Load Disturbance Resistance Speed Controller Design for PMSM. - Yongpeng Zhang; Cajetan M. Akujuobi; Warsame Ali; Charlie L. Tolliver; Leang-San Shieh (IEEE Trans. Ind. Electron., 2006)

Linearization modeling for non-smooth dynamical systems with approximated scalar sign function. - Jian Zhang; Yongpeng Zhang; Warsame Ali; Leang-San Shieh (CDC/ECC, 2011)