no code implementations • 5 Apr 2023 • Erjen Lefeber, Marcus Greiff, Anders Robertsson
We propose an observer for rotational dynamics subject to directional and gyroscopic measurements, which simultaneously estimates the gyroscopic biases and attitude rates.
no code implementations • 17 Jan 2022 • Zhiyong Sun, Marcus Greiff, Anders Robertsson, Rolf Johansson, Brian D. O. Anderson
We develop a general framework involving differential-algebraic equations and viability theory to determine coordination feasibility for a coordinated motion control under heterogeneous vehicle dynamics and different types of coordination task constraints.
no code implementations • 3 Oct 2021 • Marcus Greiff, Patrik Persson, Zhiyong Sun, Karl Åström, Anders Robertsson
We present a trajectory tracking controller for a quadrotor unmanned aerial vehicle (UAV) configured on $SU(2)\times R^3$, and relate this result to a family of geometric tracking controllers on $SO(3)\times R^3$.