Improved disturbance rejection for MIMO systems with output time delays

This paper presents a new control structure for improved rejection of unknown step disturbances in multiple-input-multiple-output systems with multiple time delays. After a review of published work extending the Smith predictor for MIMO systems, the new control structure is presented using estimated...

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Bibliographic Details
Main Authors: Doering, J.A., Parker, G.G.
Format: Conference Proceeding
Language:English
Subjects:
Chemical industry
Chemical sensors
Control systems
Delay effects
Delay estimation
Error correction
Feedback loop
Fluid flow control
MIMO
State estimation
Online Access:Request full text
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Summary:This paper presents a new control structure for improved rejection of unknown step disturbances in multiple-input-multiple-output systems with multiple time delays. After a review of published work extending the Smith predictor for MIMO systems, the new control structure is presented using estimated and actual system outputs for output error prediction but using state-space control methods for the undelayed synthetic feedback loop. This new structure is applied to a simple example, demonstrating improved disturbance rejection (approximately half the integrated square error) and less sensitivity to mismatch in time delay estimates.
ISSN:0743-1619
2378-5861
DOI:10.1109/ACC.2000.878633