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Table 1
Port-Hamiltonian formulation (3) for the Thiele–Small structure as depicted in Figure 2, with magnetic flux in the coil ϕC, diaphragm position qD and momentum 
. The physical parameters are given in Tables D1.
| Storage | ||
| State: | Energy: | |
| x = (ϕC, pM, qD)T |  | |
| Dissipation | ||
| Variable: | Law: | |
 |
 | |
| Ports | ||
| Input: | Output: | |
 |
 | |
| Structure | ||
 ,  , | ||
Gx = (1,0,0)T,  ,  , Jy = 0. | ||
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