ULDB MSR Ballooncraft Integration and Test ULDB Ballooncraft
ULDB MSR Ballooncraft Integration and Test ULDB Ballooncraft Integration & Test David Stuchlik 820/Balloon Program Office (757) 824 -1115 david. w. stuchlik@nasa. gov February 4, 2004 1
I&T Status ULDB MSR • CDM Status • All Phase IV testing completed – With exception of OTH Termination regression • January Activities Ballooncraft Integration and Test – Phase 4 completed on redesigned ballast valve relay board – Phase 4 completed on Flight Software (post test analysis) – Phase 4 completed on UTP • NSBF personnel traveled to WFF and verified – Phase 4 completed on Power System on 2/5 February 4, 2004 2
I&T Status ULDB MSR Ballooncraft Integration and Test • CDM Status • January Problem Resolution/Schedule Hits – Temperature & Humidity in High Bay • External heater and clean tent – Burning up relays – electronic load setting • Changed load setting – Wrong type relays – no suppression diodes • Swap out all discrete cmd relay driver chips and rewired to use suppression diodes in chips – BUCD/stack intermittent communications • Attributed to start-up voltage profile – OTH Termination relay driver anomaly • Resolution Pending February 4, 2004 3
I&T Status ULDB MSR Ballooncraft Integration and Test February 4, 2004 4
I&T Schedule ULDB MSR Ballooncraft Integration and Test • February & March Activities – Resolve Engineering Issues and finish odds & ends • OTH relay driver, HGA current, Pressure transducers, heaters and thermostats – Complete initial Phase V tests • Analog & Digital Input Calibration and Verification, Command Verification, End to End Subsystem Tests – Complete above by 2/25, regression on 2/26 – Perform CPT/LPT/EMI 2/27 – 3/8 – Prep and Perform T/V 3/9 – 3/24 – Schedule through April 1 has 6 work days contingency plus 6 Saturdays February 4, 2004 5
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