Title :
Variable structure sliding mode based unknown input observer for speed identification of brushless DC motors
Author :
Yan, Weisheng ; Lin, Hai ; Wang, Ming ; Li, Xiaochuan ; Li, Mei ; Wang, Yintao
Author_Institution :
Fac. of Mech. Eng. & Autom. Control, Northwestern Polytech. Univ., Xi´´an, China
Abstract :
A variable structure sliding mode unknown input observer (VSSM-UIO) is investigated to estimate the speed of permanent magnet brushless DC motor (BLDC) in this paper, which features in very good robustness to the parameters uncertainty and disturbance. Using the phase voltage mathematical model of BLDC, the observer is deduced by supposing back-EMF as an input disturbance, which has a good performance of speed and rotor position identification. By means of the designed Lyapunov function, the observer is proved to be stable in the infinite time and robust, even if the load torque disturbance, the parameter uncertainties exist. Simulation results show the validity of the proposed strategy.
Keywords :
Lyapunov methods; brushless DC motors; electric potential; observers; permanent magnet motors; rotors; variable structure systems; velocity control; voltage control; Lyapunov function; back electromotive force; back-EMF disturbance; brushless DC motors; permanent magnet motor; phase voltage mathematical model; rotor position identification; speed identification; unknown input observer; variable structure sliding mode control; Brushless DC motors; DC motors; Frequency estimation; Mechanical engineering; Robustness; Rotors; Sensorless control; Stators; Velocity control; Voltage;
Conference_Titel :
Robotics and Biomimetics (ROBIO), 2009 IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4244-4774-9
Electronic_ISBN :
978-1-4244-4775-6
DOI :
10.1109/ROBIO.2009.5420463
