again the two-mass/spring/damper system shown in Figure 0.1. Assume that
control force, F2is the disturbance force, and the
measurements of x1and x2are corrupted by measurement noise:
objective is to design a control law so that the effect of the disturbance force F2on the
positions of the two masses x1and x2, are reduced in a
frequency range 0ŁwŁ2.