Stable Forbidden-Region Virtual Fixtures for Bilateral Telemanipulation
- 16 September 2005
- journal article
- Published by ASME International in Journal of Dynamic Systems, Measurement, and Control
- Vol. 128 (1), 53-64
- https://doi.org/10.1115/1.2168163
Abstract
There has been recent interest in novel human-machine collaborative control laws, called “virtual fixtures,” which provide operator assistance for telemanipulation tasks. A forbidden-region virtual fixture is a constraint, implemented in software, that seeks to prevent the slave manipulator of a master/slave telemanipulation system from entering into a forbidden region of the workspace. In this paper, we consider the problem of unstable vibrations of the slave and/or master against forbidden-region virtual fixtures for a general class of telemanipulator control architectures, including those with haptic feedback. To the best of the authors’ knowledge, there has been no rigorous study of the stability of forbidden-region virtual fixtures in previous work. The system is evaluated around the master and slave equilibrium position resulting from a constant desired human input force, using a discrete state-space model. We present a method to analytically determine if instability is possible in the system. We thoroughly evaluate this method, experimentally, applying malicious user strategies that attempt to drive the system unstable. Our approach agrees with experimental results and can be used to design and analyze the stability and transient properties of a telemanipulator interacting with virtual fixtures. We show that the user can affect both slave- and master-side virtual fixture stability by modifying his or her impedance characteristics. However, the upper bound on stable slave-side virtual fixture stiffness does not depend on the particular user.Keywords
This publication has 23 references indexed in Scilit:
- Stable Forbidden-Region Virtual Fixtures for Bilateral TelemanipulationJournal of Dynamic Systems, Measurement, and Control, 2005
- The role of force feedback in surgery: analysis of blunt dissectionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Vision-Assisted Control for Manipulation Using Virtual FixturesIEEE Transactions on Robotics, 2004
- Steady-hand teleoperation with virtual fixturesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Virtual fixture architectures for telemanipulationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- On application of virtual fixtures as an aid for telemanipulation and trainingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Cobot implementation of virtual paths and 3-D virtual surfacesIEEE Transactions on Robotics and Automation, 2003
- The Intuitive/sup TM/ telesurgery system: overview and applicationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Remote Control RoboticsPublished by Springer Science and Business Media LLC ,1999
- Virtual fixtures: Perceptual tools for telerobotic manipulationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1993