1、Lessons Learned Entry: 0284Lesson Info:a71 Lesson Number: 0284a71 Lesson Date: 1993-07-12a71 Submitting Organization: JPLa71 Submitted by: B. LarmanSubject: In-Flight Spacecraft Fault Recovery Abstract: Voyager 2 suffered two potentially mission-catastrophic in-flight faults that were recoverable du
2、e to the availability of spare spacecraft hardware that was used to test workaround solutions. Maintain a functionally identical, properly configured, test bed of spare spacecraft hardware and associated support equipment, enabling detailed analysis of in-flight faults and candidate corrective actio
3、ns.Description of Driving Event: During the prime Voyager mission, Voyager 2 suffered two potentially mission-catastrophic faults. These were: 1) failure of the spacecraft receiver plus significant degradation in the signal acquisition capability of the redundant spacecraft receiver, and 2) the azim
4、uth scan platform actuator ceased operation. A significant contribution to the successful recovery from these faults was the availability of spare spacecraft hardware and associated support equipment, which was used to simulate postulated failures plus evaluate and validate proposed solutions and wo
5、rkaround procedures. The specific details of the corrections and workarounds are described in the paper entitled “Voyager Engineering Improvements for Uranus Encounter“ by Howard P. Marderness.Additional Keyword(s): Mission OperationsLesson(s) Learned: The availability of spare spacecraft hardware a
6、nd associated ground support equipment can mean the difference between restoring a lost spacecraft capability or flying with a reduced or lost capability due to the inability to adequately correct a fault.Recommendation(s): Provided by IHSNot for ResaleNo reproduction or networking permitted without
7、 license from IHS-,-,-Maintain a functionally identical, properly configured, test bed of spare spacecraft hardware and associated support equipment, enabling detailed analysis of suspected causes of in-flight faults and validation of proposed corrective actions or workarounds.Evidence of Recurrence
8、 Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Risk Management/AssessmentAdditional Info: Approval Info: a71 Approval Date: 1986-09-11a71 Approval Name: Carol Dumaina71 Approval Organization: 125-204a71 Approval Phone Number: 818-354-8242Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
