Speed Motion-Sensorless with Adaptive Control Approach of Linear Induction Motor Unknown Resistance and Payload

摘要

In this paper, we will propose a nonlinear adaptive controller for a linear induction motor to achieve speed tracking. A nonlinear transformation is proposed to facilitate controller design. In this controller, only the primary currents are assumed to be measured. The secondary flux and speed observers are designed to relax the need offlux and speed measurement. Besides, the very unique end effect of the linear induction motor is also considered and is well taken care of in our controller design. Stability analysis based on Lyapunov theory is also performed to guarantee that the controller design here is stable. Also, the computer simulations and experiments are done to demonstrate the performance of Nomenclature V_(qs)(V_(ds)) q-(d-) axis input stator voltage i_(q)(i_(d)) q-(d-) axis input stator current R_(s)(R_(r)) Primary (secondary) resistance L_(s)(L_(r)) Primary (secondary) inductance (lambda)_(qr) ((lambda)_(dr)) q-(d-) axis rotor flux v_(r) Linear speed of the primary p_(r) Position of the primary M_(m) Primary mass B Viscous friction coefficient F_(e) Electromagnetic force P Mechanical load force L_(m) Mutual inductance K_(f) Force constant(velence3PL_(m)pi/2(tau)L_(r)) a_(2) velence (beta)R_(r)/L_(r), a_(3) velence L_(m)R_(r)/L_(r), a_(4) velence R_(r)/L_(r) D(velence)L_(s)L_(r)-L_(m)~(2), p(velence)P pi/tau, beta(velence)L_(m)/D, c(velence)L_(r)/D, a_(1)velence(R_(s)L_(r))/D+(beta)L_(m)R_(r)/L_(r).