-like simulations are used to model particles of third-body, which are partly wear debris from rubbing bodies.  ...  The results show that different vortex sizes can be observed during the simulation.  ...  Two rigid or deformable bodies are placed at the bottom and the top of the simulated area. Between them, a collection of deformable and cohesive grains represents the third-body.  ... 
doi:10.1051/epjconf/202124908005 fatcat:tmtpflluw5f35ib7mbttx2s36e
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