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Original Article

Table 3

Port-Hamiltonian formulation (3) for the model 1 depicted in Figure 6. The linear stiffness is replaced by the Kelvin–Voigt modeling of the creep effect from Section 3.1 in serial connection with the nonlinear spring described in Section 3.2, with diaphragm position , momentum , primary elongation , and creep elongation . The nonlinear potential energy is given in (11). Parameters are given in Tables 4 and D1, with and .

State: Energy:

Variable: Law:

Input: Output:

, ,
, , , .

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