1、Lessons Learned Entry: 1728Lesson Info:a71 Lesson Number: 1728a71 Lesson Date: 2006-04-25a71 Submitting Organization: MSFCa71 Submitted by: LIsa Carra71 POC Name: Robert Lightfoota71 POC Email: Robert.M.Lightfootnasa.gova71 POC Phone: 256-544-2255Subject: Space Shuttle - Designing Environments Tests
2、 for Sustainability Abstract: In support of foam redesign options, ET project was required to repeat wind tunnel testing for revised environments. Because data on the original test configuration was sketchy, due in part to the lack of digital storage technology at the time of the original test, this
3、 was a difficult and costly process.Description of Driving Event: In performing recent foam redesigns, External Tank (ET) identified a need for additional wind tunnel testing to anchor Computational Flow Dynamics (CFD) models for new environments and boundary conditions. The process of duplicating t
4、he original test conditions was difficult and expensive, since the original test articles were limited and the information about the original test article configuration and test set-up was difficult to recover.Lesson(s) Learned: Environments testing should be designed to address the full range of ex
5、pected environments and boundary conditions and should anchor models in a comprehensive manner because reproducing tests later in the lifecycle can be difficult and expensive.Recommendation(s): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- Anchor
6、analytical models early in the project lifecycle, with real test data that accurately reflects all expected environments and boundary conditions. - Preserve test articles for potential re-use, should additional testing be required later in lifecycle. - Preserve information on test article configurat
7、ion, test set-up, and unreduced test data in a format that is easy to recall should the project require additional testing or analysis later in the lifecycle. Evidence of Recurrence Control Effectiveness: This lesson is submitted for the benefit of CLV and future vehicle projects.Documents Related t
8、o Lesson: N/AMission Directorate(s): a71 Exploration SystemsAdditional Key Phrase(s): a71 Program Management.a71 Program Management.Risk managementa71 Missions and Systems Requirements Definition.a71 Missions and Systems Requirements Definition.Requirements critical to costing and cost credibilitya7
9、1 Systems Engineering and Analysis.a71 Systems Engineering and Analysis.Long term sustainability and maintenance planninga71 Engineering Design (Phase C/D).a71 Engineering Design (Phase C/D).Propulsiona71 Manufacturing and Assemblya71 Integration and Testinga71 Safety and Mission Assurance.a71 Safet
10、y and Mission Assurance.Early requirements and standards definitiona71 Additional Categories.a71 Additional Categories.Launch VehicleAdditional Info: a71 Project: Space Shuttle, CLV, Other space vehicles & launch systemsProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 2006-12-06a71 Approval Name: ghendersona71 Approval Organization: HQProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
