The purpose of the suspension (see (9) in Fig. 6.1
) is to provide a linear restoring force that moves the coil back to its rest position and to ensure that it is correctly centered. However, from Fig. 6.21a
, we see that for large excursions, the suspension becomes stiffer as it stretches and so the compliance becomes nonlinear, typically in an asymmetrical manner, as shown in Fig. 6.21b
. It ...