EXPERIMENTS ON THE ACTIVE AEROELASTIC TEST BENCH (AATB) FOR THE IDENTIFICATION OF UNSTEADY AERODYNAMICS

J. Ertveldt , J. Schoukens , R. Pintelon, S. Vanlanduit

DOI Number: N/A

Conference number: IFASD-2015-050

The Active Aeroelastic Test Bench (AATB) is designed for the study of low subsonic unsteady aerodynamics through forced motion experiments, as well as active aeroelastic experiments. Firstly, the forces generated on a wind tunnel model subjected to an arbitrary oscillation in pitch and plunge are measured during forced motion experiments. Secondly, operating the AATB in closed loop, allows for the emulation of different linear and nonlinear elastic behaviour of the wind tunnel model. The identiﬁcation of linear and nonlinear aerodynamic models through forced motion experiments using multisine excitation signals is discussed. For linear aerodynamic response a major time saving compared with single sine experiments is achieved. A second advantage that occurs from the possibility to use arbitrary excitation signals in the form of multisines on the AATB, is illustrated through the identiﬁcation of nonlinear distortions in the measured lift coefﬁcient spectra.

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AATB, Nonlinear, transfer function, Unsteady aerodynamics, Wind Tunnel Testing

In Categories: 2. IFASD 2015, Experimental Methods & Bridges

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