Print Email Facebook Twitter Evaluation and Comparison of SEA Torque Controllers in a Unified Framework Title Evaluation and Comparison of SEA Torque Controllers in a Unified Framework Author Rampeltshammer, Wolfgang (University of Twente) Keemink, Arvid (University of Twente) Sytsma, Menno (University of Twente) van Asseldonk, Edwin (University of Twente) van der Kooij, H. (TU Delft Support Biomechanical Engineering; University of Twente) Date 2023 Abstract Series elastic actuators (SEA) with their inherent compliance offer a safe torque source for robots that are interacting with various environments, including humans. These applications have high requirements for the SEA torque controllers, both in the torque response as well as interaction behavior with its environment. To differentiate state of the art torque controllers, this work introduces a unifying theoretical and experimental framework that compares controllers based on their torque transfer behavior, their apparent impedance behavior, and especially the passivity of the apparent impedance (i.e., their interaction stability) as well as their sensitivity to sensor noise. We compare classical SEA control approaches such as cascaded PID controllers and full state feedback controllers with advanced controllers using disturbance observers, acceleration feedback and adaptation rules. Simulations and experiments demonstrate the trade-off between stable interactions, high bandwidths and low noise levels. Based on these trade-offs, an application-specific controller can be designed and tuned, based on desired interaction with the respective environment. Subject apparent impedanceforce controlinteraction controlpassive controlseries elastic actuators To reference this document use: http://resolver.tudelft.nl/uuid:0eb238c1-e099-4261-a25f-79413048700f DOI https://doi.org/10.3390/act12080303 Source Actuators, 12 (8) Part of collection Institutional Repository Document type journal article Rights © 2023 Wolfgang Rampeltshammer, Arvid Keemink, Menno Sytsma, Edwin van Asseldonk, H. van der Kooij Files PDF actuators_12_00303.pdf 4.04 MB Close viewer /islandora/object/uuid:0eb238c1-e099-4261-a25f-79413048700f/datastream/OBJ/view