Design of PAM and PWM Controllers for Sampled-Data Interval Systems

[+] Author and Article Information
Leang-san Shieh, Wei-min Wang

Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204-4793

John W. Sunkel

Navigation, Control, and Aeronautics Division, EG2, NASA Johnson Space Center, Houston, TX 77058

J. Dyn. Sys., Meas., Control 118(4), 673-682 (Dec 01, 1996) (10 pages) doi:10.1115/1.2802342 History: Received June 13, 1995; Online December 03, 2007


In this paper, we address two issues: digital redesign of a continuous-time interval system using an interval chebyshev quadrature approximation method; and translation of the newly digitally redesigned pulse-amplitude modulated (PAM) controller into an equivalent pulse-width modulated (PWM) controller via a second-order Taylor-series approximation method. Using this new interval digital redesign technique, the dynamic states of the digitally controlled sampled-data interval system are able to closely match those of the original analogously controlled continuous-time uncertain system. Three illustrative examples are provided to demonstrate the effectiveness of the proposed methods.

Copyright © 1996 by The American Society of Mechanical Engineers
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