Date: 2/22/12 Location: ACRC Aircraft: Thor Pilot: Arion Mangio Flights: 5 Thor Weather Sunny, light westerly winds, temps around 30F. METAR KANE 221745Z 26006KT 10SM BKN250 M01/M06 A2945= We took Thor to ACRC to gather system ID data. The controller used for all flights was the student controller. The system ID sequence used varied by run number (flight_data.run_num); the original plan was as follows: Runs 1-5: original chirps, tested previously on Loki Runs 6-10: Modified chirps, .4 to 7Hz, with pulse to help remain on trim Runs 11-15: Modified chirps, .1 to 5Hz, with pulse to help remain on trim Runs 16-18: doublets for model validation We ran into issues with the batteries having lower capacity due to the cold temperatures. Thus, we shortened the test sequence to be four runs of each chirp and only 2 doublets, and moved the low frequency chirps to second in the sequence. Runs 1-4: original chirps, tested previously on Loki Runs 5-8: Modified chirps, .1 to 5Hz, with pulse to help remain on trim Runs 9-12: Modified chirps, .4 to 7Hz, with pulse to help remain on trim Runs 13-14: doublets for model validation Amplitudes: Elevator: 4 deg for chirps, 3 deg for the doublet Aileron: 4 deg for original, high freq, doublet. 6 deg for low freq Rudder: 4 deg for chirps, 2 deg for doublet Software used was trunk/Software/FlightCode rev 777. Thor Flight 30: Elevator system ID. Continued previous flight, with modified sequence to pick up where previous flight left off. Set repeats to 4 instead of 5, 2 doublets instead of 3. Noted spiraling behavior during closed loop control- not expected since the roll angle controller is still active during the elevator movements. Theorized the nav filter was giving a bogus roll angle. Terminated flight to examine data.
Thor Flight 30.
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