Open AccessSupplemental state observer‐based sliding mode control for a dynamic system
Author(s) -
Chen KunYung
Publication year - 2021
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/cth2.12142
Subject(s) - control theory (sociology) , state observer , sliding mode control , observer (physics) , state vector , state (computer science) , computer science , robust control , control engineering , control system , engineering , control (management) , nonlinear system , algorithm , artificial intelligence , physics , quantum mechanics , classical mechanics , electrical engineering
A supplemental state observer‐based sliding mode control (SSOBSMC) for a dynamic system is proposed in this paper. First, a supplemental state vector is formulated including system output and supplemental output. A supplemental state observer (SSOB) is proposed to estimate the unavailable states. Furthermore, the SSOBSMC consisting of SSOB and sliding mode control (SMC) is proposed to perform state estimation and robust tracking control for the dynamic system with some unavailable states. To demonstrate the application of the proposed methods, a mass‐spring‐damper (MSD) system is used as an application example to perform numerically. From the simulation results, the SSOB shows a good ability for state estimation, while the SSOBSMC simultaneously demonstrates accuracy in state estimation ability as well as a robust tracking control performance for the non‐linear MSD system. The major contributions of this paper are the proposed SSOB that can accurately estimate the unavailable states for the non‐linear dynamic system with time‐varying disturbances; and the SSOBSMC, which simultaneously displays accuracy in state estimation ability and robust tracking control performance.