With referenceto the system of Fig. 4.15, a horizontal force f (t) = F₀ cos ω_f t is applied to theframe, that causes the system to oscillate with a “small-amplitude” motion. Obtainan expression for the magnitude and the phase angle of the rod angle θ vs. ω_f, andsketch the corresponding Bode plots for light damping. Discuss the cases (1) c → 0and (2) k → 0.

Figure 4.15

Transcribed Image Text:

No friction -m, h k frim Sorting C m Fig. 4.15 A mechanical system mounted on an air cushion f=fm cos @ft