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NASA-LLIS-1412
Lessons Learned – Plasma Arcs from Pyro Firing May Cause Prolonged NSI Shorts (2003)
Year: 2004
Abstract: Abstract:
NSI firing circuit design has not previously taken into account the high probability of plasma shorts and subsequent hard-shorting, as seen during testing on MER, which allowed ground (chassis) return current during pyrotechnic events. Mars Exploration Rover experience has shown that molten NSI fragments can cause a prolonged NSI pin-to-case short that can damage flight hardware. Thirteen design, analysis, inspection, and test recommendations in the areas of Parts Selection and Reliability Analysis, Power/Pyro Design, and System Grounding are offered to account for this possibility.
NSI firing circuit design has not previously taken into account the high probability of plasma shorts and subsequent hard-shorting, as seen during testing on MER, which allowed ground (chassis) return current during pyrotechnic events. Mars Exploration Rover experience has shown that molten NSI fragments can cause a prolonged NSI pin-to-case short that can damage flight hardware. Thirteen design, analysis, inspection, and test recommendations in the areas of Parts Selection and Reliability Analysis, Power/Pyro Design, and System Grounding are offered to account for this possibility.
Subject: cable cutter
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:19:43Z | |
| date available | 2017-09-04T16:19:43Z | |
| date copyright | 04/19/2004 | |
| date issued | 2004 | |
| identifier other | TIWEQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/83140 | |
| description abstract | Abstract: NSI firing circuit design has not previously taken into account the high probability of plasma shorts and subsequent hard-shorting, as seen during testing on MER, which allowed ground (chassis) return current during pyrotechnic events. Mars Exploration Rover experience has shown that molten NSI fragments can cause a prolonged NSI pin-to-case short that can damage flight hardware. Thirteen design, analysis, inspection, and test recommendations in the areas of Parts Selection and Reliability Analysis, Power/Pyro Design, and System Grounding are offered to account for this possibility. | |
| language | English | |
| title | NASA-LLIS-1412 | num |
| title | Lessons Learned – Plasma Arcs from Pyro Firing May Cause Prolonged NSI Shorts (2003) | en |
| type | standard | |
| page | 7 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2004 | |
| contenttype | fulltext | |
| subject keywords | cable cutter | |
| subject keywords | Energetic Materials - Explosive/Propellant/Pyrotechnic | |
| subject keywords | Flight Equipment | |
| subject keywords | Ground Operations | |
| subject keywords | Hardware | |
| subject keywords | Parts Materials & Processes | |
| subject keywords | Payloads | |
| subject keywords | pin-puller | |
| subject keywords | Safety & Mission Assurance | |
| subject keywords | smart NSI | |
| subject keywords | sneak circuit | |
| subject keywords | Spacecraft | |
| subject keywords | Test & Verification | |
| subject keywords | Test Article | |
| subject keywords | test-induced failure |