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NASA-LLIS-0274 : Lessons Learned – Mars Observer Payload Data System (PDS) Exposure to Low Temperature

سازمان: NASA - National Aeronautics and Space Administration (NASA)

کلید واژه: Environment , Test & Verification

سال: 1993

زبان: English

قیمت: 55000 تومان

Array افزودن به سبد خرید

Abstract:
During thermal vacuum testing of the flight Mars Observer PDS, the subsystem was exposed to a temperature of about -47 degrees Celsius, well below the desired limit of -20 degrees C. The problem was caused by a failure in a temperature controller and was compounded by a chamber operator evaluation error.
The recommendations involve use of alarm and "fail safe" circuits, pretest functional verification of the test facility, procedures required before manual override of "fail safe" devices, and continuous quality assurance monitoring of tests.