2017/12/07 by Michael Neunert, Markus Stäuble, Markus Giftthaler +5 · 1 citation
Computer Science · #cs.RO
paper · pdf · doi:10.1109/lra.2018.2800124
Submitted to "Robotics and Automation: Letters" / "International Conference on Robotics and Automation 2018"
arxiv created 2017/12/07 · arxiv updated 2018/05/30
In this work we present a whole-body Nonlinear Model Predictive Control approach for Rigid Body Systems subject to contacts. We use a full dynamic system model which also includes explicit contact dynamics. Therefore, contact locations, sequences and timings are not prespecified but optimized by the solver. Yet, thorough numerical and software engineering allows for running the nonlinear Optimal Control solver at rates up to 190 Hz on a quadruped for a time horizon of half a second. This outperforms the state of the art by at least one order of magnitude. Hardware experiments in form of periodic and non-periodic tasks are applied to two quadrupeds with different actuation systems. The obtained results underline the performance, transferability and robustness of the approach.