Jian Zhang, Yubao Yang, Zhijia Zhao*, and Keum-Shik Hong
International Journal of Control, Automation, and Systems, vol. 21, no. 1, pp.318-327, 2023

Abstract : This paper investigates an adaptive neural network control strategy for a two-degree-of-freedom helicopter system with input saturation and unknown external disturbances. Firstly, the radial basis function neural network is used to compensate the uncertainty and input saturation error of the system. Furthermore, a disturbance observer is designed to deal with complex disturbances composed of unknown disturbances and neural network errors. By constructing and analyzing the Lyapunov function, the stability of the helicopter system is strictly guaranteed. Finally, the numerical simulations and experiments conducted on the Quanser laboratory platform reveal that the proposed control strategy is suitable and effective.

Keyword : Adaptive neural network control, external disturbances, input saturation, 2-DOF helicopter.