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Issue No.04 - July/August (2011 vol.31)
pp: 22-33
Yeuhi Abe , Massachusetts Institute of Technology
Jovan Popovi´c , Adobe Systems
Tracking controllers produce realistic motion in simulations by mimicking an input motion. However, current time-indexed trackers adhere strictly to the input motion's timing, causing a lack of robustness. A new phase-indexed tracker for 2D characters can deviate from the input motion's timing. Compared to time-indexed tracking with a state-of-the-art nonlinear quadratic regulator, phase-indexed tracking can withstand force perturbations up to an order of magnitude larger. The phase-indexed controller employs motion constraints that induce a reduced dynamic for which we can design control policies that incorporate prediction.
motion constraints, tracking, character controller, animation, physical simulation, computer graphics, graphics and multimedia
Yeuhi Abe, Jovan Popovi´c, "Simulating 2D Gaits with a Phase-Indexed Tracking Controller", IEEE Computer Graphics and Applications, vol.31, no. 4, pp. 22-33, July/August 2011, doi:10.1109/MCG.2011.62
1. R. Featherstone, Rigid Body Dynamics Algorithms, Springer, 2008.
2. E.R. Westervelt et al., Feedback Control of Dynamic Bipedal Robot Locomotion, CRC Press, 2007.
3. A. Goswami, "Foot Rotation Indicator (FRI) Point: A New Gait Planning Tool to Evaluate Postural Stability of Biped Robots," Proc. 1999 IEEE Int'l Conf. Robotics and Automation (ICRA 99), IEEE CS Press, 1999, pp. 47–52.
4. D.P. Bertsekas and J.N. Tsitsiklis, Neuro-dynamic Programming, Athena Scientific, 1996.
5. K. Yin, K. Loken, and M. van de Panne, "Simbicon: Simple Biped Locomotion Control," ACM Trans. Graphics, vol. 26, no. 3, 2007, article 105.
6. M. da Silva, Y. Abe, and J. Popović, "Interactive Simulation of Stylized Human Locomotion," ACM Trans. Graphics, vol. 27, no. 3, 2008, article 82.
7. U. Muico et al., "Contact-Aware Nonlinear Control of Dynamic Characters," ACM Trans. Graphics, vol. 28, no. 3, 2009, pp. 1–9.
8. K. Erleben, "Velocity-Based Shock Propagation for Multi-body Dynamics Animation," ACM Trans. Graphics, vol. 26, no. 2, 2007, article 12.
9. C. Chevallereau, J.W. Grizzle, and C.L. Shih, "Asymptotically Stable Walking of a Five-Link Underactuated 3D Bipedal Robot," IEEE Trans. Robotics, vol. 25, no. 1, 2008, pp. 37–50.
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