In the above paper (A. Ghaffari et al., IEEE Trans. Automat. Contr., vol. 48, pp. 18-29, Jan. 2003) an example was given for which it was claimed that there exists no optimal Petri net-based (monitor) ...

Rotor time constant identification is necessary for high-performance indirect field oriented control of induction motor drives. Meanwhile, speed sensorless technique has many advantages such as low ...