{"id":462,"date":"2017-06-04T09:00:00","date_gmt":"2017-06-04T09:00:00","guid":{"rendered":"http:\/\/pfs.ipmu.jp\/blog\/?p=462"},"modified":"2017-11-02T13:36:47","modified_gmt":"2017-11-02T13:36:47","slug":"assembly-of-positioner-module-is-in-progress-%e3%83%95%e3%82%a1%e3%82%a4%e3%83%90%e3%83%bc%e9%85%8d%e7%bd%ae%e3%83%a2%e3%82%b8%e3%83%a5%e3%83%bc%e3%83%ab%e7%b5%84%e3%81%bf%e7%ab%8b%e3%81%a6%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/pfs.naoj.org\/blog\/2017\/06\/p462","title":{"rendered":"Assembly of positioner module is in progress \/ \u30d5\u30a1\u30a4\u30d0\u30fc\u914d\u7f6e\u30e2\u30b8\u30e5\u30fc\u30eb\u7d44\u307f\u7acb\u3066\u4e2d"},"content":{"rendered":"

PFS instrument catches light from about 2400 astronomical objects using fibers paved on the focal plane at the prime focus of the Subaru telescope, and each fiber is positioned by 2-staged actuator called “Cobra” (). As talked in the previous posts<\/a>, 57 assemblies of Cobra positioners and fibers are integrated to one module, which is mounted to the optical bench. Since mass production of fiber positioners<\/a> started early this year, the integration\u00a0of the first module has been in progress at Caltech, the US, where engineers from Caltech and NASA\/JPL who expert on positioners, and those from LNA (Laborat\u00f3rio Nacional de Astrof\u00edsica, Brazil) in charge of fiber parts, are working together.
\nIn this article, we will talk about assembly of Cobra module, spotlighting positioners.<\/p>\n

A module has 2 lines of Cobra positioners controlled using 2 electronic board. In the below video, 28 positioners in one line are moved simultaneously using one board. The fibers will be assembled in the future.<\/p>\n

\nhttps:\/\/pfs.naoj.org\/blog\/wp-content\/uploads\/2017\/05\/cobra1st.mp4<\/a><\/video><\/div>\n

In parallel with development of the first Cobra module, the software to control positioners has been developed by team from NASA\/JPL (Jet Propulsion Laboratory). To cover entire field of view, each fiber patrol area, where a fiber moves around, overlaps slightly with neighboring fibers. Hence, their collision potentially happens. The software is being developed following discussions how to move positioners to reduce the possibility of collision, and how to calibrate positioners to converge them to a target position well. Simulations of collisions has also been carried out.<\/p>\n

\"\"
\n<\/a>[ Discussion on strategy of Cobra calibration. \u00a0From left: \u00a0Dr. Johannes Gross (Engineer, NASA\/JPL), Dr. Daniel Reiley (Engineer, Caltech) ]<\/em><\/p>\n

Completed modules will be shipped to ASIAA (Academia Sinica, Institute of Astronomy and Astrophysics) in Taiwan, where the modules will be mounted to the optical bench, and about 8-meter long fibers will be routed inside of main structure. \u00a0Because of tight spacing, devoting great care is needed to integration work not to damage the instruments. Therefore, ASIAA team have made full-size mock-ups to practice the assembly.<\/p>\n

\"\"<\/a>\u00a0[\u00a0Mock-up of Cobra module (full-scale) ]<\/em><\/p>\n

\"\"
\n<\/a>[ Demonstration of assembly of Cobra modules by ASIAA team. A guide rail is used for mount. From left, Mr. Hsin-Yo, Chen (Engineer), Mr. \u00a0Yin-Chang Chang (Engineer), and Prof. Shiang-Yu Wang ]<\/em><\/p>\n

\n

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\n\u4eca\u56de\u306f\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u306b\u6ce8\u76ee\u3057\u3066\u8a18\u4e8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

\u3072\u3068\u3064\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u306f\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u304c2\u5217\u306b\u4e26\u3093\u3067\u304a\u308a\u3001\u3053\u308c\u3089\u306e\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u306f2\u679a\u306e\u96fb\u5b50\u56de\u8def\u3092\u7528\u3044\u30661\u5217\u305a\u3064\u5236\u5fa1\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u52d5\u753b\u3067\u306f1\u5217\u5206\uff0828\u500b\uff09\u306e\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u3092\u540c\u6642\u306b\u52d5\u304b\u3057\u3066\u3044\u307e\u3059\u3002\u4eca\u5f8c\u306f\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u306b\u30d5\u30a1\u30a4\u30d0\u30fc\u304c\u53d6\u308a\u4ed8\u3051\u3089\u308c\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

https:\/\/pfs.naoj.org\/blog\/wp-content\/uploads\/2017\/05\/cobra1st.mp4<\/a><\/video><\/div>\n

\u307e\u305f\u3001\u30b3\u30d6\u30e9\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u7d44\u307f\u7acb\u3066\u3068\u4e26\u884c\u3057\u3066\u3001\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u3092\u99c6\u52d5\u3059\u308b\u30bd\u30d5\u30c8\u306e\u958b\u767a\u3082\u9032\u884c\u4e2d\u3067\u3059\u3002\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306fNASA\u30b8\u30a7\u30c3\u30c8\u63a8\u9032\u7814\u7a76\u6240\uff08JPL\uff09\u306e\u30c1\u30fc\u30e0\u304c\u958b\u767a\u3057\u3066\u3044\u307e\u3059\u3002\u8996\u91ce\u5185\u306b\u3042\u308b\u5929\u4f53\u3092\u9688\u306a\u304f\u89b3\u6e2c\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u500b\u3005\u306e\u30d5\u30a1\u30a4\u30d0\u30fc\u304c\u52d5\u304f\u3053\u3068\u306e\u3067\u304d\u308b\u300e\u30d1\u30c8\u30ed\u30fc\u30eb\u9818\u57df\u300f\u306f\u96a3\u308a\u5408\u3046\u30d5\u30a1\u30a4\u30d0\u30fc\u540c\u58eb\u3067\u50c5\u304b\u306b\u91cd\u306a\u308a\u5408\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u70ba\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u30d5\u30a1\u30a4\u30d0\u30fc\u540c\u58eb\u304c\u885d\u7a81\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3069\u306e\u3088\u3046\u306b\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u3092\u52d5\u304b\u305b\u3070\u885d\u7a81\u306e\u78ba\u7387\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3001\u307e\u305f\u3001\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u304c\u76ee\u6a19\u4f4d\u7f6e\u306b\u52b9\u7387\u3088\u304f\u53ce\u675f\u3059\u308b\u306b\u306f\u3069\u306e\u3088\u3046\u306b\u8f03\u6b63\u3092\u884c\u3046\u3079\u304d\u304b\u306a\u3069\u306e\u8b70\u8ad6\u3092\u7a4d\u307f\u91cd\u306d\u306a\u304c\u3089\u958b\u767a\u3092\u9032\u3081\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u306e\u52d5\u304d\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3057\u3001\u885d\u7a81\u306e\u50be\u5411\u3068\u5bfe\u7b56\u3092\u8abf\u3079\u305f\u308a\u3082\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\"\"
\n<\/a>\uff08\u5de6\u304b\u3089\uff1a\u300e\u30b3\u30d6\u30e9\u300f\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u3064\u3044\u3066\u8b70\u8ad6\u3092\u884c\u3046NASA\u30b8\u30a7\u30c3\u30c8\u63a8\u9032\u6240\u306e\u30e8\u30cf\u30cd\u30b9\u30fb\u30b0\u30ed\u30b9\u8077\u54e1\u3068\u30ab\u30ea\u30d5\u30a9\u30eb\u30cb\u30a2\u5de5\u79d1\u5927\u5b66\u306e\u30c0\u30f3\u30fb\u30ec\u30a4\u30ea\u30fc\u8077\u54e1\uff09<\/em><\/p>\n

\u5b8c\u6210\u3057\u305f\u30b3\u30d6\u30e9\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u3001\u4e3b\u7126\u70b9\u88c5\u7f6e\u306e\u7d71\u5408\u30fb\u8a66\u9a13\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u53f0\u6e7e\u306eASIAA\u306b\u8f38\u9001\u3055\u308c\u3001\u5149\u5b66\u30d9\u30f3\u30c1\u3078\u53d6\u308a\u4ed8\u3051\u3089\u308c\u3001\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u88c5\u7f6e\u306e\u5185\u90e8\u306b\u53d6\u308a\u307e\u308f\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u7d048m\u3042\u308b\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u3001\u30d5\u30a1\u30a4\u30d0\u30fc\u3084\u4ed6\u306e\u90e8\u5206\u3092\u50b7\u4ed8\u3051\u306a\u3044\u69d8\u306b\u6c17\u3092\u4ed8\u3051\u306a\u304c\u3089\u72ed\u3044\u4e3b\u7126\u70b9\u88c5\u7f6e\u5185\u306b\u7d44\u307f\u4e0a\u3052\u3066\u3044\u304b\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002\u305d\u306e\u70ba\u3001ASIAA\u3067\u306f\u5b9f\u5bf8\u5927\u306e\u6a21\u578b\u3092\u4f5c\u308a\u3001\u7d44\u307f\u4ed8\u3051\u306e\u7df4\u7fd2\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\"\"<\/a>\uff08\u30b3\u30d6\u30e9\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5b9f\u5bf8\u5927\u6a21\u578b\uff09<\/p>\n

\"\"
\n<\/a>\uff08\u30b3\u30d6\u30e9\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u7d44\u307f\u4ed8\u3051\u306e\u7df4\u7fd2\u306e\u69d8\u5b50\u3002\u307e\u3063\u3059\u3050\u7d44\u307f\u7acb\u3066\u308b\u305f\u3081\u306b\u30ac\u30a4\u30c9\u3092\u4f7f\u3046\u3002\u5de6\u304b\u3089\uff1a\u4e2d\u592e\u7814\u7a76\u9662\u5929\u6587\u53ca\u5929\u6587\u7269\u7406\u7814\u7a76\u6240\u306e\u9673\u5fc3\u8e8d (\u30c1\u30a7\u30f3 \u30b7\u30f3\u30e8\u30a6) \u6280\u8853\u8077\u54e1\u3001\u5f35\u852d\u660c (\u30c1\u30e7\u30a6 \u30a4\u30f3\u30c1\u30e3\u30f3)\u6280\u8853\u8077\u54e1\u3001\u738b\u7965\u5b87 (\u30ef\u30f3 \u30b7\u30e3\u30f3\u30e6\u30fc) \u6559\u6388\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"

PFS instrument catches light from about 2400 astronomical objects using fibers paved on the focal plane at the prime focus of the Subaru telescope, and each fiber is positioned by 2-staged actuator called “Cobra” (). As talked in the previous posts, 57 assemblies of Cobra positioners and fibers are integrated to one module, which is mounted to the optical bench…. Read more »<\/a><\/p>\n","protected":false},"author":3,"featured_media":482,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"","_original_post":"","footnotes":""},"categories":[2],"tags":[6,10],"class_list":["post-462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-cobra","tag-pfi","en-US"],"_links":{"self":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts\/462","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/comments?post=462"}],"version-history":[{"count":17,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts\/462\/revisions"}],"predecessor-version":[{"id":625,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/posts\/462\/revisions\/625"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/media\/482"}],"wp:attachment":[{"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/media?parent=462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/categories?post=462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pfs.naoj.org\/blog\/wp-json\/wp\/v2\/tags?post=462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}