ALMA Nutator Design and Preliminary Performance

被引：0

作者：

Martin-Cocher, Pierre ^{[1
]}

Ford, John ^{[2
]}

Koch, Patrick M. ^{[1
]}

Ni, Chih-Wen ^{[3
]}

Chen, Wei-Long ^{[4
]}

Chen, Ming-Tang ^{[1
]}

Raffin, Phillippe ^{[1
]}

Ong, Chin-Long ^{[5
]}

Ho, Paul T. P. ^{[1
]}

Symmes, Arthur ^{[2
]}

机构：

[1] Acad Sinica, Inst Astron & Astrophys, 1 Roosevelt Rd,Sec 4, Taipei 10617, Taiwan

[2] Natl Radio Astron Observ, Green Bank, WV 24944 USA

[3] Realscene Technol Corp, Taichung 42847, Taiwan

[4] Chaoyang Univ Technol, Dept Ind Design, Taichung, Taiwan

[5] COTECH Inc, Taichung 43541, Taiwan

来源：

MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY VI | 2012年 / 8452卷

关键词：

ALMA; nutator; class D; high-modulus carbon fiber;

D O I：

10.1117/12.925809

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the past two years of collaboration between the different actors on the ALMA nutator. Building on previous developments, the nutator has seen changes in much of the design. A high-modulus carbon fiber structure has been added on the back of the mirror in order to transfer the voice coils forces with less deformation, thus reducing delay problems due to flexing. The controller is now an off-the-shelf National Instrument NI-cRIO, and the amplifier a class D servo drive from Advanced Motion Controls, with high peak power able to drive the coils at 300 Volts DC. The stow mechanism has been totally redesigned to improve on the repeatability and precision of the stow position, which is also the reference for the 26 bits Heidenhain encoders. This also improves on the accuracy of the stow position with wind loading. Finally, the software, written largely with National Instrument's LabView, has been developed. We will discuss these changes and the preliminary performance achieved to date.

引用

页数：12

共 6 条

[1]

Dorf R.C., MODERN CONTROL SYSTE

[2]

Gasho Victor L., 2002, SPIE

[3]

Jiang Homin, 2010, IEEE, P962

[4]

PASCOAL AM, 1989, AMER CONTR CONF CONF, P19

[5]

Thomson A.R., 2009, IEEE, V97, P1463

[6]

Workman M. L., 1987, DEC CONTR 1987 26 IE, V26, P1548

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