Wopat píše:Pochopil jsem správně, že bude panel umístěn na modulu Leonardo? Bude nutné kvůli němu provést EVA např. kvůli propojení měřícího, komunikačního a dalšího vybavení se stanicí?
Pokud jsem správně pochopil popis průbehu tohoto experimentu, tak ROSA bude robotickou paží vytažena z trunku Dragona a dočasně umístěna na ELC. Až přijde čas experimentu, manipulátor s Dextrem sbalený panel vyzvedne a po celou dobu testu, tj. 7 dní, jej bude držet "v ruce" - nedojde k žádnému připojení k modulům stanice. Dextre bude s rozbaleným panelem dokonce "mávat", přičemž se budou sledovat dynamické vlastnosti této struktury. Jestli potom rolovací panel jen tak upustí a ten zanikne v atmosféře, a nebo ho rozbalený zase upne na ELC, to jsem se zatím nikde nedočetl. Výstup astronautů podle mého nebude potřeba, ale ruku do ohně za to nedám.
Operational Requirements and Protocols
ROSA is stowed in the trunk of the SpaceX’s Dragon capsule during launch. Once on orbit, the ISS robotic arm removes ROSA from the Dragon trunk and temporarily stows it on an ELC. When ROSA operations are ready to begin, the ROSA is picked up by the ISS robotics arm and located in its operations location. The ROSA operations are conducted while attached to the SSRMS/SPDM for a duration of 7 days. During initial deployment of the array, video is required. Data are recorded using embedded sensors on the experiment. Testing is activated and commanded via the ground controllers (ROBO). Payload Health and Status and Experiment Data are downlinked via 1553 communications.
Deployment is monitored by cameras, limit switches, eddy current damper voltage, and accelerometers placed on the tip of the mandrel and the blanket. Visual markers are placed on the booms, blanket, and tip mandrel to provide a visual index of array deployed length. These same markers are used during the dynamics testing to infer the fundamental frequency and associated mode shape through post-processing. A sinusoidal actuation at the array root with a motor will sweep across a frequency range at various rates. The dynamic response is measured via accelerometers on the mandrel and ROSA dynamics response is further characterized during thermally induced impulse loading due to eclipse exit.
The blanket and photovoltaic performance are measured by collecting current-voltage (I-V) sweeps from near the open circuit voltage to near the short circuit current. Sweeps are performed approximately every two minutes for the duration of the mission. Temperature, sun angle and shadowing are measured in order to correlate the measured I-V data.
