Robust speed and torque estimation in electrical drives by second-order sliding modes

Author

Bartolini, Giorgio ; Damiano, Alfonso ; Gatto, Gianluca ; Marongiu, Ignazio ; Pisano, Alessandro ; Usai, Elio

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Cagliari, Italy

Volume

11

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

84

Lastpage

90

Abstract

This paper presents the synthesis and practical implementation of a robust digital differentiator that provides the first and second derivative of a sampled smooth signal. The robustness of the proposed digital device, based on second-order sliding-modes (2-SMs), is analyzed with respect to measurement errors. Experimental results on an induction motor (IM) drive show that fast and accurate estimates of speed and torque can be obtained in several operating conditions by double differentiation of the encoder position measurement.

Keywords

induction motor drives; measurement errors; stability; torque measurement; variable structure systems; velocity measurement; 2-SM; IM drive; digital device; double differentiation; electrical drives; encoder position measurement; induction motor drive; measurement errors; robust digital differentiator; robust speed estimation; robust torque estimation; robustness; sampled smooth signal; second-order sliding modes; second-order sliding-modes; Induction motors; Motor drives; Position measurement; Robustness; Sampling methods; Shafts; Sliding mode control; Spline; Torque; Velocity measurement;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/TCST.2002.806441

Filename

1173013