3C. Schauder. Adaptive speed identification for vector control of induction motors without rotational transducer [ J ]. IEEE Trans. Ind Applicat, 1992, 128: 1054-1061.
4K. Akatsu, A. Kawamura. Sensorless Very Low-Speed and Zero-Speed Estimations with Online Rotor Resistance Estimation of Induction Motor Without Signal Injection [J]. IEEE Trans. Ind. Application, 2000, 36 (3): 764 - 770.
5M. Grundelius, D. Angeli. Adaptive control of systems with backlash acting on the input [ C ]. Proc. 35th IEEE Conf. Decision Contr. , 1996, 4. 4689-4694.