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Title: Nonlinear disturbance observer-based control for multi-input multi-output nonlinear systems subject to mismatching condition
Authors: Yang, Jun
Li, Shihua
Chen, Wen-Hua
Keywords: Disturbance attenuation
Nonlinear disturbance observer
Arbitrary disturbance relative degree
Mismatching condition
Multi-input multi-output nonlinear system
Issue Date: 2012
Publisher: © Taylor and Francis
Citation: YANG, J., LI, S. and CHEN, W-H., 2012. Nonlinear disturbance observer-based control for multi-input multi-output nonlinear systems subject to mismatching condition. International Journal of Control, 85 (8), pp. 1071 - 1082
Abstract: For a multi-input multi-output (MIMO) nonlinear system, the existing disturbance observer-based control (DOBC) only provides solutions to those whose disturbance relative degree (DRD) is higher than or equal to its input relative degree. By designing a novel disturbance compensation gain matrix, a generalised nonlinear DOBC method is proposed in this article to solve the disturbance attenuation problem of the MIMO nonlinear system with arbitrary DRD. It is shown that the disturbances are able to be removed from the output channels by the proposed method with appropriately chosen control parameters. The property of nominal performance recovery, which is the major merit of the DOBCs, is retained with the proposed method. The feasibility and effectiveness of the proposed method are demonstrated by simulation studies of both the numerical and application examples.
Description: This article was published in the serial International Journal of Control [© Taylor and Francis] and the definitive version is available at: http://www.tandfonline.com/doi/abs/10.1080/00207179.2012.675520
Version: Accepted for publication
DOI: 10.1080/00207179.2012.675520
URI: https://dspace.lboro.ac.uk/2134/11207
Publisher Link: http://www.tandfonline.com/doi/abs/10.1080/00207179.2012.675520
ISSN: 0020-7179
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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