REG NASA-LLIS-0630-1999 Lessons Learned Space Flight Thermal Test Considerations.pdf

1、Lessons Learned Entry: 0630Lesson Info:a71 Lesson Number: 0630a71 Lesson Date: 1999-07-20a71 Submitting Organization: ARCa71 Submitted by: Dave ZimmerSubject: Space Flight Thermal Test Considerations Description of Driving Event: When performing ground based functional testing of space flight hardwa

2、re, it is difficult to perform accurate thermal testing. This is because natural hot air convection is present during ground based testing, and it is not a factor in the microgravity environment of space flight.There have been several instances where this factor has been forgotten and where the resu

3、ltant thermal testing was not representative of the in-flight conditions.Lesson(s) Learned: When performing ground based thermal testing of space flight hardware, care has to be taken to remove the effect of natural hot air convection.One of the most practical ways to accomplish this is to perform t

4、he thermal tests in an oven or thermal chamber where the overall environmental temperature can be raised to be the maximum temperature allowable. In this way, the effect (both heat load and performance) of the hardware being tested can be identified and evaluated.Recommendation(s): See lesson(s) lea

5、rned.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): a71 Exploration Systemsa71 Sciencea71 Aeronautics ResearchAdditional Key Phrase(s): a71 Flig

6、ht Equipmenta71 Hardwarea71 Payloadsa71 Research & Developmenta71 Safety & Mission Assurancea71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 1999-08-02a71 Approval Name: Anthony Bricenoa71 Approval Organization: N244-30a71 Approval Phone Number: 415-604-1012Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-