caa a22 4500 606159495 CHVBK 20210128100625.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00521-014-1748-0 doi (NATIONALLICENCE)springer-10.1007/s00521-014-1748-0 Soft variable structure controller design for constrained systems based on S-class functions [Elektronische Daten] [Yunlong Liu, Shanmao Gu, Yonggui Kao, Shuhong Tang] A soft variable structure control (SVSC) strategy based on S-class functions is addressed in this paper. Firstly, the definition of SVSC strategy is given, the structure of SVSC system under constrained control input is analyzed, and S-class functions with smoothness, strict monotonicity, and saturation are presented. Secondly, the sufficient condition on the stability of SVSC system is obtained by Lyapunov stability theory. A soft variable structure controller based on S-class functions is developed aiming at optimizing the smoothness problem of the SVSC systems based on variable saturations, and the chattering problem of sliding mode control (SMC) systems. Then, the concrete algorithm on SVSC strategy based on sigmoid functions is obtained. Finally, a simulation example is carried out to verify the feasibility and effectiveness of the SVSC strategy, and compared with SMC strategy, high regulation rate is achieved, settling time is shorted, and the system chattering can be reduced by the proposed strategy. The Natural Computing Applications Forum, 2014 Nonlinear control nationallicence Soft variable structure control nationallicence Sliding mode control nationallicence S-class function nationallicence Constrained nationallicence Liu Yunlong College of Information and Control Engineering, Weifang University, 261061, Weifang, People's Republic of China aut Gu Shanmao College of Information and Control Engineering, Weifang University, 261061, Weifang, People's Republic of China aut Kao Yonggui Department of Mathematics, Harbin Institute of Technology, 264209, Weihai, People's Republic of China aut Tang Shuhong College of Information and Control Engineering, Weifang University, 261061, Weifang, People's Republic of China aut Neural Computing and Applications Springer London 26/3(2015-04-01), 705-711 0941-0643 26:3<705 2015 26 521 https://doi.org/10.1007/s00521-014-1748-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00521-014-1748-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Yunlong College of Information and Control Engineering, Weifang University, 261061, Weifang, People's Republic of China aut NATIONALLICENCE 700 1- Gu Shanmao College of Information and Control Engineering, Weifang University, 261061, Weifang, People's Republic of China aut NATIONALLICENCE 700 1- Kao Yonggui Department of Mathematics, Harbin Institute of Technology, 264209, Weihai, People's Republic of China aut NATIONALLICENCE 700 1- Tang Shuhong College of Information and Control Engineering, Weifang University, 261061, Weifang, People's Republic of China aut NATIONALLICENCE 773 0- Neural Computing and Applications Springer London 26/3(2015-04-01), 705-711 0941-0643 26:3<705 2015 26 521