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Improved iterative learning control method and control system for permanent magnet linear synchronous motor

A permanent magnet synchronous linear and iterative learning control technology, applied in control systems, AC motor control, estimation/correction of motor parameters, etc.

Inactive Publication Date: 2012-10-03
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing iterative learning algorithm, when the actual system faces a new environment and control tasks, the system must re-learn

Method used

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  • Improved iterative learning control method and control system for permanent magnet linear synchronous motor
  • Improved iterative learning control method and control system for permanent magnet linear synchronous motor
  • Improved iterative learning control method and control system for permanent magnet linear synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0093] Embodiment of Iterative Learning Control Method for Permanent Magnet Synchronous Linear Motor

[0094] The simplified transfer function model of the permanent magnet synchronous linear motor in this example is:

[0095] y ( s ) u * ( s ) = b s 2 + as

[0096] The model uses figure 1 express, u * ( t ) = U ( t ) - f * r ( y ) - ...

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Abstract

The invention discloses an improved iterative learning control method and an improved iterative learning control system for a permanent magnet linear synchronous motor (PMLSM). The control method comprises the following steps of: calculating the control voltage of a stator of the PMLSM by adopting a time axis and iteration axis superposed iterative control law algorithm; introducing an initial control variable u0 on the time axis of the iterative control law algorithm, and designing an adaptive factor alpha; and adding a feedforward control variable to the (k+1)-iterated control voltage of the PMLSM following an iterative learning law. The control system comprises an embedded controller, a power driving module connected with the stator of the PMLSM, and a rotor displacement sensor arranged on the PMLSM. The oscillation of an initial iteration track is avoided, and an iterative convergence speed is increased; and control accuracy is improved to be 0.55 percent.

Description

(1) Technical field [0001] The invention relates to the technical field of intelligent control of permanent magnet synchronous linear motors, in particular to an improved iteration of permanent magnet synchronous linear motors through iterative learning of historical data for periodic interference occurring in the reciprocating motion of permanent magnet synchronous linear motors Learn control methods and control systems. (2) Background technology [0002] The permanent magnet linear synchronous motor (Permanent Magnet Linear Synchronous Motor, PMLSM) adopts direct drive, which simplifies the equipment such as gears, balls and screws, so it has faster response speed, higher sensitivity, better follow-up performance, and can realize ultra-high-speed motion . And it also has more advantages than other motors in terms of positioning accuracy and efficiency. Due to the use of direct drive, uncertain factors such as system parameter perturbation, load disturbance and external n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/02H02P25/06H02P23/14H02P6/17H02P25/064
Inventor 党选举刘振丙姜辉朱骁杨青龙超
Owner GUILIN UNIV OF ELECTRONIC TECH
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