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Calspan Status Update. AG&C Committee, March 1-3, 2006 Lake Tahoe, NV E. Ohmit. Calspan Status Update. Lear AAR Tanker testing in Buffalo & TTNT Flight testing Learjet AFTPS Project (with servo-throttle) Learjet Sense & Avoid Project TIFS Boeing Project TWT – Free to Roll Rig. - PowerPoint PPT Presentation
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Calspan Status Update
AG&C Committee, March 1-3, 2006
Lake Tahoe, NV
E. Ohmit
Calspan Status Update
• Lear AAR Tanker testing in Buffalo & TTNT Flight testing
• Learjet AFTPS Project (with servo-throttle)• Learjet Sense & Avoid Project• TIFS Boeing Project• TWT – Free to Roll Rig
Learjet Automated Aerial Refuleing (AAR)
• AAR Sponsored by AFRL
• Other Major Participating Organizations:
– DARPA, NAVAIR, Boeing, Northrop Grumman, Rockwell Collins, Titan
• Utilizing Learjet as “surrogate” UAV
• Objectives:
Clear Learjet to operate up to and including Contact position with KC-135
• No actual hook-up
Evaluate acceptability of sensors
• PGPS & Optical, Datalink (TTNT)
– Evaluate control laws for automated refueling
Complete
Complete
Learjet AAR
• Initial Test Flights (complete)– Sep 2004– With Niagara Falls ANG KC-135– Cleared LJ to operate with KC-135– Gathered data for PGPS & EO
sensors– 8 flights, 12.2 Flt-Hrs
Learjet AAR
• Second Flight Test (complete):
– Datalink tests – Sep 2005
– Tactical Targeting Network Technology (TTNT)
– DARPA funded – Rockwell Collins developed
– At NAWCWD China Lake, CA
– Gathered Datalink (TTNT) data
• Simulated Aerial Refueling
• Simulated Carrier Approach
– Flew with NAVAIR E-2C (Surrogate Tanker)
– 5 other aircraft took part:
• F-15, F-18, B-707(Paul Revere), T-39, R-C Sabreliner
– 3 ground stations
– 7 Flights, 9.7 Flt-Hrs, Plus many days of integration and ground tests
Learjet AAR
• Third Flight Test:
– Autonomous Station-Keeping – Aug 2006.
– Re-install PGPS/INS/TTNT.
– AAR control Laws in Boeing-supplied Flight Control Computer (FCC).
– FCC interfaces with Learjet VSS through sensors & commands to elevator, aileron, rudder, throttle.
– Safety Pilot will fly into various refueling positions then engage simulation; AAR Control Laws will Station-keep during typical Tanker maneuvering.
– Fly at Niagara Falls with 107th ANG KC-135
– ~20 Flights, 35 Flt-Hrs
• Fourth Flight Test:
– Trajectory Control – Aug 2007
– As above, but Autonomously move from:
• Observation Pre-Contact Contact Breakaway positions.
Learjet AAR - Related Efforts
• Servo-Throttle Capability in Learjet– Servo-Throttle installed to achieve 4th DOF.
– Electrical servos attached to throttle cables at fuel control lever in each engine.
– Installed & Checked out in September 2005.
– Utilized in AF Test Pilot School Project with AFIT AAR Control Laws.
• Oct 2005, 7 Flights
• Installed simple Datalink & GPS
• Verified Servo-throttle operations
• Autonomously controlled LJ behind a C-12 (King Air)
• Trajectory and station-keeping with refueling maneuvers
- Held position within 2 ft
Learjet – Future AFTPS Efforts
• Flight Controls Project– Performed during every class– Students design and fly simple FCS– Stabilizes an unstable configuration
• Test Management Projects being planned for 2007:– AAR-related EO System data gathering– Boundary/PIO evaluations
Learjet Sense & Avoid
• UAV Sense & Avoid in National Air Space.
• Autonomously Detect and Avoid intruder aircraft in terminal environment.
• Equivalent Level-of-Safety as piloted operations.
• Based on Global Hawk operations.
Cooperative• TCAS or Mode-C• Detectable• Coordinated
Collision Avoidance
Non-Cooperative• Detect with Cameras
Learjet Sense & Avoid
• AFRL-Sponsored
• Northrop Grumman (NGC) – prime contractor
• Defense Research Associate (DRA) - Camera system, detector, tracker
• Calspan – Installations and Flight Test in Learjet
– Simulate Global Hawk dynamics
• Cooperative Intruder Aircraft (TCAS-II or Mode-C Transponder)
• Non-Cooperative Aircraft (No transponders, Use Optical Cameras)
– DRA supplies 3-Camera system - Detects & Tracks Intruder
– NGC software determines trajectories and avoidance maneuvers
• Intrusion Scenarios:
– Head-on, overtaking, cross-track
• Intruder Aircraft:
– King Air & KC-135
• Fly 4th Quarter 2006 at Niagara Falls
TIFS Boeing
• Proprietary Advanced Control System Flight Tests– June - Dec 2005
• 11 Flights, 18 Hrs
– Future efforts planned in 2006
Learjet # 3 Development
• 3rd Generation Variable Stability Learjet– Model 25D designed primarily for Upset Recovery
Training (URT)• User-friendly Variable Stability System (VSS).
Free To Roll (FTR) Support System
• FTR Inaugurated Oct 2005
– Abrupt Wing Stall Studies
– Roll damping derivatives
•Multi-mode testing– Pitch sweeps– Yaw sweeps
•Quick to switch from FTR to S&C test mode