| Summary: | 碩士 === 國立虎尾科技大學 === 創意工程與精密科技研究所 === 100 === This thesis proposes the parameters estimation and position control of induction motors by using the composite adaptation scheme. Firstly, in the rotor reference frame, the input-output linearization theory was employed to decouple the mechanical rotor position and the rotor flux amplitude at the transient state. An open-loop current model rotor flux observer estimates the flux, and then the adaptation laws estimate the rotor resistance, moment of inertia, viscous friction coefficient, and load torque. The passive properties of the flux observer, rotor resistance estimator, and the adaptive position controller were analyzed based on the passivity theorem. According to the properties, the overall position control system is proven to be globally stable without using Lyapunov-type arguments. Experimental results are finally provided to show that the proposed method is robust to variations of the motor mechanical parameters, rotor resistance, and load torque disturbances. Moreover, good position tracking response and parameters estimating characteristic can be obtained.
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