5Phillips, F. How step-motor performance varies with type of control[J]. Control Engineering, 2001,48 (7): 62.
6Chen D, Paden B. Adaptive Linearization of Hybrid Step Motors [J]. Stability Analysis, IEEE Trans. on Automatic Control, 1993,38 (6): 874-887.
7Eml V., Radn M, Marius T. Simulating Stepper Motors Chopper Drives [J]. Proc. of Symp. on IMCSD. Univ. of Illinois. 1996,25th:295-305.
8Fan, Xiao-ming, Zhang Li, Wang, Guo-dong, Liu, Xiang-hua,Han, An-rong. Control system of two phase hybrid step motor based on the torque star vector model[J]. Journal of Northeastern University, 2000,21 (1): 101-103.