一米太阳望远镜风载对伺服系统的影响及控制

位于云南抚仙湖的一米太阳望远镜, 由于其特殊的光机结构和开放式观测模式, 位置控制伺服性能受风的影响较大, 这要求望远镜伺服驱动系统应有较好的抗干扰能力。本文首先从一米太阳望远镜的光机特性以及结构出发, 介绍了该望远镜伺服系统的数学模型及其数值模拟, 重点分析了伺服系统中的速度控制器和位置控制器对风载干扰的改善能力。在保证系统稳定性的前提下, 通过提高系统增益来加大伺服系统的刚度, 可以满足一米太阳望远镜在四级风下正常工作的要求。最后给出该望远镜在实际风载情况下伺服系统的性能和短期跟踪精度的实验结果, 该结果表明望远镜伺服系统能满足科学目标及终端仪器对望远镜跟踪精度的要求。

Abstract

The performance of one meter solar telescope position control servosystem was influenced seriously by wind disturbances, because of its special optic and mechanical structure and open observation mode. Therefore its servosystem was required to achieve good disturbance rejection. At first, the telescope’s optic and mechanical properties were described, and then mathematical model and numerical simulation of its soversystem was presented. Furthermore, the rate and position controllers’ abilities to minimise the effect of wind disturbance were analysed in depth. On the premise of servosystem’s stabilisation, to improve servosystem’s stiffness by increasing servosystem’s gain can meet the demand of the telescope working normally under the condition.of moderate breeze disturbance. In the end, experiment results about servosystem performances and short time tracking accuracy were provided. The results show that the servosystem can achieve the tracking precision required of the telescope’s scientific goals and terminal instruments.

参考文献

[1] 楼柯, 刘忠, 张瑞龙, 等. 红外太阳塔抚仙湖老鹰地选址 [J].天文学进展, 2001(2): 112-121.

LOU Ke, LIU Zhong, ZHANG Rui-long, et al. Select site for infrared solar tower at LaoYingDe beside Fuxian lake [J]. Progress in Astronomy, 2001(2): 112-121.

[2] Sobek Robert D. Mitigating wind induced telescope jitter [J]. Proc. of SPIE(S0277-786X), 2005, 5810: 1-10.

[3] Neill Douglas R, Sebag Jacques, Warner Michael, et al. Wind Induced Image Degradation (Jitter) of the LSST Telescope [J]. Proc. of SPIE(S0277-786X), 2008, 7012: 70120w2-70120w11.

[4] Kan Frank W, Eggers Daniel W. Wind Vibration Analyses of Giant Magellan Telescope [J]. Proc. of SPIE(S0277-786X), 2006, 6271: 62710Q1-62710Q 13.

[5] Ukita Nobuharu, Ezawa Hajime, Onodera Sachiko, et al. Wind-induced pointing errors and surface deformation of a 10-m submillimeter antenna [J]. Proc. of SPIE(S0277-786X), 2010, 7733: 77331D1-77331D11.

[6] Bettonvil F C M, Codina R, Hammerschlag R H, et al. The enclosure for the European Solar Telescope (EST) [J]. Proc. of SPIE(S0277-786X), 2010, 7733: 7733331-77333312.

[7] Cho M K, Stepp L, Kim S. Wind buffeting effects on the Gemini 8m primary mirrors [J]. Proc. of SPIE(S0277-786X), 2001, 4444: 302-313.

[8] Erm TM, Angeli G Z. TMT wind model validation with measurements on Keck and Gemini [J]. Proc. of SPIE(S0277-786X), 2006, 6271: 621710N1-621710N10.

[9] Vernet Elise, Lieselotte Jochum ECT. The field stabilization and Adaptive optics mirrors for theEuropean Extremely Large Telescope [J]. Proc. of SPIE(S0277-786X), 2008, 7015: 70150S1-70150S11.

[10] Sedghi B, Müller M, Bonnet H, et al. Field stabilization (tip/tilt control) of E-ELT [J]. Proc. of SPIE(S0277-786X), 2010, 7733: 7733401-77334012.

[11] Sridharan R, Raja Bayanna A, Louis Rohan Eugene, et al. An image stabilization system for solar observations [J]. Proc. of SPIE(S0277-786X), 2007, 6689: 66890Z 1-66890Z 10.

[12] Sedghi B, Müller M, Erm T, et al. Main axes control of E-ELT [J]. Proc. of SPIE(S0277-786X), 2010, 7733: 77331G1-77331G12.

[13] Bauvir Sedghi B, Dimmler M. Acceleration feedback control on an AT [J]. Proc. of SPIE(S0277-786X), 2008, 7012: 70121Q1-70121Q12.

[14] Thompson Peter M, MacMynowski Douglas G, SirotaMark Mark J. Analysis of the TMT Mount Control System [J]. Proc. of SPIE(S0277-786X), 2008, 7012: 70121P-7012114P.

[15] 高钟毓. 机电控制工程 [M].北京: 清华大学出版社, 2002: 43-187.

GAO Zhong-yu. Control engineering about machine and electricity [M]. Beijing: Tsinghua University Press, 2002: 43-187.

[16] 刘金琨. 先进 PID控制及其 MATLAB仿真 [M].北京: 电子工业出版社, 2003: 263-278.

LIU Jin-kun. Advanced PID control and MATLAB simulation [M]. Beijing: Electronic Industry Press, 2003: 263-278.

柳光乾, 程向明, 宋腾飞, 赵雪娟. 一米太阳望远镜风载对伺服系统的影响及控制[J]. 光电工程, 2011, 38(6): 50. LIU Guang-qian, CHENG Xiang-ming, SONG Teng-fei, ZHAO Xue-juan. The Influence and Control of Wind Loading on the One Meter Solar Telescope Servosystem[J]. Opto-Electronic Engineering, 2011, 38(6): 50.

一米太阳望远镜风载对伺服系统的影响及控制

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