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国家自然科学基金(10833004)

作品数:4 被引量:11H指数:2
相关作者:余正洋李国平张振超宋晓莉更多>>
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基于TLV2374的弧线电机电流采样系统
2012年
针对超低速运行的大口径望远镜,设计出一种基于单电源供电的TLV2374弧线永磁同步电机(PMSM)定子绕组电流采样电路,并将采样结果送给TMS320F2812的A/D口进行转换,采用数学的方法校正了其转换精度,经卡尔曼滤波后输出的电流满足高精度的大口径望远镜机架驱动的要求。
宋晓莉张振超
关键词:同步电机电流采样望远镜
An active reflector antenna using a laser angle metrology system被引量:1
2012年
An active reflector is one of the key technologies for constructing large telescopes, especially for millimeter/sub-millimeter radio telescopes. This article in- troduces a new efficient laser angle metrology system for an active reflector antenna on large radio telescopes. Our experiments concentrate on developing an active reflec- tor for improving the detection precisions and the maintenance of the surface shape in real time on the 65-meter prototype radio telescope constructed by Nanjing Institute of Astronomical Optics and Technology (NIAOT; http://65rn.shao.cas.cn/). The test results indicate that the accuracy of the surface shape segmentation and maintenance has the dimensions of microns, and the time-response can be on the order of minutes. Our efforts proved to be workable for sub-millimeter radio telescopes.
Yong ZhangJie ZhangDe-Hua YangGuo-Hua ZhouAi-Hua LiGuo-Ping Li
Panel positioning error and support mechanism for a 30-m THz radio telescope被引量:4
2011年
A 30-m TeraHertz(THz) radio telescope is proposed to operate at 200 μm 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.
De-Hua YangDaniel OkohGuo-Hua ZhouAi-Hua LiGuo-PingJing-Quan Cheng
用于主动光学的气体力促动器设计被引量:7
2011年
鉴于气体促动系统简单、经济并具有快速反应的特点,设计了一种用于主动光学的无摩擦线性气体力促动器结构,以及相应的高频高精度电磁比例调压阀,并做了仿真分析和实验验证,结果表明比例阀调压的气体力促动器输出力在±100 N范围内精度可达0.05 N,PID控制的力促动频率达到0.5 Hz以上。
余正洋李国平
关键词:光学望远镜主动光学气体比例阀
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