NASA/TM(cid:16)2015-218675/Volume I NESC-RP-12-00770 Check-Cases for Verification of 6-Degree-of-Freedom Flight Vehicle Simulations Daniel G. Murri/NESC Langley Research Center, Hampton, Virginia E. Bruce Jackson Langley Research Center, Hampton, Virginia Robert O. Shelton Johnson Space Center, Houston, Texas January 2015 NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the (cid:120) CONFERENCE PUBLICATION. advancement of aeronautics and space science. The Collected papers from scientific and NASA scientific and technical information (STI) technical conferences, symposia, seminars, program plays a key part in helping NASA maintain or other meetings sponsored or this important role. co-sponsored by NASA. The NASA STI program operates under the (cid:120) SPECIAL PUBLICATION. 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Scientific (cid:120) Phone the NASA STI Information Desk at and technical findings that are preliminary or of 757-864-9658 specialized interest, e.g., quick release reports, working papers, and bibliographies that contain (cid:120) Write to: minimal annotation. Does not contain extensive NASA STI Information Desk analysis. Mail Stop 148 NASA Langley Research Center (cid:120) CONTRACTOR REPORT. Scientific and Hampton, VA 23681-2199 technical findings by NASA-sponsored contractors and grantees. NASA/TM(cid:16)2015-218675/Volume I NESC-RP-12-00770 Check-Cases for Verification of 6-Degree-of-Freedom Flight Vehicle Simulations Daniel G. Murri/NESC Langley Research Center, Hampton, Virginia E. Bruce Jackson Langley Research Center, Hampton, Virginia Robert O. Shelton Johnson Space Center, Houston, Texas National Aeronautics and Space Administration Langley Research Center Hampton, Virginia 23681-2199 January 2015 Acknowledgments The assessment team is grateful to Mr. Edwin Crues for providing permission to reuse this orbital scenario description and would like to express appreciation to Mrs. Pamela Sparks for keeping us organized. The use of trademarks or names of manufacturers in the report is for accurate reporting and does not constitute an official endorsement, either expressed or implied, of such products or manufacturers by the National Aeronautics and Space Administration. Available from: NASA STI Program / Mail Stop 148 NASA Langley Research Center Hampton, VA 23681-2199 Fax: 757-864-6500 Document #: Version: NASA Engineering and Safety Center NESC-RP- 1.0 Technical Assessment Report 12-00770 Title: Page #: Check-Cases for Verification of 6-DOF Flight Vehicle 1 of 26 Simulations Check-Cases for Verification of 6-Degree-of-Freedom Flight Vehicle Simulations October 30, 2014 NESC Document No.: NESC-RP-12-00770, Volume I Document #: Version: NASA Engineering and Safety Center NESC-RP- 1.0 Technical Assessment Report 12-00770 Title: Page #: Check-Cases for Verification of 6-DOF Flight Vehicle 2 of 26 Simulations Report Approval and Revision History NOTE: This document was approved at the October 30, 2014, NRB. This document was submitted to the NESC Director on December 15, 2014, for configuration control. Approved: Original Signature on File 12/15/14 NESC Director Date Office of Primary Version Description of Revision Effective Date Responsibility 1.0 Initial Release Daniel G. Murri, 10/30/14 NASA Technical Fellow for Flight Mechanics, LaRC NESC Document No.: NESC-RP-12-00770, Volume I Document #: Version: NASA Engineering and Safety Center NESC-RP- 1.0 Technical Assessment Report 12-00770 Title: Page #: Check-Cases for Verification of 6-DOF Flight Vehicle 3 of 26 Simulations Table of Contents Volume I: Technical Assessment Report 1.0 Notification and Authorization ..................................................................................................... 5 2.0 Signature Page ................................................................................................................................ 6 3.0 Team List ........................................................................................................................................ 7 3.1 Acknowledgements ............................................................................................................. 7 4.0 Executive Summary ....................................................................................................................... 8 5.0 Assessment Plan ........................................................................................................................... 10 6.0 Problem Description, Proposed Solutions, and Risk Assessment ............................................ 10 6.1 Problem Description ......................................................................................................... 10 6.2 Proposed Solution ............................................................................................................. 11 6.2.1 Check-Case Vehicle Models ............................................................................................. 11 6.2.2 Check-Case Geodesy Models ........................................................................................... 11 6.2.3 Check-Case Coordinate Systems ...................................................................................... 11 6.2.4 Check-Case Gravitation Models ..................................................................................... 12 6.2.5 Check-Case Atmosphere Models ..................................................................................... 12 6.2.6 Check-Case Data Formats ............................................................................................... 12 6.2.7 Participating Simulation Tools ....................................................................................... 13 6.2.8 Check-Case Scenarios ....................................................................................................... 13 6.3 Known Risks and Mitigations ........................................................................................... 14 7.0 Assessment Results....................................................................................................................... 18 7.1 Atmospheric check-case results ......................................................................................... 18 7.2 Orbital Check-Case Results .............................................................................................. 19 7.3 Comparison Difficulties .................................................................................................... 20 7.4 Summary of Comparisons ................................................................................................ 20 8.0 Findings, Observations, and NESC Recommendations............................................................ 21 8.1 Findings ............................................................................................................................ 21 8.2 Observations ..................................................................................................................... 22 8.3 NESC Recommendations ................................................................................................. 22 9.0 Alternate Viewpoint ..................................................................................................................... 23 10.0 Other Deliverables ....................................................................................................................... 23 11.0 Lessons Learned ........................................................................................................................... 23 12.0 Recommendations for NASA Standards and Specifications .................................................... 23 13.0 Definition of Terms ...................................................................................................................... 24 14.0 Acronyms List .............................................................................................................................. 24 15.0 References ..................................................................................................................................... 25 16.0 Appendices .................................................................................................................................... 26 NESC Document No.: NESC-RP-12-00770, Volume I Document #: Version: NASA Engineering and Safety Center NESC-RP- 1.0 Technical Assessment Report 12-00770 Title: Page #: Check-Cases for Verification of 6-DOF Flight Vehicle 4 of 26 Simulations List of Tables Table 6.3-1. Atmospheric Check-Case Scenarios .............................................................................. 15 Table 6.3-2. Exo-Atmospheric Check-Case Scenarios ....................................................................... 17 NESC Document No.: NESC-RP-12-00770, Volume I Document #: Version: NASA Engineering and Safety Center NESC-RP- 1.0 Technical Assessment Report 12-00770 Title: Page #: Check-Cases for Verification of 6-DOF Flight Vehicle 5 of 26 Simulations Volume I: Technical Assessment Report 1.0 Notification and Authorization This assessment was established to develop a set of time histories for the flight behavior of increasingly complex example aerospacecraft that could be used to partially validate various simulation frameworks. The assessment was conducted by representatives from several NASA Centers and an open-source simulation project. The primary stakeholders are users of flight simulation tools, including current and future NASA aeronautic and astronautic vehicle projects. Benefactors include NASA, the Department of Defense (DoD) , the aerospace industry, and academia. NESC Document No.: NESC-RP-12-00770, Volume I Document #: Version: NASA Engineering and Safety Center NESC-RP- 1.0 Technical Assessment Report 12-00770 Title: Page #: Check-Cases for Verification of 6-DOF Flight Vehicle 6of 26 Simulations 2.0 Signature Page Submitted by: (cid:53)(cid:70)(cid:66)(cid:78)(cid:1)(cid:52)(cid:74)(cid:72)(cid:79)(cid:66)(cid:85)(cid:86)(cid:83)(cid:70)(cid:1)(cid:49)(cid:66)(cid:72)(cid:70)(cid:1)(cid:80)(cid:79)(cid:1)(cid:39)(cid:74)(cid:77)(cid:70)(cid:1)(cid:14)(cid:1)(cid:18)(cid:19)(cid:16)(cid:18)(cid:25)(cid:16)(cid:18)(cid:21) Mr. Daniel G. Murri Date Significant Contributors: E. Bruce Jackson Date Dr. Robert Shelton Date Signatories declare the findings, observations, and NESC recommendations compiled in the report are factually based from data extracted from program/project documents, contractor reports, and open literature, and/or generated from independently conducted tests, analyses, and inspections. NESC Document No.: NESC-RP-12-00770, Volume I