2012 **Abstract:** This paper proposes a fuzzy speed tracking controller and a fuzzy rotor angular acceleration observer for a surface-mounted permanent magnet synchronous motor (SPMSM) based on the Takagi-Sugeno (T-S) fuzzy model. The proposed observer-based controller is robust to load torque variations since it utilizes rotor angular acceleration information instead of the load torque value. Linear matrix inequality (LMI) sufficient conditions are given to compute the gain matrices of the speed tracking controller and the obs…

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“…Consequently, the system parameter variations can strongly affect the control performance of these conventional schemes. Moreover, most of the previous methods require an assumption that the time derivative of the load torque is equal to zero [4]- [6], [8]- [11], and [13]. Therefore, these two problems limit the accuracy of the speed regulator.…”

confidence: 99%

“…Consequently, the system parameter variations can strongly affect the control performance of these conventional schemes. Moreover, most of the previous methods require an assumption that the time derivative of the load torque is equal to zero [4]- [6], [8]- [11], and [13]. Therefore, these two problems limit the accuracy of the speed regulator.…”

confidence: 99%

“…In most of the previous speed control methods, z 1 (t), z 2 (t), and z 3 (t), and their time derivatives are commonly ignored and the nominal values of the system parameters (k 1 , k 2 ,..., k 6 ) are used to construct the feedforward control term regardless of these system uncertainties [4], [5], [8], [9], and [13]. However, when the system parameters change during the operation of the drive system, the system parameters used in these controllers are mismatched with their actual values.…”

confidence: 99%