In the virtual prototyping era, it remains crucial to validate the simulation results using experimental tests. In this context, experimental modal analysis (EMA) continues to be the dominant structural dynamics method used in aerospace, civil and mechanical engineering. However, one important assumption at the root of EMA is that the structural system behaves linearly. The objective of this presentation is to discuss the recent developments in the area of control-based nonlinear vibration testing (CBNVT). Unlike current open-loop testing methodologies, CBNVT proposes a change in paradigm by operating the experiment in a closed loop. Specifically, it combines (i) feedback control to stabilize unstable orbits and (ii) path following techniques to explore - in a systematic and effective manner - the dynamics of the system directly during the experiment, i.e., without the need for a mathematical model of the system. We will also introduce a new CBNVT algorithm relying on a fully online and derivative-less experimental arclength continuation method. The algorithm will be demonstrated using both numerical simulations and experimental measurements.
In the virtual prototyping era, it remains crucial to validate the simulation results using experimental tests. In this context, experimental modal analysis (EMA) continues to be the dominant structural dynamics method used in aerospace, civil and mechanical engineering. However, one important assumption at the root of EMA is that the structural system behaves linearly. The objective of this presentation is to discuss the recent developments in the area of control-based nonlinear vibration testing (CBNVT). Unlike current open-loop testing methodologies, CBNVT proposes a change in paradigm by operating the experiment in a closed loop. Specifically, it combines (i) feedback control to stabilize unstable orbits and (ii) path following techniques to explore - in a systematic and effective manner - the dynamics of the system directly during the experiment, i.e., without the need for a mathematical model of the system. We will also introduce a new CBNVT algorithm relying on a fully online and derivative-less experimental arclength continuation method. The algorithm will be demonstrated using both numerical simulations and experimental measurements.
CEG-Lecture Hall B EURODYN2023 A.B.Faragau@tudelft.nlTechnical Issues?
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