l25 - 16.06 Lecture 25 Compensator Design Karen Willcox...

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16.06 Lecture 25 Compensator Design Karen Willcox November 3, 2003 Today’s Topics 1. Phase-lag compensator design 2. PID control 3. PD control Reading : 6.5, l.n. 1
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1 Phase-lag compensator design The design procedure for a phase-lag compensator is as follows: 1. Draw the root loci for a proportional gain controller 2. Determine the desired position of the dominating pair of closed-loop poles on these loci from the specifications. 3. Determine the root locus gain at the position (using the magnitude condition) and hence the value of K c for P-control. 4. For this value of K c , determine the value of the factor z/p needed to satisfy the specifications on steady-state accuracy. 5. Choose p and z with this ratio and close enough to the origin that the vector angles to the dominant poles differ only a few degrees. 6. Draw the loci of the compensated system and find the dominating poles.
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This note was uploaded on 03/03/2010 for the course EE EE3530 taught by Professor Aravena during the Spring '10 term at LSU.

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l25 - 16.06 Lecture 25 Compensator Design Karen Willcox...

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