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Hesselbach, J.; Raatz, A.: Compliant parallel robot with 6 DOF. In: Nelson, B.J.; Breguet, J.-M. (Eds.): Microrobotics and microassembly III : 29 - 30 October 2001, Newton, USA. Bellingham, Wash. : SPIE, 2001 (Proceedings of SPIE ; 4568), S. 143-150

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/13315

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Sum total of downloads: 67




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Abstract: 
In this paper a patented parallel structure1 will be presented in which conventional bearings are replaced by flexure hinges made of pseudo-elastic shape memory alloy. The robot has six degrees of freedom and was developed for micro assembly tasks. Laboratory tests made with the robot using conventional bearings have shown that the repeatability was only a couple of 1/100 mm instead of the theoretical resolution of the platform of < 1 pm. Especially the slip-stick effects of the bearings decreased the positional accuracy. Because flexure hinges gam their mobility only by a deformation of matter, no backlash, friction and slip-stick-effects exist in flexure hinges. For this reason the repeatability of robots can be increased by using flexure hinges. Joints with different degrees of freedom had to be replaced in the structure. This has been done by a combination of flexure hinges with one rotational degree of freedom. FEM simulations for different designs of the hinges have been made to calculate the possible maximal angular deflections. The assumed maximal deflection of 20° of the hinges restricts the workspace of the robot to 28x28 mm with no additional rotation of the working platform. The deviations between the kinematic behavior of the compliant parallel mechanism and its rigid body model can be simulated with the FEM.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: BookPart
Publishing status: publishedVersion
Issue Date: 2001
Appears in Collections:Fakultät für Maschinenbau

distribution of downloads over the selected time period:

downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 30 44.78%
2 image of flag of United States United States 15 22.39%
3 image of flag of Czech Republic Czech Republic 3 4.48%
4 image of flag of China China 3 4.48%
5 image of flag of Russian Federation Russian Federation 2 2.99%
6 image of flag of Ireland Ireland 2 2.99%
7 image of flag of France France 2 2.99%
8 image of flag of Belgium Belgium 2 2.99%
9 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 1 1.49%
10 image of flag of Canada Canada 1 1.49%
    other countries 6 8.96%

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