Project description: Stable and effective enforcement of hard constraints is one of the crucial components in controlling physics-based dynamic simulation systems. The conventional explicit Baumgarte constraint stabilization confines the time step to be within a stability limit and requires users to pick problem-dependent coefficients to achieve fast convergence or to prevent oscillation. Current methods are not suitable for deformable objects because of the complexity of degrees of freedom in deformable objects. We would like to achieve more efficient and accurate constraint enforcement schemes.
 

Publications:

Min Hong, Sunwha Jung, Min-Hyung Choi, and Samuel Welch, Fast Volume Preservation for a Mass-Spring System, In IEEE Computer Graphics and Applications, pp83-91,  September/October, 2006 PDF BiBTeX

Min Hong, Samuel Welch, John Trapp, and Min-Hyung Choi, The Implicit Constraint Enforcement for Rigid Body Simulation, In Proceedings of International Conference on Computational Science Visualization and Virtual Reality, June 2006 PDF BiBTeX

Min Hong, Min-Hyung Choi Sunwha Jung, Samuel Welch, John Trapp, “Effective Constrained Dynamic Simulation Using Implicit Constraint Enforcement,” Proceedings of the IEEE International Conference of Robotics and Automation (ICRA 05), April 2005  PDF BiBTeX

Videos 

Robot arm video

 

Min Hong, Samuel Welch, and Min Choi, Intuitive Control of Dynamic Simulation using Improved Implicit Constraint Enforcement. Proceedings of Asia Simulation Conference, October 2004
Also  published in Springer-Velag Lecture Notes in Computer Science, Vol. 3398, p315-422 2005  PDF BiBTeX

 

Hongjun Jeon, Min-Hyung Choi, Min Hong, “Numerical Stability and Convergence Analysis of Geometric Constraint Enforcement in Dynamic Simulation Systems”, Proceedings of International Conference on Modeling, Simulation and Visualization Methods, June 2004 PDF BiBTeX