Application of stable inversion to flexible manipulators modeled by the absolute nodal coordinate formulation

Drücker, Svenja; Seifried, Robert

doi:10.15480/882.4968

Application of stable inversion to flexible manipulators modeled by the absolute nodal coordinate formulation

Citation Link: https://doi.org/10.15480/882.4968

Publikationstyp

Journal Article

Date Issued

2023-03-01

Sprache

English

Author(s)

Drücker, Svenja

Seifried, Robert

Institut

Mechanik und Meerestechnik M-13

TORE-DOI

10.15480/882.4968

TORE-URI

http://hdl.handle.net/11420/14938

Journal

GAMM-Mitteilungen

Volume

46

Issue

1

Article Number

e202300004

Citation

GAMM-Mitteilungen 46 (1): e202300004 (2023)

Publisher DOI

10.1002/gamm.202300004

Scopus ID

2-s2.0-85149384870

Publisher

Wiley-VCH Verlag

Peer Reviewed

true

Compared to conventional robots, flexible manipulators offer many advantages, such as faster end-effector velocities and less energy consumption. However, their flexible structure can lead to undesired oscillations. Therefore, the applied control strategy should account for these elasticities. A feedforward controller based on an inverse model of the system is an efficient way to improve the performance. However, unstable internal dynamics arise for many common flexible robots and stable inversion must be applied. In this contribution, an approximation of the original stable inversion approach is proposed. The approximation simplifies the problem setup, since the internal dynamics do not need to be derived explicitly for the definition of the boundary conditions. From a practical point of view, this makes the method applicable to more complex systems with many unactuated degrees of freedom. Flexible manipulators modeled by the absolute nodal coordinate formulation (ANCF) are considered as an application example.