Chatering Reduction in a Geometric Sliding Mode Method for Engineering Applications

PULESTON P.F.; VALENCIAGA F.

Salvador, Bahía, Brasil

Congreso; XVI Brazilian Automation Conference y XII Latin-American Congress on Automatic Control; 2006

Departamento de Engenharia Elétrica (DEE) da Universidade Federal da Bahia (UFBA)

This paper focuses on the reduction of chattering in a robust non-linear sliding mode control. It develops, in an accessible way, an enhanced control design method, suitable for a wide range of engineering applications, namely those that accept a certain degree of discontinuous action in their input and that can be described as non-linear systems affine in the control with a vector of bounds for the uncertainties. The proposed systematic method is based on the geometric approach followed by the authors in a previous work. This new proposal reduces the chattering, while maintaining the attractive features of the original method, those are: robustness, tuning simplicity and reaching mode control. Taking advantage of these attributes, a robust lowchattering controller for autonomous wind energy conversion system is developed.