Adaptive fuzzy prescribed performance control for MIMO nonlinear systems with unknown control direction and unknown dead-zone inputs

作者：Shi, Wuxi^*; Luo, Rui; Li, Baoquan

来源：ISA Transactions, 2017, 66: 86-95.

DOI：10.1016/j.isatra.2016.08.021

• MIMO nonlinear systems
• Fuzzy control
• Adaptive control
• Prescribed performance
• Unknown control direction
• Unknown dead-zone inputs

In this study, an adaptive fuzzy prescribed performance control approach is developed for a class of uncertain multi-input and multi-output (MIMO) nonlinear systems with unknown control direction and unknown dead-zone inputs. The properties of symmetric matrix are exploited to design adaptive fuzzy prescribed performance controller, and a Nussbaum-type function is incorporated in the controller to estimate the unknown control direction. This method has two prominent advantages: it does not require the priori knowledge of control direction and only three parameters need to be updated on-line for this MIMO systems. It is proved that all the signals in the resulting closed-loop system are bounded and that the tracking errors converge to a small residual set with the prescribed performance bounds. The effectiveness of the proposed approach is validated by simulation results.

• 出版日期2017-1
• 单位天津工业大学