NDLI: Adaptive fuzzy sliding control enhanced by compensation for explicitly unidentified aspects

Content Provider	Springer Nature Link
Author	Nguyen, Sy Dzung Choi, Seung Bok Seo, Tae Il
Copyright Year	2017
Abstract	Reality shows that 1) the effectiveness of compensators for uncertainty and disturbance (UAD) depends deeply on UAD’s time varying rate (TVR), and 2) controlling a system over a network introduces different constraints and conditions, in which some of these are variable delays in control signal, packet losses, data quantization, safety, and security. This paper presents a new design of fuzzy sliding mode control (FSMC) enhanced by compensation for UAD using a disturbance observer (DO), named DO-FSMC, for a class of nonlinear systems subjected to UAD. First, in order to weaken partly the negative influence of TVR of UAD on the compensation effectiveness, we separate explicitly unidentified aspects into two groups, one related to the model error while the other coming from external disturbances, to distinctly consider. To stamp out the chattering status and reduce calculating cost, we propose an adaptive gain updated directly based on the sliding surface convergence status, to which two new control laws, one for the FSMC and the other for the DO-FSMC, are given via Lyapunov stability analysis. In order to evaluate the DO-FSMC, simulations as well as surveys based on a real semi-active suspension system using a Magnetorheological damper (MRD) with measured datasets are performed. The results obtained from the surveys coincide with the theoretical analysis which show that the competence to stamp out vibration is the advantage of the proposed method compared with the other published methods.
Starting Page	2906
Ending Page	2920
Page Count	15
File Format	PDF
ISSN	15986446
Journal	International Journal of Control, Automation and Systems
Volume Number	15
Issue Number	6
e-ISSN	20054092
Language	English
Publisher	Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers
Publisher Date	2017-10-07
Publisher Place	Bucheon, Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Disturbance observer fuzzy sliding control nonlinear system uncertainty and disturbance estimator Control, Robotics, Mechatronics
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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