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NASA Dryden Update

NASA Dryden Update. Aerospace Control and Guidance Systems Committee Meeting #97 Lake Tahoe, NV March 1-3, 2006 Joe Pahle (661) 276-3185 Joe.pahle@nasa.gov. To Fly What Others Imagine …. Current Flight Programs with GNC involvement. UAVSAR.

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NASA Dryden Update

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  1. NASA Dryden Update Aerospace Control and Guidance Systems Committee Meeting #97 Lake Tahoe, NV March 1-3, 2006 Joe Pahle (661) 276-3185 Joe.pahle@nasa.gov

  2. To Fly What Others Imagine …

  3. Current Flight Programs with GNC involvement

  4. UAVSAR • The primary objective of the UAVSAR Project are to: • develop a miniaturized polarimetric L-band synthetic aperture radar (SAR) for use on an unmanned aerial vehicle (UAV) or minimally piloted vehicle • Roles & Responsibilities • JPL • Lead center that will design, fabricate, install and operate the radar instrument, develop processing algorithms and conduct data analysis • Dryden • Manage the development of pod design, fabrication and delivery to JPL • Deliver RPI interim platform and long term operational platform • NASA’s G-III selected as the interim platform • Lead the platform modification effort and head up flight operations of the platform • Develop Platform Precision Autopilot (PPA) capability • Total Aircraft Services, Inc. (TAS) • G-III modifications and pod fabrication • First Flight of SAR on G-III in November ‘06

  5. Platform Precision Autopilot Interface to G-III autopilot through Instrument Landing System (ILS)* IMPLEMENTATION GOALS JUSTIFICATION • Achieve required trajectory performance • Repeat Pass Flight within 10 m tube • Meet UAVSAR schedule requirements • Facilitate software development and • deployment • Minimize impact to G-III Flight • Management System (FMS) • Provide for safe and simple operation • Facilitate migration to UAV platform • Makes use of inherent accuracy in ILS • Simple modification to insert RF switches between ILS signals and PPA, isolating PPA from G-III FMS • PPA control is easily disabled by • disengaging autopilot • PPA control algorithms relatively simple *Approach used by Danish Center for Remote Sensing (DCRS) for a similar application

  6. Platform Precision Autopilot Hardware Interfaces • Autopilot Interface Computer (AIC) • Provide interfaces to external data sources • Host the control algorithm • Drive the ILS tester • Provide interface to operator station of G-III for waypoint upload, gain control, and data archive • ILS Interface System (IIS) • Modulate the ILS signal based on input from AIC • Provide the ILS glideslope (GS) and localizer (LOC) RF signals

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