A DISCRETE ADAPTIVE INDUCTION POSITION SERVO DRIVE

In this paper a discrete adaptive induction position servo is designed and implemented. In the proposed servo system. the dynamic model of t he indirect field-oriented induction motor is estimated from the measu rements using the stochastic approach. Based on this model, a PI speed controller and a P position controller are designed using pole-placem ent and root-locus techniques. In order to reduce the effects of machi ne and load parameter variations on the performance of the indirect fi eld-oriented induction motor servo drive. an adaptive controller is au gmented. In which, a reduced reference model. which defines the desire d following control performance, is chosen and the adaptive control si gnal is synthesized. The proposed adaptive controller has the advantag es of easy to design and implement. Simulation and experimental result s show that good following and regulating control performances are ach ieved. Moreover, the performances are rather insensitive to the parame ter variations.