Mon. Oct 18th, 2021


The naval module (left) is docked at ISS, with a Soyuz spacecraft (right) parked nearby.

The naval module (left) is docked at ISS, with a Soyuz spacecraft (right) parked nearby.
Pictures: Roscosmos

Russian astronauts on the International Space Station are continuing to try to solve a problem The newly arrived naval module inadvertently fires its thrusters after docking at the orbital outpost.

The situation seems to be under control now, but, For 47 minutes yesterday, Got things Strange And even a little scary.

At about 12:34 EDT, about three hours after docking at ISS, the newly arrived Multipurpose Laboratory Module (MLM), or Noka, began firing its thrusters. ISS Program Manager Joel Montalbano explained at a NASA press briefing yesterday that as a result of this unexpected persuasion, the station lost control of its attitude, causing it to move at a rate of about half a degree per second. All in all, the astonishing increase caused the space station to move about 45 degrees, mostly on the pitch.

Russian flight controllers responded by shutting down the boat’s thruster. The Zvezda module and a docked progress cargo ship thruster then bring the space station back to its normal position. At 1:29 p.m. EDT, attitude returns to control, NASA said.

“At the moment, the station is in its normal direction, all ISS and MAltiparus laboratory module systems are working normally. Statement. “A reliable internal power and command interface was created, as well as a power supply interface that connected the module to the station.”

NASA says the ISS Expedition 65 crew has never been in danger and no damage has been reported. Montalbano said he was not “too worried” about the incident, adding that the mission controllers were thorough. Trained for such situations. Repetition is no longer possible, he added, adding that the naval thruster was “blocked” by Russian controllers.

“This is one of the deadliest events in the 24-year history of the ISS,” wrote Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics. In an email to me. “In principle there is a risk of the complex collapsing if the attitude loses control.”

McDowell 201. Indicated the year Events Where the Japanese Hitomi satellite, after experiencing problems with its attitude control system, enters an uncontrolled spin, causing it to break. He said the ISS situation was “not so extreme”, and the ISS “probably did not face any structural failure,” McDowell wrote, “but you don’t want tons of tons of stations with large flexible parts. Solar arrays seem to be falling apart.”

McDowell said he was only concerned about the condition of some external tests connected by cable ties. The “fight” between Noka and other modules for control – where multiple sets of thrusters were employed – could be placed on flexible parts of the structure, especially the “radiator and solar array” cradle, so that design tolerance could be overcome, he wrote.

Sloviov said a “short-term software failure” was responsible for the crash, where “the direct command was incorrectly launched to withdraw the module’s engines, which altered some of the complex’s orientation as a whole.”

As a result of this inadvertent thruster firing, NASA has postponed today’s date. Scheduled launch of the scheduled Boeing CST-100 Starliner commercial crew vehicle. The second test of this car is now Listed For August 3 at 1:20 pm EDT. The suspension “allows the International Space Station team to continue working on the workout of the newly arrived Roscosmos Nook module and to ensure that the station is ready for the arrival of the Starliner,” NASA said. Statement. Sure – sending a test spacecraft to the ISS doesn’t make much sense when crews have to deal with a serious situation.

With the crew’s attitude back under control, mission experts are now trying to determine how much propellant was lost by the ISS. Montalbano said the method did not deplete the station’s fuel reserves, but that it was “obviously more propellant than we wanted but not something I’m worried about.”

Russian astronauts are now working on a mechanism to ensure the “unconditional security” of the ISS and its crew, especially those related to the naval module propulsion system. Statement. Once this is done, The crew will open the hatches, first the Zevezda service module and then the new Russian module. The astronauts will “open the hatches, enter the modules, turn on the necessary means to purify the atmosphere, and begin normal regular work,” Sloviov said. They have to balance the pressure on the naval module, it will take some time, Since the total volume of the module includes 2,472 cubic feet (70 cubic meters).

Boat Module On July 21 from Baikonur Cosmodrome, but its initial thruster burn Failed, Forcing flight controllers to use the backup engine. Concerned about a weird antenna and docking port Complex More important, but the module is docked. “NominallyEDT with ISS on July 29th at 9:29 am.

The new module will provide additional space for running tests, storing cargo and storing new water and oxygen regeneration equipment. The boat is a second toilet for Russian crew and an additional room for a third Russian crew member. The module has a new airlock and new delivery European robotic arm (ERA), which will be the first robotic arm for the Russian segment.

More: The robotic arm is moving towards the International Space Station like an inspector gadget.



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