Neural identification and control for linear induction motors

We propose a new adaptive control scheme, composed of a neural identifier and a nonlinear controller and applied it to a linear induction motor (LIM). In order to compare the performance of LIM, we use α - β and d - q models. A neural identifier of triangular form is proposed for both models as a nonlinear block controllable form (NBC). Then, a reduced order observer is designed in order to estimate no measured variables. Learning law for neural network weights ensure that the identification error converges to zero exponentially. Sliding mode control is developed to track velocity and flux magnitude. Simulations are presented to compare the behaviour of both models of LIM and the applicability of the proposed identification and control scheme.

[1]  I. Takahashi,et al.  Decoupling control of thrust and attractive force a LIM using a space vector control inverter , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[2]  Rong-Jong Wai,et al.  Hybrid control using recurrent fuzzy neural network for linear induction motor servo drive , 2001, IEEE Trans. Fuzzy Syst..

[3]  S. Yamamura Theory of Linear Induction Motors , 1972 .

[4]  R. Marino,et al.  Adaptive input-output linearizing control of induction motors , 1993, IEEE Trans. Autom. Control..

[5]  Jacek F. Gieras,et al.  Linear induction drives , 1993 .

[6]  Vadim I. Utkin,et al.  Sliding Modes in Control and Optimization , 1992, Communications and Control Engineering Series.

[7]  Tommy W. S. Chow,et al.  A recurrent neural-network-based real-time learning control strategy applying to nonlinear systems with unknown dynamics , 1998, IEEE Trans. Ind. Electron..

[8]  Rong-Jong Wai,et al.  Adaptive recurrent-neural-network control for linear induction motor , 2000, Proceedings of the 2000. IEEE International Conference on Control Applications. Conference Proceedings (Cat. No.00CH37162).

[9]  Weiping Li,et al.  Applied Nonlinear Control , 1991 .

[10]  Faa-Jeng Lin,et al.  Induction motor servo drive with adaptive rotor time-constant estimation , 1998 .

[11]  Vadim I. Utkin,et al.  Sliding mode control in electromechanical systems , 1999 .

[12]  Karl Johan Åström,et al.  Adaptive Control , 1989, Embedded Digital Control with Microcontrollers.

[13]  Manolis A. Christodoulou,et al.  Dynamical Neural Networks that Ensure Exponential Identification Error Convergence , 1997, Neural Networks.

[14]  Kwang Y. Lee,et al.  An optimal tracking neuro-controller for nonlinear dynamic systems , 1996, IEEE Trans. Neural Networks.

[15]  Ion Boldea,et al.  Linear electric actuators and generators , 1997, 1997 IEEE International Electric Machines and Drives Conference Record.