Ex. 1472. The plant of a magnetic-gap controller is: Gp(s)=1/((s+f)(s-f)). A controller Gc(s)=K(s+b)(s+c)/s is proposed. Determine the gain K for marginal stability. b=0.50, c=101.00, f=61.30. Determine the gain K for CLGM=10.8 dB. Gp & Gs are in the forward path of unity feedback sys. ans:2

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