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One-Dimensional Control System for a Linear Motor of a Two-Dimensional Nanopositioning Stage Using Commercial Control

Lucía Candela Díaz Pérez1, Marta Torralba Gracia2, José Antonio Albajez García3

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Researchers developed a sensorless, closed-loop control strategy for Halbach linear motors in a nanopositioning platform stage (NanoPla). This system achieves precise 1 μm incremental motion over a 50 mm range, crucial for advanced engineering applications.

Keywords:
Halbach linear motorcommercial control hardwarepositioning platform

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Area of Science:

  • Precision Engineering
  • Control Systems
  • Mechatronics

Background:

  • A two-dimensional (2D) nanopositioning platform stage (NanoPla) requires precise motion control for its actuators.
  • Halbach linear motors offer advantages for precision engineering but necessitate tailored control strategies.

Purpose of the Study:

  • To develop and validate a one-dimensional (1D) control strategy for Halbach linear motors.
  • To adapt a commercial Digital Motor Control (DMC) Kit for sensorless and closed-loop control of linear motors.

Main Methods:

  • Dynamic characterization of the Halbach linear motor.
  • Development of a sensorless controller leveraging motor dynamics.
  • Implementation of a closed-loop control strategy on commercial DMC hardware.

Main Results:

  • Experimental validation of the developed 1D control strategy.
  • Successful operation of the Halbach linear motor within the NanoPla's requirements.
  • Achieved a working range of 50 mm with a minimum incremental motion of 1 μm.

Conclusions:

  • The developed control system effectively meets the NanoPla's nanopositioning requirements.
  • Utilizing commercial control hardware enhances the applicability of advanced motor control strategies.
  • Sensorless and closed-loop control of Halbach linear motors is feasible for precision engineering platforms.