Name ________________________________ Mailbox ______________ ECE-320, Quiz #6 Problems 1-3 refer to the following root locus plot for a unity feedback system with a plant and a controller. -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1-20-15-10-505101520Root Locus Editor for Open Loop 1 (OL1)Real AxisImag Axis1) Based on this root locus plot, the best estimate of the poles of the closed loop system are a) -0.3+j7, -0.3-j7, -0.6 b) 1+j2, 1-j2, and -3 2) Is this a type one system? a) yes b) no 3) Is this a stable system? a) yes b) noName ________________________________ Mailbox ______________ 4) Consider the following root locus plot for a plant and controller in a unity feedback configuration. If we want the system to be stable, should we a) increase the gain b) decrease the gain c) do nothing -5 -4 -3 -2 -1 0 1 2 3 4 5-5-4-3-2-1012345Root Locus Editor for Open Loop 1 (OL1)Real AxisImag AxisName ________________________________ Mailbox ______________ 5) Assume we are adding a lag compensator to change the steady state error for a ramp input, as shown below 2(1)ss+szsp++ 10( 10)20ss++ +- If we want the steady state error for a unit ramp input to be 0.001 and we choose z = 0.1, what should p be? a) 1 b) 0.1 c) 0.01 d) 0.001 6) With the lag compensator in the system (as shown in problem 5) do we expect the settling time of the system to a) increase b) decrease c) remain the
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