no code implementations • 15 Feb 2023 • Ryan K. Cosner, Preston Culbertson, Andrew J. Taylor, Aaron D. Ames
To this end, we leverage Control Barrier Functions (CBFs) which guarantee that a robot remains in a ``safe set'' during its operation -- yet CBFs (and their associated guarantees) are traditionally studied in the context of continuous-time, deterministic systems with bounded uncertainties.
no code implementations • 1 Apr 2022 • Andrew J. Taylor, Pio Ong, Tamas G. Molnar, Aaron D. Ames
Complex control systems are often described in a layered fashion, represented as higher-order systems where the inputs appear after a chain of integrators.
1 code implementation • 1 Apr 2022 • Noel Csomay-Shanklin, Andrew J. Taylor, Ugo Rosolia, Aaron D. Ames
Modern control systems must operate in increasingly complex environments subject to safety constraints and input limits, and are often implemented in a hierarchical fashion with different controllers running at multiple time scales.
no code implementations • 22 Mar 2022 • Andrew J. Taylor, Victor D. Dorobantu, Ryan K. Cosner, Yisong Yue, Aaron D. Ames
Existing design paradigms do not address the gap between theory (controller design with continuous time models) and practice (the discrete time sampled implementation of the resulting controllers); this can lead to poor performance and violations of safety for hardware instantiations.
1 code implementation • 28 Apr 2021 • Ryan K. Cosner, Andrew W. Singletary, Andrew J. Taylor, Tamas G. Molnar, Katherine L. Bouman, Aaron D. Ames
The increasing complexity of modern robotic systems and the environments they operate in necessitates the formal consideration of safety in the presence of imperfect measurements.
no code implementations • 21 Nov 2020 • Andrew J. Taylor, Victor D. Dorobantu, Sarah Dean, Benjamin Recht, Yisong Yue, Aaron D. Ames
Modern nonlinear control theory seeks to endow systems with properties such as stability and safety, and has been deployed successfully across various domains.
no code implementations • 9 Nov 2020 • Anna Wolz, Kent Yagi, Nick Anderson, Andrew J. Taylor
We found quasi-universal relations among the mass, moment of inertia, and tidal deformability of a white dwarf that do not depend sensitively on the white dwarf composition.
High Energy Astrophysical Phenomena Solar and Stellar Astrophysics General Relativity and Quantum Cosmology
1 code implementation • 30 Oct 2020 • Sarah Dean, Andrew J. Taylor, Ryan K. Cosner, Benjamin Recht, Aaron D. Ames
The guarantees ensured by these controllers often rely on accurate estimates of the system state for determining control actions.
no code implementations • 18 Mar 2019 • Andrew J. Taylor, Victor D. Dorobantu, Meera Krishnamoorthy, Hoang M. Le, Yisong Yue, Aaron D. Ames
The goal of this paper is to understand the impact of learning on control synthesis from a Lyapunov function perspective.
no code implementations • 4 Mar 2019 • Andrew J. Taylor, Victor D. Dorobantu, Hoang M. Le, Yisong Yue, Aaron D. Ames
Many modern nonlinear control methods aim to endow systems with guaranteed properties, such as stability or safety, and have been successfully applied to the domain of robotics.