Fuzzy Control of Switched Systems With Unknown Backlash and Nonconstant Control Gain: A Parameterized Smooth Inverse

作者：Chen, Yanxian; Liu, Zhi^*; Chen, C. L. Philip; Zhang, Yun

来源：IEEE Transactions on Fuzzy Systems, 2022, 30(11): 4876-4890.

DOI：10.1109/TFUZZ.2022.3162418

• Control systems
• Switched systems
• Switches
• Lyapunov methods
• Fuzzy logic
• Nonlinear systems
• Fuzzy sets
• Adaptive control
• backlash nonlinearities
• barrier Lyapunov BLF)
• fuzzy logic systems
• switched systems

This article addresses fuzzy tracking control question when switched systems are subjected to unknown input backlash, nonconstant control gain, and asymmetric full-state constraints. A new mode-dependent integral barrier Lyapunov MIBLF) can handle conservative feasibility conditions that only assure asymmetric full-state constraints and all subsystems share a common controller. To handle unknown input backlash nonlinearities in the presence of unknown nonconstant control gain function, fuzzy logic systems are utilized and a new parameterized smooth backlash inverse (PSBI) is presented. It is hard to construct the barrier Lyapunov function-based controller in the presence of unknown backlash, switching framework, and full-state constraints. By employing the fuzzy logic systems and the PSBI, a novel MIBLF-based adaptive fuzzy controller is presented to overcome this challenge. Furthermore, the presented controller not only prevents violation of all constrained states, but also ensures the boundedness of the closed-loop system. Eventually, feasibility of achieved theoretical results can be proven by two examples.

• 单位
  广东工业大学