TMT M3 system tilt axis bearing method

	TMT M3 system tilt axis bearing method
	Zhao, H.; J. Zhang and F. Yang
	2015
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
卷号	44 期号:1 页码:122-126
摘要	The tertiary mirror pointing assembly(M3PA) of the thirty meters telescope(TMT) is the largest tertiary mirror in the world. The tracking and pointing performance of M3PA is better than any other telescopes which have been built, and the working condition is even worse. So the designers face an enormous challenge. The tracking system includes the bottom rotator axes and the tilt axes. The study of this paper focused on the tilt axes. There were two bearing arrangement methods for the tilt axes. The first one used two single angular contact bearing to stand the shaft. The second used two double rows angular contact bearings. They both met the requirement when the M3PA was vertical. But the first method became invalid when the M3PA was horizontal, while the second can provide a better support about 15.1 Hz of the first modal frequency. Then some FEA were done to find out the carrying capacity of the bearings. The results show that the maximum load applied on the rollers is up to 5 000 N, while the maximum stress is up to 2 300 MPa. Otherwise, the load distribution just likes a cosine curve. So it can be found that the analysis is believable. In addition, there are evident load applied on the four rows rollers, which proves that the bearing arrangement can disperse the load effectively. It can be concluded that the selection of the bearing arrangement is a good choice for TMT tilt axes design. , 2015, Chinese Society of Astronautics. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56323
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhao, H.,J. Zhang and F. Yang. TMT M3 system tilt axis bearing method[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2015,44(1):122-126.
APA	Zhao, H.,&J. Zhang and F. Yang.(2015).TMT M3 system tilt axis bearing method.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,44(1),122-126.
MLA	Zhao, H.,et al."TMT M3 system tilt axis bearing method".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 44.1(2015):122-126.

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