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NASA-LLIS-0343
Lessons Learned - Mars Observer Inappropriate Fault Protection Response Following Contingency Mode Entry due to a Postulated Propulsion Subsystem Breach
Year: 1994
Abstract: Abstract:
Following the loss of the Mars Observer spacecraft, simulations showed that a postulated propellant breach would have caused angular accelerations that could have inhibited downlink and caused multiaxis gyro saturation. In this case, fault protection features of flight software would have inhibited all momentum unloading and prevented the stabilization of the spacecraft.
Ensure that fault protection takes proper action regardless of spacecraft state. Fault responses should not be allowed to interrupt critical activities.
Following the loss of the Mars Observer spacecraft, simulations showed that a postulated propellant breach would have caused angular accelerations that could have inhibited downlink and caused multiaxis gyro saturation. In this case, fault protection features of flight software would have inhibited all momentum unloading and prevented the stabilization of the spacecraft.
Ensure that fault protection takes proper action regardless of spacecraft state. Fault responses should not be allowed to interrupt critical activities.
Subject: Attitude Control
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:39:23Z | |
| date available | 2017-09-04T18:39:23Z | |
| date copyright | 09/29/1994 | |
| date issued | 1994 | |
| identifier other | JSAEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsessionid=22E9669814B1A2CD62B816A309F4CAB6/handle/yse/221065 | |
| description abstract | Abstract: Following the loss of the Mars Observer spacecraft, simulations showed that a postulated propellant breach would have caused angular accelerations that could have inhibited downlink and caused multiaxis gyro saturation. In this case, fault protection features of flight software would have inhibited all momentum unloading and prevented the stabilization of the spacecraft. Ensure that fault protection takes proper action regardless of spacecraft state. Fault responses should not be allowed to interrupt critical activities. | |
| language | English | |
| title | NASA-LLIS-0343 | num |
| title | Lessons Learned - Mars Observer Inappropriate Fault Protection Response Following Contingency Mode Entry due to a Postulated Propulsion Subsystem Breach | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1994 | |
| contenttype | fulltext | |
| subject keywords | Attitude Control | |
| subject keywords | Hardware | |
| subject keywords | Safety & Mission Assurance | |
| subject keywords | Sequence Interaction | |
| subject keywords | Software | |
| subject keywords | Spacecraft |