1991-09-01

Functional Mock-Up Tests for Flight Control System of the NAL QSTOL Research Aircraft ‘ASKA’ 912036

Control system functional mock-up tests were conducted with ASKA, a quiet short take-off and landing aircraft.Simulation was effectively simplified by omitting the control system right half side and shortening the system's straight sections. Characteristic differences were compensated for by changing cable tension, with simulation “fidelity” being sufficient to check each area of concern. All test measurements were precisely taken, and a “filtering sampler,” an anti-aliasing device/technique, was newly designed and used for digital data acquisition.The mock-up tests significantly contributed to the control system development by providing data to refine the stability and control augmentation system, by enabling accomplishment of system and component clearance tests, by determining unexpected phenomena, and by allowing performance of experimental studies on possible critical problems.

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