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Dynamics of a Strongly Nonlinear Spacecraft Structure Part I: Experimental Identification

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Academic year: 2021

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Figure

Table 2: Linear resonance frequencies and damping ra- ra-tios estimated using a frequency-domain subspace  iden-tification algorithm applied to low-level random data (0.001 g 2 /Hz).
Figure 2: WEMS device. (a) Detailed description of the WEMS components; (b) simplified modeling of the WEMS mobile part considering the inertia wheel as a point mass
Figure 4: Nonlinearity detection at 0.6 g (left column) and 1 g (right column). (a – b) Envelope-based analysis; (c – d) close-up of the displacement signals.
Figure 5: Nonlinearity characterization of the WEMS device at 1 g using (a) the restoring force surface method and (b) the wavelet transform.
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