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Elastic Structure Preserving (ESP) Control for Compliantly Actuated Robots

Keppler, Manuel und Lakatos, Dominic und Ott, Christian und Albu-Schäffer, Alin Olimpiu (2018) Elastic Structure Preserving (ESP) Control for Compliantly Actuated Robots. IEEE Transactions on Robotics. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/tro.2017.2776314. ISSN 1552-3098.

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Kurzfassung

Physical compliance can be considered one of the key technical properties a robot should exhibit to increase its mechanical robustness. In addition, the accompanying temporal energy storing capabilities enable explosive and energy efficient cyclic motions. But these advantages come at a price, as compliance introduces unwanted intrinsic oscillatory dynamics, underactuation, and reduces the natural frequency of the plant. These aspects make control of the link configuration variables a challenging task. This work presents two novel control methods for implementing link-side motion tracking capabilities and injecting a desired damping characteristic to suppress link vibrations along the reference trajectory for compliantly actuated robots with nonlinear elastic characteristics. We prove their uniform global asymptotic stability by invoking a theorem by Matrosov. Both approaches, namely ESP and ESP+, have in common that they preserve the link-side inertial properties and the elastic structure of the original plant dynamics, hence the name Elastic Structure Preserving control. Apart from that, ESP control focuses on preserving the inertial properties of motor dynamics. While ESP+ control aims at minimizing the dynamic shaping on the motor side. The performance of the feedback control laws have been evaluated on the variable stiffness robot arm DLR Hand Arm System, where the stiffness in each of its joints is highly nonlinear. To the best of our knowledge, this is the first experimentally validated tracking controller for compliantly actuated, multi-joint robots with nonlinear elastic elements.

elib-URL des Eintrags:https://elib.dlr.de/127895/
Dokumentart:Zeitschriftenbeitrag
Titel:Elastic Structure Preserving (ESP) Control for Compliantly Actuated Robots
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Keppler, ManuelManuel.Keppler (at) dlr.dehttps://orcid.org/0000-0002-1532-963XNICHT SPEZIFIZIERT
Lakatos, DominicDominic.Lakatos (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ott, ChristianChristian.Ott (at) dlr.dehttps://orcid.org/0000-0003-0987-7493NICHT SPEZIFIZIERT
Albu-Schäffer, Alin OlimpiuAlin.Albu-Schaeffer (at) dlr.dehttps://orcid.org/0000-0001-5343-9074142115794
Datum:April 2018
Erschienen in:IEEE Transactions on Robotics
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1109/tro.2017.2776314
Verlag:IEEE - Institute of Electrical and Electronics Engineers
ISSN:1552-3098
Status:veröffentlicht
Stichwörter:Compliant Robots, Damping Control, Passivity-Based Control, Tracking Control, Variable Stiffness Joints
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Technik für Raumfahrtsysteme
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R SY - Technik für Raumfahrtsysteme
DLR - Teilgebiet (Projekt, Vorhaben):R - Interagierende Robotersteuerung [SY]
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Robotik und Mechatronik (ab 2013) > Analyse und Regelung komplexer Robotersysteme
Hinterlegt von: Keppler, Manuel
Hinterlegt am:28 Jun 2019 12:52
Letzte Änderung:02 Nov 2023 10:25

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