Panel positioning error and support mechanism for a 30-m THz radio telescope
DeHua Yang1; Daniel Okoh2; GuoHua Zhou1; AiHua Li1; GuoPing Li1; JingQuan Cheng3
Source PublicationResearch in Astronomy and Astrophysics
AbstractA 30-m TeraHertz (THz)radio telescope is proposed to operate at 200 &10m with an active primary surface.This paper presents sensitivity analysis of active surface panel positioning errors with optical performance in terms of the Strehl ratio.Based on Ruze's surface error theory and using a Monte Carlo simulation,the effects of six rigid panel positioning errors,such as piston,tip,tilt,radial,azimuthal and twist displacements,were directly derived.The optical performance of the telescope was then evaluated using the standard Strehl ratio.We graphically illustrated the various panel error effects by presenting simulations of complete ensembles of full reflector surface errors for the six different rigid panel positioning errors.Study of the panel error sensitivity analysis revealed that the piston error and tilt/tip errors are dominant while the other rigid errors are much less important.Furthermore,as indicated by the results,we conceived of an alternative Master-Slave Concept-based (MSC-based)active surface by implementating a special Series-Parallel Concept-based (SPC-based)hexapod as the active panel support mechanism.A new 30-m active reflector based on the two concepts was demonstrated to achieve correction for all the six rigid panel positioning errors in an economically feasible way.
Document Type期刊论文
2.Centre for Basic Space Science,National Space Research and Development Agency,University of Nigeria
3.National Radio Astronomy Observatory
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
DeHua Yang,Daniel Okoh,GuoHua Zhou,et al. Panel positioning error and support mechanism for a 30-m THz radio telescope[J]. Research in Astronomy and Astrophysics,2011,11(6):725–736.
APA DeHua Yang,Daniel Okoh,GuoHua Zhou,AiHua Li,GuoPing Li,&JingQuan Cheng.(2011).Panel positioning error and support mechanism for a 30-m THz radio telescope.Research in Astronomy and Astrophysics,11(6),725–736.
MLA DeHua Yang,et al."Panel positioning error and support mechanism for a 30-m THz radio telescope".Research in Astronomy and Astrophysics 11.6(2011):725–736.
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