Title :
A robust digital position control of brushless DC motor with dead beat load torque observer
Author :
Ko, Jong Sun ; Lee, Jung Hoon ; Chung, Se Kyo ; Youn, Myung Joong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
10/1/1993 12:00:00 AM
Abstract :
A method for the robust position control of brushless DC (BLDC) motors is presented. The linear quadratic controller plus load torque observer is used to obtain an approximately linearized robust BLDC motor system for an AC servo, using the field-orientation method. The gains are obtained systematically from a discrete state space analysis. The robustness is obtained without affecting the overall system response. The load disturbance is detected by a zero-observer of the unknown and inaccessible input, and is feedforward compensated without requiring noisy current information. The overall system is controlled using a microprocessor, and the performance of each control algorithm is compared with both the simulation and the experimental results for two types of machines, a BLDC motor and a brushless direct drive (BLDD) motor
Keywords :
DC motors; digital control; position control; power engineering computing; state estimation; state-space methods; torque control; brushless DC motor; dead beat load torque observer; discrete state space analysis; feedforward compensated; field-orientation method; linear quadratic controller; microprocessor; robust digital position control; zero-observer; Brushless DC motors; Brushless motors; Control systems; DC motors; Linear approximation; Position control; Robust control; Servomechanisms; Servomotors; Torque control;
Journal_Title :
Industrial Electronics, IEEE Transactions on
