Huebner
- 1. National Aeronautics and Space Administration Ares Design Influence from Ares I-X Flight Data (as of 12/4/2009) Lawrence D. Huebner Vehicle Integration Office Ares Projects Office Project Management Challenge 2010 Galveston, TX February 9-10, 2010 www.nasa.gov Special Thanks to James S. Richards Used with Permission
- 2. Background and Purpose ♦Performing the Ares I-X flight test early in the Constellation Program manifest allows flight test data to be used by the Ares Projects Office to partially validate and perhaps modify the tools and models being used to design and develop Ares I. ♦This briefing will provide a summary of the plans for Ares I-X flight evaluation and specific examples of how the Ares I-X flight test data will be used for addressing validation of tools, models, and processes. National Aeronautics and Space Administration 2
- 3. Ares I-X Ascent Flight Scenario National Aeronautics and Space Administration 3
- 4. Ares I-X Flight Test Objectives Primary Objectives Secondary Objectives 1. Demonstrate control of a vehicle 1. Quantify the effectiveness of the First dynamically similar to the Ares I/Orion Stage separation motors vehicle using Ares I relevant flight control algorithms 2. Characterize induced environments and loads on the FTV during ascent 2. Perform an in-flight separation/staging flight phases event between an Ares I-similar First Stage and a representative Upper 3. Demonstrate a procedure to determine Stage the vehicle’s pre-launch geodetic orientation vector for initialization of 3. Demonstrate assembly and recovery of the flight control system a new Ares I-like First Stage element at KSC 4. Deleted 4. Demonstrate First Stage separation 5. Characterize induced loads on the LV sequencing, and quantify First Stage on the launch pad (under review) atmospheric entry dynamics, and parachute performance 6. Assess potential Ares I access locations in the VAB and on the Pad 5. Characterize magnitude of integrated vehicle roll torque throughout First 7. Assess First Stage electrical umbilical Stage flight performance National Aeronautics and Space Administration 4
- 5. Ares I-X Instrumentation Summary Development Flight Instrumentation (DFI) Instrumentation that provides engineering data requested by Ares I/Ares I-X discipline leads and elements to enable model verification and detailed information about flight vehicle performance and environments. Thermal GN&C/Trajectory Description CM/LAS USS IS FS Totals CM/LAS USS IS FS Totals Calorimeter 8 12 15 62 97 Air Data Vanes 2 2 Radiometer 6 6 5 Hole Probe (10 channels) 10 10 Gas Temperature Probe 1 12 13 Total Air Temperature Probe 2 2 Static Pressure 4 11 8 39 62 SIGI INU 20 20 Differential Pressure 9 9 BDM Case Strain 8 8 Temperature 21 1 77 99 BTM Case Strain 4 4 Thermal Totals 33 25 23 205 286 GN&C/Trajectory Totals 14 0 0 32 46 Structures Aerosciences Description CM/LAS USS IS FS Totals Description CM/LAS USS IS FS Totals Internal Microphones 1 1 2 4 Unsteady Pressure (HF) 17 8 1 11 37 Accelerometer (LF) 15 16 11 42 Unsteady Pressure (HF) 9 11 2 22 Accelerometer (HF) 5 3 8 Unsteady Pressure (LF) 66 65 16 92 239 Biaxial Accelerometer (LF) 24 24 Aero Totals 92 84 19 103 298 Triaxial Accelerometer (LF) 12 12 Triaxial Accelerometer (HF) 3 6 9 On-Board Video Strain Gauges 8 8 Description CM/LAS USS IS FS Totals Biaxial Strain Gauge 24 24 Video Camera 1 4 5 Triaxial Strain Gauge 12 36 6 54 Video Totals 0 1 0 4 5 Operational Pressure Transducer 2 2 House Keeping Structures Totals 21 43 47 76 187 Description CM/LAS USS IS FS Totals Pyro Shock Lockheeed Accelerometer (HF) 6 7 13 Description CM/LAS USS IS FS Totals Master DAU Status 26 13 39 Forward Skirt Sep. Pyro Shock 2 2 Remote DAU Status 12 18 30 Shock Totals 0 0 0 2 2 House Keeping Totals 0 44 0 38 82 DFI Totals 160 197 89 460 906 Notes: LF=Low Frequency, HF=High Frequency, INU=Inertial Navigation Unit Operational Flight Instrumentation (OFI) Instrumentation required to verify the launch readiness and performance of the avionic systems and flight control system for the successful operation of the flight vehicle. 608 parameters (FTINU, discrete, analog measurements) National Aeronautics and Space Administration 5
- 6. Ares I-X External DFI Sensor Layout National Aeronautics and Space Administration 6
- 7. Ares I-X Post-Flight Integrated Plans Mission Management Office Ares I-X Flight Test Ares Projects Office Planning: AI1-SYS-DAP Data Planning: CxP 72312 Flight Evaluation Post-Flight Data • Ares I Use of Ares I-X Data Analysis Results Affecting to Influence the Design: • Mission Success Flight Evaluation Model & Process Partial Validation • System Performance 30-60-90 Day Supporting Products • Updated Ares I Models and Reports for Flight Evaluation Processes • Integrated Flight Evaluation Report National Aeronautics and Space Administration 7
- 8. Ares I-X Post-Flight Data Analysis Baseline Schedule National Aeronautics and Space Administration 8
- 9. Ares I-X Supporting Product Coordination Mission Management Office Ares I-X Flight Test Ares Projects Office Planning: AI1-SYS-DAP Data Planning: CxP 72312 Post-Flight Data Flight Evaluation Analysis Results Affecting • Ares I Use of Ares I-X Data to Influence the Design: Flight Evaluation • Mission Success Model & Process Partial Validation • System Performance 30-60-90 Day Supporting Products • Updated Ares I Models and Processes Reports for Flight Evaluation • Integrated Flight Evaluation Report ♦ Plan: Formal product delivery agreement between MMO and APO in place prior to flight. ♦ Approach • Requests from Ares I to Ares I-X for Supporting Products will be formally documented using the Constellation Analysis Integration Tool (CAIT) Task Description Sheets (TDSs) • Requests coordinated and negotiated with the product supplier prior to submission for formal approval • Formal agreements documented by Ares I (JP10) and Ares I-X (SE&I) signoff of TDSs ♦ TDS Status: All 22 have been approved ♦ Ares I-X Supporting Products delivery dates in baseline Flight Evaluation Plan (CxP 72312) are currently TBR • CR CLV-FITO-0058 in-work to resolve CXP 72312 TBRs. National Aeronautics and Space Administration 9
- 10. Task Description Sheet Summary C ou n t N u m b er T itle Sta tu s 1 C LV-07-1017 Ares I-X Post-fl igh t Best Estim ated T rajectApp roved (BET ) 2 C LV-07-1018 First Stag e P erfo rm ance Prod ucts App roved 3 C LV-07-1021 As-Built H ard w a re D escriptio n App roved 4 C LV-07-1022 As-Built In stru m en ta ti on D e scrip ti on App roved 5 C LV-07-1023 M aster Eve nts List App roved 6 C LV-07-1024 R oC S P erform ance App roved 7 C LV-07-1025 R econ stru cte d M ass Prop erties App roved 8 C LV-07-1028 G roun d In fo rm ation to Su pp ort Acou stic a nApp roved O ver Pressure Task 9 C LV-07-1030 M ID D S & Atm o sp he ric D a ta App roved 10 C LV-07-1031 R econ stru cte d Ae rody nam ics App roved 11 C LV-07-1034 Veh icle P ositi on fro m Integ ration o f On-Bo App roved Acce leration M e asurem e nts 12 C LV-07-1035 Th rust O sci llation T ransfer Fu nction App roved 13 C LV-07-1038 N ASTR AN Structural M od els App roved 14 C LV-07-1040 Vibro acoustic a nd Shock D e si gn an d Test D ata App roved 15 C LV-07-1042 G roun d and C ast G lan ce Im ag ery at App roved Sep aration 16 C LV-07-1043 M od el & Sp eci fication D ata fo r App roved Instrum e ntation 17 C LV-07-1044 R oll D i stu rban ce T orqu e Assessm ent and App roved R oll ing M om en t M o del 18 C LV-07-1049 Ares I-X Pho to grap hic Ob se rvation s from FApp roved Stage Ign ition to Tow e r C lea r 19 C LV-07-1052 Up per Sta ge Sim ula to r Statistical E ne rgy App roved Ana lysis (SEA) Fin al P refl igh t M od els 20 C LV-07-1054 FIR ST ST AG E PR E -LAUN C H D AT A TO SUP P App roved FLIG H T EVALUAT ION 21 C LV-07-1056 First Stag e Vib roacou stics a nd Sho ck Po st App roved Flig ht An alysis R esults 22 C LV-07-1058 Ph otog raph s of Install ed H ig h Frequ en cy App roved Pre ssure T ransd ucers 10/22/09 National Aeronautics and Space Administration 10 10
- 11. Ares I-X Post-Flight Integrated Plans Mission Management Office Ares I-X Flight Test Ares Projects Office Planning: AI1-SYS-DAP Data Planning: CxP 72312 Flight Evaluation Post-Flight Data • Ares I Use of Ares I-X Data Analysis Results Affecting to Influence the Design: • Mission Success Flight Evaluation Model & Process Partial Validation • System Performance 30-60-90 Day Supporting Products • Updated Ares I Models and Reports for Flight Evaluation Processes • Integrated Flight Evaluation Report National Aeronautics and Space Administration 11
- 12. Ares Projects Office Flight Data Utilization Plans ♦ Anticipated activities utilizing Ares I-X flight data • Model validation by technical disciplines – Utilize flight data for model validation. – Update models based on validation effort (if necessary). – Exercise updated models in Ares I vehicle analyses as influenced by Ares I-X flight data. • This will NOT be completed for all disciplines by IVBR and will impact Element CDRs. • Elements use available Ares I updated analyses to support their CDRs. • Ares VI integrates element CDR results and performs integrated analyses for Ares I CDR. National Aeronautics and Space Administration 12
- 13. Flight Evaluation Plan ♦ CxP 72312, “Flight Evaluation Plan for Ares I Use of Ares I-X Flight Data” defines: • Engineering flight evaluation tasks to be executed to support design tool validation – Primarily organized around technical discipline lines – Task owners responsible for definition and execution • Task Title • Task Identification Number • Task Owner • Task Content • Task Product • Schedule for Task Product • Supporting Products Required for Task • Flight Measurements Required for Task • Plans for management of flight evaluation efforts • Documentation of results from tasks ♦ Baseline CxP 72312 Released May 19, 2009 ♦ CR is in-work to revise CxP 72312 • Eliminate TBDs and TBRs • Updates reflecting “new” MSFC org. structure • Awaiting completion of agreements on open TDSs National Aeronautics and Space Administration 13
- 14. Ares I-X Flight Evaluation Task List (from CxP 72312, Flight Evaluation Plan for Ares I Use of Ares I-X Flight Data) Task # Task Title Task ID 1 High-Altitude Deceleration (HAD) Model Validation FSS001 2 First Stage Thermal Model Validation for Ascent and Re-Entry Heating FSS002 3 Validation of First Stage Aft Skirt Vibration Environments Models FSS003 4 Application of Ares I-X Thrust Oscillation Forcing Function to Ares I FSS004 5 Evaluation of Motor Age on the Ares I-X First Stage Performance FSS005 6 Validation of Thrust Oscillation Modeling FSS006 7 Updated Ares I Rollout Loads Using Ares I-X Derived Base Acceleration IVSL001 8 Updated Ares I Ground Wind Loads Using Ares I-X Ground Measurement System (GMS) Data IVSL002 9 Updated Ares I Liftoff Loads Using Ares I-X Flight Data IVSL003 10 Perform Loads Reconstruction for Ares I-X IVSL004 11 Updated Ares I Separation Loads Using Ares I-X Flight Data IVSL005 12 Validation of Vibroacoustic Prediction Methodology and Empirical Scaling Techniques SLD001 13 Validation of Separation Pyroshock Attenuation Models SHOCK001 14 Aerodynamic Database Generation Process Validation AD001 15 Aeroelastic Fluctuating Pressure Model Validation AD002 16 Validation of Ascent Aerodynamic Heating Code for Protuberances AT001 17 Validation of First Stage Reentry Aerodynamic Heating Code AT002 18 SRM Plume Radiation Code Validation AT003 19 Validation of Semi-Empirical and Computational Fluid Dynamics (CFD)-Based Solutions for First Stage Plume Convection AT004 20 Validation of CFD Code for First Stage Plume Induced Flow Separation AT005 21 Validation of CFD Code for Small Motor/Engine Plume Impingement AT006 22 Validation of FS RSRM Shutdown Spike Curve Fit Built into Current Models AT007 23 Validation of Ares I Liftoff Acoustic Environments AA001 24 Validation of Ares I Ascent Acoustic Environments AA002 25 Validation of Ares I Venting Analysis Tools VENT001 26 Gyrocompass Alignment for Launch GNC001 27 Validation of Flight Control System Design Tools GNC003 28 Validation of Trajectory Reconstruction Capability TR-PER001 29 Validation of Best Estimate Trajectory (BET) Generation Capability TR-PER002 30 Validation of SRB Performance Knock-Down TR-PER003 31 Validation of First Stage/Upper Stage Separation Dynamics Modeling TR-PER004 32 Validation of Vehicle Drift Modeling TR-PER005 33 Evaluation of Abort Triggers Using Ares I-X Flight Data TR-PER006 National Aeronautics and Space Administration 14
- 15. Typical Flight Evaluation Task Schedule Time Description L - 2 weeks Analytical Predictions for Comparison Completed and Documented L + 4 days Preliminary Flight Data Available for Comparison L + 35 days Best Source Flight Data Available for Comparison L + 36 days Flight Evaluation Kickoff Meeting L + 8 weeks Initial Comparisons of Predicted and Actual Data Presented to Appropriate Panel/Team L + 12 weeks Final Comparisons of Predicted and Actual Data Presented to Panel/Team - Data Comparisons - Model and Process Updates Assessment L + 20 weeks Panel/Team Review of Final Task Product Completed L + 22 weeks Technical Management Team Vetting of Final Task Product Completed L + 24 weeks Updates to Model and/or Process Implemented for use in Ares I Critical Design Review Analyses L + 26 weeks Task Product Transmitted to Flight Evaluation for Integration into the Final Flight Report L + 28 weeks Final Flight Evaluation Review Presentation L + 30 weeks Integrated Flight Evaluation Report Delivered Notes: Bold Font = Flight Evaluation Milestone L = Launch National Aeronautics and Space Administration 15
- 16. Flight Evaluation Schedule ♦ Ares I-X Flight Evaluation Kickoff Meeting: December 16, 2009 ♦ Task Products transferred to FEWG: May 19, 2010 ♦ Final FEWG Presentation/Review: June 2, 2010 ♦ Final Flight Evaluation Report delivered: June 16, 2010 National Aeronautics and Space Administration 16
- 17. Flight Evaluation Schedule Based on 10/28/2009 Launch Submit Report Input Final FE Report Delivered Note: Two weeks added to evaluation time for holidays. Flight Evaluation Start Results Vetted by 11/27/09 National Aeronautics and Space Administration (Best Source Data) AFSIG/FS CE 17
- 18. Ares I-X Flight Evaluation Task Example 1 ♦ AD001: Aerodynamic Database Generation Process Validation ♦ Task Owner: Robert Hall ♦ Task Content • Comparison of Ares I-X flight data with preflight database to validate aerodynamic database generation process (wind tunnel test data and CFD analyses to flight configuration and conditions) • Based on a comparison between prediction results and flight data, the process will be updated as required ♦ Task Product • Technical report with comparisons between preflight predicted data Ares I-X measured flight data • Report will document process adjustments resulting from evaluation of Ares I-X data and provide rationale for process adjustments ♦ Measurement Summary • 59 High-frequency pressure measurements • 239 Low-frequency pressure measurements National Aeronautics and Space Administration 18
- 19. Ares I-X Flight Evaluation Task Example 2 ♦ AT001: Validation of Ascent Aerodynamic Heating Code CLVMIN for Protuberances ♦ Task Owner: Mark D’Agostino ♦ Task Content • Historical test data from wind tunnel tests has been used to derive existing amplification factors in the CLVMIN code for protuberances • Ares I-X flight data will be used to validate CLVMIN math models by comparing preflight prediction data with measured flight data • Based on comparisons, the model and/or amplification factors will be updated as required ♦ Task Product • Technical report with comparisons between preflight Ares I-X prediction levels and measured flight data for aerodynamic heating for protuberances • Report will document model and amplification factor adjustments resulting from evaluation of Ares I-X data and provide rationale for model/CLVMIN amplification factor adjustments ♦ Measurement Summary • 36 Calorimeters • 36 Temperatures • 31 Static Pressures National Aeronautics and Space Administration 19
- 20. Ares I-X Flight Evaluation Task Example 3 ♦ AA002: Validation of Ares I Ascent Acoustic Environments ♦ Task Owner: Darren Reed ♦ Task Content • Ares I-X flight data will provide a significant resource for Ares I acoustic model and process validation • Acceptable geometry, correct Strouhal number, realistic Reynolds number, correct boundary layer conditions, and a correct relationship between the size of the pressure transducer and the vehicle • Preflight predictions of the Ares I-X ascent acoustic environment will be made using the Ares I design tools for comparison with the Ares I-X flight data • Updates to Ares I prediction models and processes will be implemented for development of the Ares I CDR liftoff acoustics environment development ♦ Task Product • Technical report showing the ascent acoustic environment comparisons between preflight predicted data and Ares I-X measured flight data • Report will document model and process adjustments resulting from evaluation of the flight data and provide rationale for the adjustments ♦ Measurement Summary • 60 High-frequency unsteady pressure measurements National Aeronautics and Space Administration 20
- 21. Ares I-X Flight Evaluation Task Example 4 ♦ GNC003: Validation of Flight Control System Design Tools ♦ Task Owner: Mike Hannan ♦ Task Content • Validation of Ares I control system design and analysis tools (MAVERIC and SAVANT) • Comparing measured vehicle response to pre-programmed test inputs to what the tools predict will contribute to validation of the tools and math models • Thrust Vector Control (TVC) performance will be evaluated by comparing the actual TVC response to commands with predictions of TVC dynamic model (integral to control system design/performance) ♦ Task Product • Technical report showing the comparisons between preflight predicted data and Ares I-X measured flight data • Report will document Flight Control System design tool adjustments resulting from evaluation of the flight data and provide the rationale for the adjustments ♦ Measurement Summary • 190 OFI measurements National Aeronautics and Space Administration 21
- 22. Ares I-X HOSC Responsibilities ♦ Goal of Huntsville Operations Support Center (HOSC) is to provide a single repository for Ares I-X post-flight data ♦ Data includes: • OFI and DFI • Video (ground-based, on-board, and airborne) • Voice • KSC Ground Control System and Rollout Data • KSC Test Data • Ares I-X Critical Math Models • Close Out Imagery • Post-Flight Data Analysis products (BET, Recon Mass properties, SRB/BTM/BDM performance, RoCS performance, etc.) • Post-Flight Data Analysis reports (30, 60 & 90 day) • Meteorological • Range • NASA Debris Radar ♦ Data not physically stored in HOSC will be available via HOSC portals National Aeronautics and Space Administration 22
- 23. Ares I-X Post-Flight Key Data Availability Status (as of 12/4/2009) ♦ Ground data (rollout, pre-launch vehicle health and status) available 48 hours after receipt in the KSC Wave Analysis Lab • Status: Data is now available ♦ OFI, DFI and Video delivered to HOSC at L+3 days from the TEL-4 and JDMTA ground sites • Status: Data available to users at HOSC • Assumes no telemetry processing issues ♦ Final meteorological data available at L+3 days • Status: Data has been delivered to LaRC SE&I GN&C for their use • Official delivery to HOSC for long term storage should occur this week ♦ Range radar data to be delivered to HOSC at L+7 days • Status: Data actually delivered to the HOSC L+3 weeks ♦ Ground based imagery (video, & film) will be available to users at L+14 Days • Status: Data is now available • Access via MSFC Photographic Engineering Analysis Lab web site ♦ NASA debris radar data will be delivered to MSFC from JSC at L+30 days • Status: Data delivered to LaRC SE&I GN&C for their use • HOSC will make this data available to users at L+31 days ♦ Best Source flight data available at L+35 days • Status: Data to be delivered to HOSC on 12/7/2009 National Aeronautics and Space Administration 23
- 24. Ares Flight Evaluation Working Group (FEWG) Ares I-X FEWG Chairman David Waits Ares I-X FEWG Staff Ares I Vehicle Ares I First Stage Engineering Support Integration Chief Engineer Function Manager Chief Engineer Wendy Cruit Van Woodruff R.H. Coates Ares I Project Ares I-X Ares I Safety & Mission Representative Chief Engineer Assurance Representative Larry Huebner Joe Brunty Chris Cianciola FEWG will coordinate, monitor, integrate, and direct evaluation activities and approve evaluation final results National Aeronautics and Space Administration 24
- 25. Final Flight Evaluation Report Outline ♦ 1.0 EXECUTIVE SUMMARY • Summary of the Ares I Flight Evaluation results • Responsible: FEWG Chairman ♦ 2.0 INTRODUCTION • Provides a discussion of purpose and scope of the report • Responsible: FEWG Chairman ♦ 3.0 ARES I-X FINAL MISSION ASSESSMENT RESULTS SUMMARY • Extracted/Summarized from the Ares I-X Mission Management Office (MMO) 90-Day Report (Final Report) • Mission Overview as Executed • Mission Anomalies • Implications/Limitations for Planned Ares I Use of the Ares I-X Flight Results • Responsible: Ares I-X Chief Engineer National Aeronautics and Space Administration 25
- 26. Final Flight Evaluation Report Outline ♦ 4.0 ARES I-X DATA QUALITY REPORT • Describes Overall Quality of the Measured Flight Data • Defines Known Problems in the Measured Flight Data (gaps, noise, etc.) • Responsible: Engineering Support Function Manager ♦ 5.0 INTEGRATED VEHICLE EVALUATION TASK RESULTS • Products of Integrated Design and Analysis Tasks • Products of Other Integrated Vehicle Tasks • Responsible: Ares I Vehicle Integration Chief Engineer ♦ 6.0 FIRST STAGE EVALUATION TASK RESULTS • Products of First Stage Systems Tasks • Responsible: Ares I First Stage Chief Engineer National Aeronautics and Space Administration 26
- 27. Summary ♦ Flight evaluation plans for Ares I use of Ares I-X flight data have been established and are being executed. ♦ Presentation provided information on: • Ares I-X flight test objectives and measurement summary • Ares I-X data analysis plan overview • Ares I flight evaluation plan details • Flight evaluation schedule • Task list • Task schedule • Task examples • Creation of Ares Flight Evaluation Working Group • Flight evaluation report schedule and outline ♦ Intent of flight evaluation task execution is to influence the design of Ares I prior to their Critical Design Review by partial validation of the tools, models, and processes being used by technical disciplines and elements. National Aeronautics and Space Administration 27
- 28. BACKUP National Aeronautics and Space Administration 28
- 29. Ares I-X Primary Objectives Assessment to Support Ares I Objective Description Status Approach/Ares I Application P-1 Demonstrate control of a vehicle ♦Ares I-X uses the same overall architecture and augmentation dynamically similar to the Ares I / approaches as Ares I. Orion vehicle using Ares I G ♦Differences in filtering, anti-drift augmentation. GN&C parameters are dictated by differences in structural dynamics relevant flight control algorithms. and sensor locations. P-2 Perform an in-flight separation/ ♦Considering the differences with Ares I separation, Ares I-X staging event between an Ares I- provides flight data to evaluate or characterize: similar First Stage and a • First Stage thrust side load at separation. representative Upper Stage. YG • Effectiveness of BDMs. • Timing of events. • Shock attenuation via pyro shock sensors. • Basic kinematics of separation. P-3 Demonstrate assembly and ♦Ares I-X is a pathfinder vehicle for stacking, assembly, and recovery of a new Ares I-like First Stage element at KSC. G recovery operations at KSC. P-4 Demonstrate First Stage ♦Ares I-X demonstrates first stage tumble, re-entry, deceleration separation sequencing, and using prototype parachutes, as well as tow-back and lift of first quantify First Stage atmospheric YG stage, but not secondary separation of interstage. ♦Flight data will be used to assess first-stage atmospheric entry entry dynamics, and parachute performance. dynamics models. P-5 Characterize magnitude of ♦Agreement on requirement to perform PTI maneuvers to obtain integrated vehicle roll torque throughout First Stage flight. G total (aerodynamic and RSRM-induced) roll data via RoCS “blackout” intervals. National Aeronautics and Space Administration 29
- 30. Ares I-X Secondary Objectives Assessment to Support Ares I Objective Description Status Approach/Ares I Application S-1 Quantify the effectiveness of the ♦Booster Deceleration Motors incorporate case strain First Stage separation motors. G measurements to know the motor fired and infer performance. S-2 Characterize induced ♦A significant percentage of the Development Flight environments and loads on the Instrumentation sensors will be used to satisfy this FTV during ascent flight phases. G objective. ♦Roughly one-third of the sensors are of particular interest to Ares. S-3 Demonstrate a procedure to ♦Ares I-X employs a FTINU. Ares I will employ a FTINU derived determine the vehicle’s pre- system and estimate the initial attitude in a like manner. launch geodetic orientation vector for initialization of the flight G ♦Gyrocompass alignment (GCA) tests have been conducted in the VAB and validated with optical measurements. control system. ♦Objective will be satisfied upon acceptance of GCA data. S-5 Characterize induced loads on the ♦Ground Measurement List with 79 sensors coordinated by LV on the launch pad. G GS, GO, Ares Projects Office, and Ares I-X to satisfy this objective. S-6 Assess potential Ares I access ♦Ares I personnel witnessed stacking operations and modal locations in the VAB and on the Pad. G surveys in VAB HB3. S-7 Assess First Stage electrical ♦Ares I-X will provide initial understanding and assessment umbilical performance. G of the electrical umbilical location and performance for incorporation into the Ares I configuration. National Aeronautics and Space Administration 30
- 31. Silver Bullet Sensor Summary ♦ In January 2009, NESC Technical Fellow for Aerosciences, engaged the Cx and engineering community to identify a subset of current non-mandatory DFI for potential reclassification • Those sensors that we (the customers) would expend “silver bullets” to keep on Ares I-X ♦ Technical prioritization by region (total of 276 measurements): 1. RoCS • Sensors: Unsteady pressure (buffet and aeroacoustic) and thermal instruments • Rationale: Addresses aeroacoustic environment estimation and RoCS plume thermal environments 2. Frustum/Forward Skirt • Sensors: Unsteady pressures • Rationale: Addresses buffet and aeroacoustic pressure environments and static pressure prediction, liftoff acoustics, and RoCS plume impingement. Wind-tunnel results are significantly different from predictions 3. Aft Skirt • Sensors: Thermal sensors and unsteady pressures • Rationale: Addresses prediction of thermal environments, static pressures, and liftoff acoustics 4. Instrument Unit • Sensors: Unsteady pressures • Rationale: Liftoff and ascent acoustics at a known critical location for Ares I 5. CM/SM Interface • Sensors: Unsteady pressures • Rationale: Addresses fluctuating pressure environments with greatest prediction uncertainty (shock/separation alternating flow - art vs. science), liftoff acoustics. Wind-tunnel results are significantly different from predictions National Aeronautics and Space Administration 31
- 32. Ares I-X Flight Evaluation Task Example 5 ♦ FSS006: Validation of Thrust Oscillation Modeling ♦ Task Owner: Tom Nesman ♦ Task Content • Reconstructed Solid Rocket Motor performance data coupled with measured forward end pressure for oscillation amplitude and frequency content • Analysis results compared with historical data from ground tests and Shuttle flights to validate applicability of the modeling used in Ares I design ♦ Task Product • Technical report with comparisons between preflight Ares I-X prediction levels and Ares I-X reconstructed and measured flight data • Report will document model adjustments resulting from evaluation of Ares I-X data and provide rationale for model adjustments ♦ Measurement Summary • 2 Motor dome pressures from Operational Flight Instrumentation (OFI) • 2 Motor dome pressures from Development Flight Instrumentation (DFI) National Aeronautics and Space Administration 32
- 33. Ares I-X Flight Evaluation Task Example 6 ♦ IVSL004: Perform Loads Reconstruction for Ares I-X ♦ Task Owners: Tom Howsman/Dave McGhee ♦ Task Content • Load reconstruction analysis using Ares I-X Best Estimated Trajectory, Day of Launch wind measurements, and DFI accelerations • Analysis includes quasi-static aerodynamic, gust, maneuvering, and buffet loads • Loads from analysis will be compared with Ares I-X flight test data. • Comparison results used to update models and processes in Ares I loads design analyses ♦ Task Product • Technical report with Ares I-X loads analysis results, loads from Ares I-X flight, and a comparison of the two sets of results • Report will document any changes made to loads models and processes used in Ares I design analyses and rationale for those changes ♦ Sensor Summary • 54 acceleration measurements • 2 total air temperature measurements • 86 strain gauge measurements • 2 operational pressure transducers • 10 measurements from 5-hole probe • 10 channels from Space-Integrated • 2 air data vane measurements GPS/INS Inertial Navigation Unit National Aeronautics and Space Administration 33
- 34. Ares I-X Flight Evaluation Task Example 7 ♦ TR-PER004: Validation of First Stage/Upper Stage Separation Dynamics Modeling ♦ Task Owner: Charles Adams ♦ Task Content • Ares I-X flight data will be used to partially validate the MAVERIC FS/US separation dynamics modeling process • Individual stage dynamics (FS and US) derived from measured FS rates, ground-based and airborne imagery, and range radar data will be compared with MAVERIC model results • Adjustments to MAVERIC and/or the process by which the separation dynamics are analyzed will be made and documented prior to generation of the Ares I CDR stage separation analyses ♦ Task Product • Technical report showing comparisons between post-flight model results and Ares I-X measured flight data • Report will document MAVERIC tool adjustments and the separation analysis process adjustments resulting from evaluation of the flight data and provide the rationale for the adjustments ♦ Measurement Summary • 190 OFI measurements National Aeronautics and Space Administration 34