{"id":46,"date":"2000-12-13T15:12:30","date_gmt":"2000-12-13T15:12:30","guid":{"rendered":"https:\/\/satelit.cz\/?p=46"},"modified":"2000-12-13T15:12:30","modified_gmt":"2000-12-13T15:12:30","slug":"druzice-ao-40-ma-problemy","status":"publish","type":"post","link":"https:\/\/satelit.cz\/?p=46","title":{"rendered":"Dru\u017eice AO-40 m\u00e1 probl\u00e9my !"},"content":{"rendered":"

Podle informac\u00ed organizace AMSAT<\/a> m\u00e1 dru\u017eice AO-40 probl\u00e9my se stabilizac\u00ed polohy na ob\u011b\u017en\u00e9 dr\u00e1ze. V pond\u011bl\u00ed ve\u010der nedo\u0161lo k pl\u00e1novan\u00e9mu z\u00e1\u017eehu 400 N motoru a bylo nutno p\u0159ijmout provizorn\u00ed opat\u0159en\u00ed !
\nJsou to p\u0159ibli\u017en\u011b \u010dty\u0159i t\u00fddny od startu nejmodern\u011bj\u0161\u00ed radioamat\u00e9rsk\u00e9 komunika\u010dn\u00ed dru\u017eice AO-40, kter\u00e1 nab\u00edz\u00ed cel\u00e9mu radioamat\u00e9rsk\u00e9mu sv\u011btu nej\u0161ir\u0161\u00ed mo\u017enosti dru\u017eicov\u00e9 komunikace. Ihned po vypu\u0161t\u011bn\u00ed byl indikov\u00e1n probl\u00e9m na 70 cm vys\u00edla\u010di a palubn\u00ed telemetrie musela b\u00fdt nastavena na p\u00e1smo 2m. P\u0159ibli\u017en\u011b o dva t\u00fddny pozd\u011bji byly otestov\u00e1ny dva 23cm vys\u00edlac\u00ed moduly, kter\u00e9 p\u0159\u00edle\u017eitostn\u011b vys\u00edlaj\u00ed telemetrii tak\u00e9 v S p\u00e1smu. Bohu\u017eel prozat\u00edm nen\u00ed dostate\u010dn\u011b stabilizov\u00e1na poloha dru\u017eice a proto je sign\u00e1l v S p\u00e1smu velmi slab\u00fd.
Hlavn\u00ed aktivita minul\u00e9ho t\u00fddne sm\u011b\u0159ovala k p\u0159ipraven\u00ed satelitu k prvn\u00edmu pl\u00e1novan\u00e9mu z\u00e1\u017eehu 400N motoru. Bylo pot\u0159eba nastavit polohu satelitu proti rychlostn\u00edmu vektoru v perigeu a rotace pot\u0159ebn\u00e1 pro z\u00e1\u017eeh by m\u011bla b\u00fdt 9 ot\u00e1\u010dek za minutu. V d\u016fsledku toho bylo nutn\u00e9 odsunout diagnostiku nefunk\u010dn\u00edho UHF transpond\u00e9ru na dobu po z\u00e1\u017eehu. Technick\u00fd t\u00fdm kolem dru\u017eice m\u011bl toti\u017e p\u0159ed sebou \u0159adu probl\u00e9m\u016f, kter\u00e9 bylo t\u0159eba p\u0159ed z\u00e1\u017eehem vy\u0159e\u0161it. Proto\u017ee se dru\u017eice nach\u00e1zela v na nep\u0159\u00edzniv\u00e9 dr\u00e1ze nebylo mo\u017eno v pln\u00e9 m\u00ed\u0159e korigovat dr\u00e1hu dru\u017eice pomoc\u00ed palubn\u00edho motoru na principu magnetick\u00e9ho pole. K vy\u0159e\u0161en\u00ed tohoto probl\u00e9mu bylo t\u0159eba naj\u00edt vhodn\u00e9 nastaven\u00ed palubn\u00edho po\u010d\u00edta\u010de. Dal\u0161\u00ed probl\u00e9my byly tak\u00e9 zp\u016fsobeny \u010dast\u00fdmi v\u00fdpadky prvn\u00edho palubn\u00edho po\u010d\u00edta\u010de, kter\u00e9 zp\u016fsobily poruchy v d\u016fsledku z\u00e1\u0159en\u00ed. V ned\u011bli ve\u010der se v\u0161ak poda\u0159ilo dos\u00e1hnout spr\u00e1vn\u00e9 orientace a rotace pro z\u00e1\u017eeh 400N motoru, kter\u00fd m\u00e1 dopravit dru\u017eici na ob\u011b\u017enou dr\u00e1hu a apogeem 50 000 km. Z\u00e1\u017eeh byl napl\u00e1nov\u00e1n na apogeum obletu 50\/51 v nejni\u017e\u0161\u00ed v\u00fd\u0161ce (cca 600 km) a nastaven palubn\u00ed po\u010d\u00edta\u010d na automatick\u00fd start. (V t\u00e9to pozici nebylo dru\u017eici mo\u017eno manu\u00e1ln\u011b nav\u00e1d\u011bt, proto\u017ee nebyl kontakt s \u0159\u00edd\u00edc\u00edm centrem.
Dru\u017eice prol\u00e9tla perigeem ale nezm\u011bnila polohu<\/b>. P\u0159i n\u00e1sledn\u00e9 kontrole pam\u011bti po\u010d\u00edta\u010de, byly zji\u0161t\u011bny v\u0161echny pot\u0159ebn\u00e9 kroky pro z\u00e1\u017eeh, ale ten se neuskute\u010dnil v d\u016fsledku nedostate\u010dn\u00e9ho tlaku helia pro otev\u0159en\u00ed palivov\u00fdch ventil\u016f. N\u00e1sledn\u011b prob\u011bhla kompletn\u00ed anal\u00fdza probl\u00e9mu a do\u0161lo k n\u00e1prav\u011b probl\u00e9mu s tlakem. Dal\u0161\u00ed z\u00e1\u017eeh byl napl\u00e1nov\u00e1n na pond\u011bln\u00ed ve\u010der. Tentokr\u00e1t motor za\u017eehl bez probl\u00e9m\u016f, ale podle telemetrick\u00fdch \u00fadaj\u016f b\u011b\u017eel pravd\u011bpodobn\u011b o 3 minuty d\u00e9le. V d\u016fsledku toho se dru\u017eice dostala na ob\u011b\u017enou dr\u00e1hu s apogeem p\u0159ibli\u017en\u011b 60 000 km. Tato v\u00fd\u0161ka v\u0161ak m\u016f\u017ee b\u00fdt dodate\u010dn\u011b korigov\u00e1na pomoc\u00ed magneto-elektrick\u00e9ho motoru. Na anal\u00fdze funkce motoru se st\u00e1le pracuje, ale jeho dal\u0161\u00ed pou\u017eit\u00ed nen\u00ed vylou\u010deno. V nejbli\u017e\u0161\u00edch dnech se neo\u010dek\u00e1vaj\u00ed \u017e\u00e1dn\u00e9 zm\u011bny dr\u00e1hy a proto bude mo\u017en\u00e9 hledat probl\u00e9m v UHF transpond\u00e9ru. B\u011bhem n\u011bkolika dn\u00ed se dozv\u00edme, zda s n\u00edm je\u0161t\u011b m\u016f\u017eeme po\u010d\u00edtat nebo ne.<\/p>\n

Zdroj : AMSAT<\/a><\/font><\/p>\n","protected":false},"excerpt":{"rendered":"

Podle informac\u00ed organizace AMSAT m\u00e1 dru\u017eice AO-40 probl\u00e9my se stabilizac\u00ed polohy na ob\u011b\u017en\u00e9 dr\u00e1ze. V pond\u011bl\u00ed ve\u010der nedo\u0161lo k pl\u00e1novan\u00e9mu z\u00e1\u017eehu 400 N motoru a bylo nutno p\u0159ijmout provizorn\u00ed opat\u0159en\u00ed ! Jsou to p\u0159ibli\u017en\u011b \u010dty\u0159i t\u00fddny od startu nejmodern\u011bj\u0161\u00ed radioamat\u00e9rsk\u00e9 komunika\u010dn\u00ed dru\u017eice AO-40, kter\u00e1 nab\u00edz\u00ed cel\u00e9mu radioamat\u00e9rsk\u00e9mu sv\u011btu nej\u0161ir\u0161\u00ed mo\u017enosti dru\u017eicov\u00e9 komunikace. Ihned po vypu\u0161t\u011bn\u00ed…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-46","post","type-post","status-publish","format-standard","hentry","category-radioamateri"],"_links":{"self":[{"href":"https:\/\/satelit.cz\/index.php?rest_route=\/wp\/v2\/posts\/46","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/satelit.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/satelit.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/satelit.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/satelit.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=46"}],"version-history":[{"count":0,"href":"https:\/\/satelit.cz\/index.php?rest_route=\/wp\/v2\/posts\/46\/revisions"}],"wp:attachment":[{"href":"https:\/\/satelit.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=46"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/satelit.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=46"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/satelit.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=46"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}