Campisano, F, Remirez, AA, Calò, S orcid.org/0000-0003-4696-7498 et al. (4 more authors) (2020) Online Disturbance Estimation for Improving Kinematic Accuracy in Continuum Manipulators. IEEE Robotics and Automation Letters, 5 (2). pp. 2642-2649. ISSN 2377-3766
Abstract
Continuum manipulators are flexible robots which undergo continuous deformation as they are actuated. To describe the elastic deformation of such robots, kinematic models have been developed and successfully applied to a large variety of designs and to various levels of constitutive stiffness. Independent of the design, kinematic models need to be calibrated to best describe the deformation of the manipulator. However, even after calibration, unmodeled effects such as friction, nonlinear elastic and/or spatially varying material properties as well as manufacturing imprecision reduce the accuracy of these models. In this letter, we present a method for improving the accuracy of kinematic models of continuum manipulators through the incorporation of orientation sensor feedback. We achieve this through the use of a “disturbance wrench,” which is used to compensate for these unmodeled effects, and is continuously estimated based on orientation sensor feedback as the robot moves through its workspace. The presented method is applied to the HydroJet, a waterjet-actuated soft continuum manipulator, and shows an average of 40% reduction in root mean square position and orientation error in the two most common types of kinematic models for continuum manipulators, a Cosserat rod model and a pseudo-rigid body model.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 IEEE. This is an author produced version of a paper published in IEEE Robotics and Automation Letters. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Medical robots and systems; kinematics; flexible robots |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Robotics, Autonomous Systems & Sensing (Leeds) |
Funding Information: | Funder Grant number Royal Society wm150122 National Institute of Health - NIH (PHS) 6R01EB018992 EPSRC (Engineering and Physical Sciences Research Council) EP/P027938/1 NIHR National Inst Health Research 16/137/44 EU - European Union 818045 |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Feb 2020 14:45 |
Last Modified: | 09 Mar 2020 11:14 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Identification Number: | 10.1109/LRA.2020.2972880 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:156331 |