Article | Proceedings of the 10<sup>th</sup> International Modelica Conference; March 10-12; 2014; Lund; Sweden | Exploiting Actuator Limits with Feedforward Control based on Inverse Models
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Title:
Exploiting Actuator Limits with Feedforward Control based on Inverse Models
Author:
Manuel Gräber: TLK-Thermo GmbH, Braunschweig, Germany
DOI:
10.3384/ecp14096637
Download:
Full text (pdf)
Year:
2014
Conference:
Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden
Issue:
096
Article no.:
067
Pages:
637-645
No. of pages:
9
Publication type:
Abstract and Fulltext
Published:
2014-03-10
ISBN:
978-91-7519-380-9
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


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Feedforward control based on inverse dynamic plant models (linear or nonlinear) is a suitable method to enhance set-point tracking performance of control systems. In reality actuators always have limits; but limiting functions can not be inverted. A common approach to handle this issue is to invert the unlimited plant model and detune the feedforward filter in order to stay always in between the actuator limits. This approach causes a loss in performance for rapid set-point changes; because the actuator range is not entirely used. In this article a rather simple but powerful method is presented; which overcomes this performance issue for many types of plant models. Actuator limits are fully exploited; and the obtained trajectories are close to optimal ones. Simulation and measurement results demonstrate the usability of the proposed feedforward structure.

Keywords: Set-point tracking; model inversion; actuator saturation; nonlinear control; model-based control; anti-windup

Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Author:
Manuel Gräber
Title:
Exploiting Actuator Limits with Feedforward Control based on Inverse Models
DOI:
http://dx.doi.org/10.3384/ecp14096637
References:

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Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Author:
Manuel Gräber
Title:
Exploiting Actuator Limits with Feedforward Control based on Inverse Models
DOI:
http://dx.doi.org/10.3384/ecp14096637
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