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- W4285253840 abstract "This article presents a hierarchical passivity-based compliance controller that exploits robot redundancy and aims at achieving an impedance behavior with a time-varying stiffness on all the priority levels. Unfortunately, this gives rise to certain control actions that lead to the loss of the safety-critical passivity feature. To deal with this problem, we employ the concept of virtual <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>energy tanks</i> that keep track of the passivity violating energy in the system, ensuring that it remains bounded. This restores the passivity in the system, which guarantees the stable interaction with any passive environment. Furthermore, we augment our controller with an additional safety layer, which ensures that the energy injected through the tank into the system remains below a safe limit, defined based on the maximum kinetic energy allowed in the system. Finally, our approach is validated in terms of performance during task execution and safety both in simulations and on real-robot hardware." @default.
- W4285253840 created "2022-07-14" @default.
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- W4285253840 date "2022-12-01" @default.
- W4285253840 modified "2023-09-30" @default.
- W4285253840 title "Safety-Aware Hierarchical Passivity-Based Variable Compliance Control for Redundant Manipulators" @default.
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- W4285253840 doi "https://doi.org/10.1109/tro.2022.3174478" @default.
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