Abstract
Uncertainty and disturbance (UAD) always exist and influence negatively on technical systems. Focusing on improving the effectiveness of smart dampers (SDs)-based semi-active train-car suspensions (SD-TCSs), we present the fuzzy-compensator-enhanced fractional-derivative (FD) order sliding control of a class of SD-TCSs subjected to UAD, in which the disturbance time-varying rate (DTVR) may be high but bounded. To reduce uncertainty related to the mathematical model error, we propose a fractional derivative (FD)-based sliding mode controller (FDSMC) for specifying the main control signal. Whereas, to estimate the compensation for external disturbance, first, we utilize the well-known DO to build an initial framework of the compensator. To avoid conflict between the update-laws of the DO and FDSMC, as well as to make the system dynamic response converge stably to the desired state even if the DTVR increasing but bounded, constraints along with a fuzzy-based adjusting mechanism are then discovered. Thus, we obtain an improved DO (imDO), update-laws of the imDO and FDSMC, and their combination model (imDO-FDSMC) of the proposed controller. The survey results reflect the positive capability of the method.
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This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant Number 107.01-2019.328.
Sy Dzung Nguyen received his M.E. degree in manufacturing engineering from Ho Chi Minh City University of Technology (HCMUT) — VNU in 2001, a Ph.D. degree in applied mechanics in 2011 from HCMUT. He was a postdoctoral fellow at Inha University, Korea, 2011–2012, at Incheon National University, Korea, 2015–2016. He is currently a Head of Division of Computational Mechatronics (DCME), Institute for Computational Science (INCOS), Ton Duc Thang University (TDTU), Vietnam. His research interests include artificial intelligence and its applications to nonlinear adaptive control, system identification, and managing structure damage. Dr. Nguyen has been the main author of plenty of ISI papers in these fields.
Vien Quoc Nguyen received his B.E. and M.E. degrees in automatic control engineering from Ho Chi Minh City University of Technology (HCMUT), Vietnam, in 1998 and 2003. He received a Ph.D. degree in mechanical engineering in 2010 from Inha University, Korea. He is currently with the Mechatronic Division, Faculty of Mechanical Engineering at Industrial University of Ho Chi Minh City, Vietnam. His research interests include nonlinear adaptive control, vibration control, smart materials, and their applications.
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Nguyen, S.D., Nguyen, V.Q. SD-TCSs Control Deriving from Fractional-order Sliding Mode and Fuzzy-compensator. Int. J. Control Autom. Syst. 20, 1745–1755 (2022). https://doi.org/10.1007/s12555-020-0115-4
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DOI: https://doi.org/10.1007/s12555-020-0115-4