Traditionally, servo engineers have designed discrete-time lead compensators by first designing a lead compensator in the w-domain, and then converted to the z-domain by using a bilinear transformation with frequency prewarping. This technical note presents two new simple formulas for determining the zero and the pole of a discrete-time lead compensator directly in the z-domain from the desired maximum phase lead and the desired frequency at which that phase lead should occur. [S0022-0434(00)01502-1]

Issue Section:
Technical Briefs
Keywords:
discrete time systems, compensation, control system synthesis, servomechanisms, transforms, poles and zeros
Topics:
Design, Poles (Building), Servomechanisms, Discrete time systems
1.
Nise, N., 1995, Control Systems Engineering, Benjamin/Cummings.
2.
Franklin, G., Powell, J., and Workman, M., 1997, Digital Control of Dynamic Systems, Addison-Wesley.
Copyright © 2000
 by ASME
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