Design, Analyses, and ,. Simulation Results
NASA Technical Paper 3446 _:i,2 _ .,/, ! High-Alpha Research Vehicle (HARV) Longitudinal Controller: Design, Analyses, and ,. Simulation Results Aaron J. Ostroff Langley Research Center • Hampton, Virginia Keith D. Hoffler ViGYAN, Inc. • Hampton, Virginia Melissa S. Proffitt Lockheed Engineering & Sciences Company • Hampton, Virginia :' National Aeronautics and Space Administration Langley Research Center • Hampton, Virginia 23681-0001 • : J July 1994 /: The use of trademarks or names of manufacturers in this i! 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. Acknowledgment The authors wish to acknowledge the following individuals who made important contributions to the research described in this paper: Philip W. Brown, Michael R. Phillips, and Robert A. Rivers, all from NASA Langley Research Center, who served as test pilots and provided ratings and insightful comments for the piloted simulation tasks. Michael D. Messina, Lockheed Engineering & Sciences Company, Hampton, VA, who maintained the nonlinear batch simulation and organized test cases for transportingreal-time code. Susan W. Carzoo, Unisys Corporation, who maintained the real- time software for the piloted simulation. Dr. Barton J. Bacon, NASA Langley Research Center, who constructed and tested the real-lt algorithms used for robustness analysis. John V. Foster, NASA Langley Research Center, who performed some engineering-test
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