Using Tracking Differentiators in Designing Nonlinear Disturbance Observers for Uncertain Systems

Subject Areas : journal of Artificial Intelligence in Electrical Engineering

Nasser Kazemzadeh ¹ , Saeed Barghandan ²

1 - Department of Electrical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran
2 - Department of Electrical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran

Received: 2016-08-11 Accepted : 2016-10-11 Published : 2016-11-01

Keywords: non-linear systems, uncertain disturbances, non-linear disturbance observer (NDO), tracking differentiator,

Abstract :

Using Tracking Differentiators in Designing Nonlinear Disturbance Observers for Uncertain SystemsNaser Kazemzadeh, Saeed BarghandanAbstractIn the present paper, a practical designing method has been proposed for a novel class of NDOs based on TD. Such NDOs can nearly estimate all uncertain disturbances (specifically disturbances without prediction information). Regarding the outstanding performance of TD filter not requiring a precise dynamic model, the proposed NDO can estimate external disturbance and not modeled dynamics. The results showed the superiority of the proposed method in estimating disturbance and improvement of control quality.Keywords: non-linear systems, uncertain disturbances, non-linear disturbance observer (NDO), tracking differentiator