Hybrid Neural Network Cerebellar Model Articulation Controller Design for Non-linear Dynamic Time-Varying Plants

Tien-Loc Le; Tuan-Tu Huynh; Sung-Kyung Hong; Chih-Min Lin

doi:10.3389/fnins.2020.00695

Hybrid Neural Network Cerebellar Model Articulation Controller Design for Non-linear Dynamic Time-Varying Plants

Front Neurosci. 2020 Jul 28:14:695. doi: 10.3389/fnins.2020.00695. eCollection 2020.

Authors

Tien-Loc Le^{1

2}, Tuan-Tu Huynh^{2

3}, Sung-Kyung Hong¹, Chih-Min Lin³

Affiliations

¹ Faculty of Mechanical and Aerospace, Sejong University, Seoul, South Korea.
² Department of Electrical Electronic and Mechanical Engineering, Lac Hong University, Bien Hoa, Vietnam.
³ Department of Electrical Engineering, Yuan Ze University, Taoyuan, Taiwan.

Abstract

This study proposes a hybrid method to control dynamic time-varying plants that comprises a neural network controller and a cerebellar model articulation controller (CMAC). The neural-network controller reduces the range and quantity of the input. The cerebellar-model articulation controller is the main controller and is used to compute the final control output. The parameters for the structure of the proposed network are adjusted using adaptive laws, which are derived using the steepest-descent gradient approach and back-propagation algorithm. The Lyapunov stability theory is applied to guarantee system convergence. By using the proposed combination architecture, the designed CMAC structure is reduced, and it makes it easy to design the network size and the initial membership functions. Finally, numerical-simulation results demonstrate the effectiveness of the proposed method.

Keywords: adaptive control; cerebellar model articulation controller; neural network; non-linear system; time-varying plants.