Adaptive neural control for a class of time-delay systems in the presence of backlash or dead-zone non-linearity

作者：Liu, Zongcheng^*; Dong, Xinmin; Xue, Jianping; Chen, Yong

来源：IET Control Theory and Applications, 2014, 8(11): 1009-1022.

DOI：10.1049/iet-cta.2013.0903

• OUTPUT-FEEDBACK CONTROL
• DYNAMIC SURFACE CONTROL
• PLANTS

This study addresses the adaptive tracking control problem for a class of time-delay systems in strict-feedback form with unknown control gains and uncertain actuator non-linearity. The actuator non-linearity can be either backlash or dead zone, and the proposed approach does not require the knowledge of the bounds of non-linearity parameters. By applying an appropriate Lyapunov-Krasovskii functional and utilising the property of the well-defined trigonometric functions, the problems of time delay and controller singularity are avoided. The feasibility of using a static neural network to attenuate the effect of actuator non-linearity is proved with the aid of intermediate value theorem. Furthermore, it is proved that all closed-loop signals are bounded and the tracking error converges to a small residual set asymptotically. Two simulation examples are provided to demonstrate the effectiveness of the designed method.

• 出版日期2014-7-17
• 单位中国人民解放军空军工程大学