درباره ما
NASA-LLIS-2045
Lessons Learned – Failure of Pyrotechnic Operated Valves with Dual Initiators
Year: 2009
Abstract: Abstract:
Four spacecraft propulsion system pyrovalve no-fire failures were investigated by the NESC (NASA Engineering and Safety Center). In all four cases, a normally closed pyrovalve failed to actuate during tests in which simultaneous firing of dual initiators failed to ignite the booster charge. Timing of redundant initiator firings is crucial for reliable operation of pyrovalves. Dual simultaneous firing (less than 10 microseconds skew) is not as robust as a single firing and should be avoided.
Four spacecraft propulsion system pyrovalve no-fire failures were investigated by the NESC (NASA Engineering and Safety Center). In all four cases, a normally closed pyrovalve failed to actuate during tests in which simultaneous firing of dual initiators failed to ignite the booster charge. Timing of redundant initiator firings is crucial for reliable operation of pyrovalves. Dual simultaneous firing (less than 10 microseconds skew) is not as robust as a single firing and should be avoided.
Subject: Additional Categories.Energetic Materials - Explosive/Propellant/Pyrotechnic
Show full item record
| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:32:17Z | |
| date available | 2017-09-04T16:32:17Z | |
| date copyright | 05/11/2009 | |
| date issued | 2009 | |
| identifier other | UQYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/95687 | |
| description abstract | Abstract: Four spacecraft propulsion system pyrovalve no-fire failures were investigated by the NESC (NASA Engineering and Safety Center). In all four cases, a normally closed pyrovalve failed to actuate during tests in which simultaneous firing of dual initiators failed to ignite the booster charge. Timing of redundant initiator firings is crucial for reliable operation of pyrovalves. Dual simultaneous firing (less than 10 microseconds skew) is not as robust as a single firing and should be avoided. | |
| language | English | |
| title | NASA-LLIS-2045 | num |
| title | Lessons Learned – Failure of Pyrotechnic Operated Valves with Dual Initiators | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2009 | |
| contenttype | fulltext | |
| subject keywords | Additional Categories.Energetic Materials - Explosive/Propellant/Pyrotechnic | |
| subject keywords | Additional Categories.Hardware | |
| subject keywords | Additional Categories.Spacecraft |