Wheel shimmy suppression through the piecewise nonlinear energy sink: elimination of detrimental isolas - presented by Prof. Giuseppe Habib

Wheel shimmy suppression through the piecewise nonlinear energy sink: elimination of detrimental isolas

Prof. Giuseppe Habib

Prof. Giuseppe Habib
Slide at 04:54
NODYCON 2025 Shimmy Suppression: TMD and C-NES 0.08 Without NES 0.07 The tuned TMD has a better performance, but the C-NES(Case1) change of the system parameter causes it to be 0.06 C-NES(Case2) TMD(detuned) detuned. 0.05 undesired isola Fourth International Nonlinear Dynamics Conference AΘ [rad] 0.04 The performance of the C-NES is affected by the undesired isola. 0.03 0.02 0.01 Weaknesses of TMD and C-NES u [m/s] Although the tuned TMD suppresses the kg =889N/m3 C2 =11 12Ns/m. u=24m's kg =889N/m3 C2 =11 12Ns/m. u=24m/s shimmy at large perturbations, it has less Shimmy angle [rad] 0.05 Shimmy angle [rad] 0.05 robustness, i.e., the small variation of -0.05 -0.05 -0.1 -0.1 parameters might detune the TMD. 0.02 NES displacement [m] NES displacement m) The C-NES is more robust than TMD, but it 0.01 -0.01 has a bad performance at large perturbations, -0.02 i.e., affected by the undesired isola. 6/18/2025
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Summary (AI generated)

The performance analysis of the Tuned Mass Damper (TMD) and the Controlled Nonlinear Energy Sink (C-NES) demonstrates distinct characteristics. The tuned TMD exhibits superior performance; however, its sensitivity to system parameter changes can lead to detuning. In contrast, the performance of the C-NES is compromised by the presence of undesired isolation.

In summary, the weaknesses of both systems are evident. While the tuned TMD effectively suppresses shimmy under large perturbations, it lacks robustness, as even minor parameter variations can result in detuning. Conversely, the C-NES offers greater robustness compared to the TMD, but its performance deteriorates under large perturbations due to the influence of undesired isolation.