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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/21201

Title: On relationship between time-domain and frequency-domain disturbance observers and its applications
Authors: Su, Jinya
Chen, Wen-Hua
Yang, Jun
Keywords: Functional Disturbance OBserver (FDOB)
Reduced order
Non-minimum phase
Time/frequency domain design
Issue Date: 2016
Publisher: © American Society of Mechanical Engineers (ASME)
Citation: SU, J., CHEN, W-H. and YANG, J., 2016. On relationship between time-domain and frequency-domain disturbance observers and its applications. Journal of Dynamic Systems Measurement and Control: Transactions of the ASME, 138 (9), paper 091013.
Abstract: This paper provides a generic analysis of the relationship between time/frequency-domain DOB design methodology. It is discovered that the traditional frequency-domain DOBs using a low pass filter with unity gain can only handle disturbances satisfying matching condition, while the traditional time-domain DOBs always generate an observer with a high order. A Functional Disturbance OBserver (FDOB) is proposed to improve the existing results together with its design guideline, frequency analysis and existence condition. Compared with the existing frequency-domain DOBs, the proposed FDOB can handle more classes of disturbances, while compared with the existing time-domain DOBs the proposed FDOB can generate an observer with a lower order. Numerical examples are presented to illustrate the main findings of this paper including a rotary mechanical system of nonminimum phase.
Description: This paper is embargoed until June 2017.
Sponsor: This work was jointly funded by UK Engineering and Physical Sciences Research Council (EPSRC) and BAE Systems EP/H501401/1).
Version: Accepted for publication
DOI: 10.1115/1.4033631
URI: https://dspace.lboro.ac.uk/2134/21201
Publisher Link: http://dx.doi.org/10.1115/1.4033631
ISSN: 1528-9028
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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