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Fuzzy disturbance observer design for a class of nonlinear SISO systems

Hou, Q., Ma, L., Wang, H.ORCID: 0000-0003-2789-9530 and Ding, S. (2021) Fuzzy disturbance observer design for a class of nonlinear SISO systems. International Journal of Fuzzy Systems .

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In this paper, a novel fuzzy disturbance observer (DOB) is designed for a class of nonlinear single-input–single-output (SISO) systems. The main feature of the proposed DOB lies in that only the control input and system output information is required. According to the output information and mathematical model of the original SISO system, an auxiliary system is constructed to estimate the disturbance. The estimation result is generated by comparing the control input of the original system with the input variable of the auxiliary system. On this basis, a fuzzy logic controller is introduced to obtain the time-varying parameter such that the estimation error can be automatically minimized. Then, the design method of the aforementioned fuzzy DOB is systematically described through a numerical example and the continuous stirred tank reactor system. Finally, a fuzzy DOB based composite controller is presented for the missile roll stabilization system to verify its effectiveness in practical engineering.

Item Type: Journal Article
Murdoch Affiliation(s): Engineering and Energy
Publisher: Chinese Fuzzy Systems Association
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