A novel 5-DOF high-precision compliant parallel mechanism for large-aperture grating tiling
| Autor: | Zhongxi Shao, Shilei Wu, Hongya Fu, Jinguo Wu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
0209 industrial biotechnology Computer science Mechanical Engineering Capacitive sensing Compliant mechanism 02 engineering and technology Kinematics Grating Topology 01 natural sciences Industrial and Manufacturing Engineering 010309 optics Mechanism (engineering) 020901 industrial engineering & automation Mechanics of Materials Control and Systems Engineering Position (vector) Control system 0103 physical sciences lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials Position sensor Civil and Structural Engineering |
| Zdroj: | Mechanical Sciences, Vol 8, Pp 349-358 (2017) |
| ISSN: | 2191-916X |
| DOI: | 10.5194/ms-8-349-2017 |
| Popis: | In combination with the advantages of parallel mechanisms and compliant mechanisms, a 5-DOF compliant parallel mechanism is designed to meet the requirements, such as large stroke, large load capacity, high precision and high stability, for a large-aperture grating tiling device. The structure and characteristics of the 5-DOF compliant parallel mechanism are presented. The kinematics of the mechanism are derived based on a pseudo-rigid-body model as well. To increase the tiling position retention stability of the mechanism, a closed-loop control system with capacitive position sensors, which are employed to provide feedback signals, is realized. A position and orientation monitoring algorithm and a single neuron adaptive full closed-loop control algorithm are proposed. Performance testing is implemented to verify the accuracy and the tiling position retention stability of the grating tiling device. The experimental results indicate that the tiling accuracy reaches 0.2 µrad per step and 20 nm per step, and the tiling position retention stability can achieve 1.2 µrad per 30 min and 35 nm per 30 min in the rotational direction and the translational direction, respectively. |
| Databáze: | OpenAIRE |
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