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Proton-M Rocket Downed by Reversed Sensors

proton-m roscosmos

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#1    Waspie_Dwarf

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Posted 18 July 2013 - 04:05 PM

Proton-M Rocket Downed by Reversed Sensors – Roscosmos


RIA Novosti said:

MOSCOW, July 18 (RIA Novosti) – A Russian Proton-M rocket that exploded after launch on July 2 was lost because its angular velocity sensors were installed upside-down, the country’s space agency said Thursday.

The mistake affected three of six yaw angular velocity sensors on the unmanned rocket, said deputy head of Roscosmos, Alexander Lopatin, citing a state commission’s investigation of the crash.


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#2    keithisco

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Posted 18 July 2013 - 04:22 PM

I just dont believe this... Inertial Sensors for Roll, Pitch, and Yaw are exhaustively tested both at the device level, the sub assembly level, and the System level. As are the gyroscopic sensors. Velocity is determined by Accelerometers, Yaw sensors only detect changes in rotational vector velocity, and having them upside down should be easy to detect, and would only result in a rotational moment being interpreted as a need to  rotate through the opposite plane.

IMO only, I would suspect the software having the wrong "Sign".

Edited by keithisco, 18 July 2013 - 04:24 PM.


#3    Waspie_Dwarf

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Posted 18 July 2013 - 06:05 PM

I don't claim to be any sort of expert in this, but surely if 3 of the 6 yaw angular velocity sensors were giving incorrect readings there would be conflicting signals being sent to the guidance computer. If that is the case I don't see that software would need to be at fault.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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