Robust disturbance estimation for human-robotic comanipulation

S. Lichiardopol, N. Wouw, van de, H. Nijmeijer

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)
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Abstract

External forces affect the dynamics of load-carrying robot devices. The knowledge of such disturbances is generally needed for control purposes. However, direct disturbance measurement using force sensors is not always possible. This paper introduces a force estimator for force-sensor-less robotic manipulators. The algorithm is based on the knowledge of the dynamics of the robotic device, whereas mass of the load is typically unknown. Using this algorithm, low-frequency external forces can be estimated robustly even for quasi-statically time-varying and uncertain loads. Experiments validate the proposed strategy in practice. Moreover, the applicability of the estimation algorithm is further illustrated by using it in a human–robot comanipulation setup in which the robot is providing additional coordinated forcing to alleviate human effort needed to manipulate the robot.
Original languageEnglish
Pages (from-to)1772-1796
Number of pages25
JournalInternational Journal of Robust and Nonlinear Control
Volume24
Issue number12
DOIs
Publication statusPublished - 2014

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