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Orion Capsule Parachute Assembly System (CPAS) Main and Drogue Canopy InstrumentationReefing systems are often used in parachute systems to control loading and inflation of the canopies. These systems typically use pyrotechnic cutters to sever lines to progress through the staging. Existing cutters have been used for more than 50 years and have been proven adequate through countless demands. These cutters must survive and operate through severe environments that include a large snatch load at deployment and random vibration through the stage. In lieu of extensive drop test campaigns, future cutters will need to be ground tested to environments which are representative of the flight environments. The Capsule Parachute Assembly System (CPAS) developed sensors that capture accelerations and rates in three axes at approximately 1500 Hertz (Hz) during parachute deployment and operation. These sensors have mass properties, size, and an attachment method similar to existing reefing line cutter assemblies, maximizing the usability of the data. Various risk reduction steps were taken to minimize any negative effects to the qualification parachute system and to increase the likelihood of collecting usable data. 24 sensors were flown on 12 qualification parachutes, successfully collecting sufficient data to characterize the deployment and operational environment of the reefing line cutters.
Document ID
Document Type
Conference Paper
Daum, Jared S. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
June 19, 2019
Publication Date
June 17, 2019
Subject Category
Spacecraft Instrumentation and Astrionics
Report/Patent Number
Meeting Information
AIAA Aviation and Aeronautics Forum (Aviation 2019)(Dallas, TX)
Distribution Limits
Work of the US Gov. Public Use Permitted.
Technical Review
Single Expert

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