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On reference governor in iterative learning control for dynamic systems with input saturation

On reference governor in iterative learning control for dynamic systems with input saturation
On reference governor in iterative learning control for dynamic systems with input saturation
Input saturation is inevitable in many engineering applications. Most existing iterative learning control (ILC) algorithms that can deal with input saturation require that the reference signal is realizable within the saturation bound. For engineering systems without precise models, it is hard to verify this requirement. In this note, a “reference governor” (RG) is introduced and is incorporated with a range of existing ILC algorithms (primary ILC algorithms). The role of the RG is to re-design the reference signal so that the modified reference signal is realizable. Two types of the RG are proposed: one modifies the amplitude of the reference signal and the other modifies the frequency. Our main results provide design guidelines for two RGs. Moreover, a design trade-off between the convergence speed and tracking performance is also discussed. A simple simulation result verifies the effectiveness of the proposed methods.
0005-1098
2412-2419
Tan, Ying
23bafadb-0655-48fe-9937-c59f01cb58ab
Xu, Jian-Xin
11c9c81e-64c9-4774-9ea2-d7a95a5f3ec1
Norrlof, Mikael
f9d7dfc5-66b2-49c4-9556-833419ce5aaf
Freeman, Christopher
ccdd1272-cdc7-43fb-a1bb-b1ef0bdf5815
Tan, Ying
23bafadb-0655-48fe-9937-c59f01cb58ab
Xu, Jian-Xin
11c9c81e-64c9-4774-9ea2-d7a95a5f3ec1
Norrlof, Mikael
f9d7dfc5-66b2-49c4-9556-833419ce5aaf
Freeman, Christopher
ccdd1272-cdc7-43fb-a1bb-b1ef0bdf5815

Tan, Ying, Xu, Jian-Xin, Norrlof, Mikael and Freeman, Christopher (2011) On reference governor in iterative learning control for dynamic systems with input saturation. Automatica, 47 (11), 2412-2419.

Record type: Article

Abstract

Input saturation is inevitable in many engineering applications. Most existing iterative learning control (ILC) algorithms that can deal with input saturation require that the reference signal is realizable within the saturation bound. For engineering systems without precise models, it is hard to verify this requirement. In this note, a “reference governor” (RG) is introduced and is incorporated with a range of existing ILC algorithms (primary ILC algorithms). The role of the RG is to re-design the reference signal so that the modified reference signal is realizable. Two types of the RG are proposed: one modifies the amplitude of the reference signal and the other modifies the frequency. Our main results provide design guidelines for two RGs. Moreover, a design trade-off between the convergence speed and tracking performance is also discussed. A simple simulation result verifies the effectiveness of the proposed methods.

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Published date: 1 January 2011
Organisations: EEE

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Local EPrints ID: 271611
URI: http://eprints.soton.ac.uk/id/eprint/271611
ISSN: 0005-1098
PURE UUID: 36ad8dd8-28a3-4f45-b1c7-8a1a59e3325b

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Date deposited: 03 Oct 2010 10:42
Last modified: 19 Jul 2019 22:12

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