SHAO Zhong-xi, ZHANG Qing-chun, BAI Qing-shun, FU Hong-ya. Design method of controlling device for tiling high pecision and large aperture grating[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 158-165
SHAO Zhong-xi, ZHANG Qing-chun, BAI Qing-shun, FU Hong-ya. Design method of controlling device for tiling high pecision and large aperture grating[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 158-165DOI:
Design method of controlling device for tiling high pecision and large aperture grating
A mechanical grating tiling device is designed by a macro-micro dual-drive parallel mechanism with a few Degrees of Freedom(DOF). The raster matching device is composed of a macro-moving part using a step-motor controlled ballscrew unit(a 5PTS-1PPS parallel mechanism)and a micro-moving part using a piezoelectric ceramics controlled flexure hinge(a 5TSP-1PPS parallel mechanism) in series. The DOFs for the macro-moving part and the micro-moving part have been calculated and the control algorithms are deduced through inversing dynamics of parallel mechanism. Then
the point-point controls of the macro-moving part and the micro-moving part are simulated subsequently. In order to improve positioning precision of this mechanism
system errors have been analyzed and modified. Finally
above control algorithms are applied to the grating tiling device and experimental results indicate that the maximum linear location error is 3.6 m and the maximum rotation error is 4.4 rad for the macro-moving part; the 0.06 m and 1.2 rad for the micro-moving part
obtained data can meet the precision requirement of grating tiling system.
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