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. Author manuscript; available in PMC: 2006 Jan 31.

Published in final edited form as: Asian J Control. 2004 Jun;6(2):164–178. doi: 10.1111/j.1934-6093.2004.tb00195.x

Bode-Plots: left column shows the open-loop bode-plots of the system without the notch filter (dashed line), $G_{1} (s) = C_{0} (j ω) G_{\hat{x}} (j ω),$ and with the notch filter (solid line), $G_{2} (s) = C_{0} (j ω) D (s) G_{\hat{x}} (j ω),$ where G_m_,1 and G_m_,2 are the gain-margin of these two cases respectively. Right column shows the closed-loop bode plot of the system without the notch filter (dashed line, K_C = 0.00685), and with the notch filter (solid line, K_C = 1), where ω_b denotes the bandwidth of the corresponding system.