Figure 11

Three-dimensional plots of the influence of the mass ratio \({{\varvec{\mu}}}_{{\varvec{b}}}\) on the frequency response function of the system. (a) Left building of system based on NSID-1. (b) Left building of system based on NSID-2. (c) Right building of system based on NSID-1. (d) Right building of system based on NSID-2