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A comparison of the Smith predictor and conventional feedback control

✍ Scribed by C. Meyer; D.E. Seborg; R.K. Wood

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
363 KB
Volume
31
Category
Article
ISSN
0009-2509

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✦ Synopsis

The utility of employing the Smith predictor versus conventional proportional plus integral control for a control loop containing time delays in both the forward and feedback paths has been examined. A theoretical analysis and simulation results employing first order load and process transfer functions for load and setpoint changes are presented. For setpoint changes the Smith predictor always gave improved performance compared to proportional nlus integral control. However, for load changes, the Smith predictor was less effective when the system contained small time delays and/or a large load time constant.

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