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Carol.scott Carol.scott Presentation Transcript

  • Constellation Space Transportation Planning Office Operability Program Management Challenge February 2010 Carol Scott Constellation Space Transportation Planning Office (CSTP) 1 Used with Permission
  • Operability for Constellation SystemConstellation Space Transportation Planning Office  Constellation Program has made progress toward operability during the early design phase of life cycle  Constellation Space Transportation Planning office developed Constellation Operability Advocacy Assessment.  Current State  Operability – Definition  Current Approaches  New Operability Efforts 2
  • Scope - OperabilityConstellation Space Transportation Planning Office  To have successful, safe, and cost effective mission execution:  “Performance” must be balanced with “Operability” in the system engineering design process  Therefore design engineers must consider:  How one part of the design solution effects the safe processing and operations of the system and the other portions of the total system engineering solution  How a design decision must be incorporated into the hardware/software through the stages of the lifecycle  How trades are made between technical design, design cost/schedule considerations, and operations cost/schedule considerations 3
  • Design Solution Example: Upper Stage Helium BottleConstellation Space Transportation Planning Office  Performance vs. Operability  I can gain performance by placing helium bottles inside cryogenic hydrogen tank, taking advantage of cold hydrogen, leading to smaller helium bottle.  How one part of the design solution effects the safe processing and operations of the system and the other portions of the total system engineering solution  Design Solution for helium bottle location for Upper Stage  Can the Upper Stage hydrogen cryogenic system operate sufficiently with helium bottles in Upper Stage, leaks?  What are production issues, ground processing issues, special flight operation procedures?  Added complexity to maintaining ullage pressure during flight?  How a design decision must be incorporated into the hardware/software through the stages of the lifecycle  Design solution evolution from PDR/CDR/ Production Operations and Sustaining  How trades are made between technical design, design cost/schedule considerations, and operations cost/schedule considerations  Helium bottle location in hydrogen tank vs. tank major structure  Structural loads for tank position  Design cost and schedule for each option  Operations sustaining cost and schedule for production, ground and flight 4
  • Current StateConstellation Space Transportation Planning Office  Operability – no common agency/program definition  Initial design trade studies focus on performance first.  Operability becomes a focus after vehicle performance requirements are established  Operability consequences of utilizing heritage hardware and infrastructure  Heritage facilities bring fixed constants affecting operability  Clean sheet will usually have fewer facilities  Heritage facilities have fixed capacities, may be more than CxP needs  Heritage facilities must concurrently accommodate CSTP production & operations and CxP modifications for lunar phase  Estimated Constellation production, sustaining and operations (Phase D&E of life cycle) costs are too high 5
  • Operability – DefinitionConstellation Space Transportation Planning Office  Operability is the summation the system characteristics (Producibility, Reliability, Interoperability, Sustainability, Maintainability) to ensure safe flight while minimizing fixed and variable costs during the Production, Operating and Sustaining Phases (Phase D & E) of the life cycle.  Producibility is the ease and economy with which a completed design can be fabricated, manufactured or coded into hardware/software products. (SP-6105 Dec 2007)  Reliability is robustness of system to be fault tolerant during Producibility Op its operating parameters and environment to safely achieve the Reliability erab mission Interoperability ilit (SP-6105 Dec 2007) y Sustainability  Interoperability is the ease of exchanging data between Maintainability design and operations tools for reduced human error and complexity of the integration tasks (SP-6105 Dec 2007) P + R SummationM = O +I+S+  Sustainability is upholding and supporting the configuration of the system through the operating life cycle.  Maintainability is the inherent characteristics of a design that contribute to the ease and economy to assemble, integrate, retain or restore the hardware/software to specified conditions safely and accurately (SP-6105 Dec 2007) OPhase D&E = OProduction + OGround + OFlight + OManagement Systems 6 SP-6105: NASA System Engineering Handbook Dec 2007
  • Current ApproachesConstellation Space Transportation Planning Office CxP Operability Evolution  Constellation Architecture Requirements Document (CARD): high level operability requirements  Constellation Operability Optimization List  Numerous examples for operability derived between Ground Operations and Flight Design projects  Ares Operability Assessment Team Established  Dozens of operability changes incorporated between Ares and Ground Operations projects during PDR cycle collaboration  Software and data architecture emphasizes moving from document management to data management  Cx program operations engineer position added to help identify key operations engineering activities throughout 2007 to present  Orion’s PDR included operability as emphasis area 7
  • Operability SuccessesConstellation Space Transportation Planning Office  Ares I/ Ground Ops  Adoption of mono-propellant systems for RoCS, ReCS and FS TVC  Commonality of commodity reduces processing hazards/loading timelines/maintenance cost  ReCS service panel relocation to OML for access ease  RoCS service panel relocation to I/S door area eliminates access arm  Interstage door relocation aligns for ReCS service panel and eliminates 2 separate access arms  Orion Production  Developed segmented Crew Module (CM) concept  Saves four months of AI&P schedule in the O&C  Top half the CM is welded after outfitting (Previous to this design the only access was via the hatch)  Implement cable harness wire identification  Ground Ops  VAB Platforms  New platforms selected over modified Shuttle allowing for optimal access  Separate VAB platform levels, not ganged platform assemblies, allow for individual platform operations reducing operational constraints between task  Platform inserts at vehicle interfaces providing flexibility for future vehicle changes 8
  • New Operability EffortsConstellation Space Transportation Planning Office  Agency establishes CSTPO:  Production, Operations, and Sustaining counterpart to the Constellation Program’s DDT&E role.  Cx Associate Program Manager for Operations and Sustaining Constellation Program Constellation Space Transportation Program LEO Lunar Mars 9
  • New Operability EffortsConstellation Space Transportation Planning Office  CSTP Organization  Establishing interfaces between CxP and CSTP (ESMD and SOMD)  Interfacing with CxP boards and panels  Embedding into design centers’ processes  Evaluating cost drivers during the next two PPBE cycles  Evaluate mechanisms for funding operability opportunities  CSTP Technical Authority Support  Engineering  Co-located 24 Flight Program System Engineers (FPSE) w/ designers  Evaluating operability opportunities during design (PDR-CDR)  Safety & Mission Assurance  Defining flight hardware safety organization structure and interfaces with JSC and MSFC S&MA 10
  • SummaryConstellation Space Transportation Planning Office  Define Operability for Constellation phase D & E  Address operability of production, ground operations, flight operations, management systems and lessons for the next Architecture Cycle (Lunar) To have successful, safe, and cost effective mission execution; “Performance” must be balanced with “Operability” in the System Engineering Design Process Performance + Operability = Mission Success Producibility Op Reliability erab Maintainability ilit y Interoperability Sustainability Optimization 11
  • Constellation Space Transportation Planning OfficeConstellation Space Transportation Planning Office  NASA has established CSTP in late 2008 to be the Operations and Sustaining counterpart to the Constellation DDT&E Program  CSTP is embedded into the CxP processes to prepare the Constellation Ares I/ Orion block I for the Operations and Sustaining phase of the life cycle.  Includes Production, Ground Processing, Flight Ops and Recovery  Charter:  Lay the groundwork for the Constellation Space Transportation Program  Work within the agency governance structure  Establish in program/project activities and processes the  Engineering Technical Authority  Safety Technical Authority  Health and Medical Technical Authority  Work with the Cx program and projects to establish collaborative relationships  Work closely with the Mission Operations Directorate at JSC  Flight rule development, planning, ascent, on orbit, and reentry/landing support  Constellation Space Transportation Program  Charter:  Manage the production, sustaining engineering, launch preparations, on-orbit and recovery of the Ares I/Orion vehicle configuration that will transport crew safely to/from the ISS