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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

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Sensorless H_∞ speed-tracking synthesis for surface-mount permanent magnet synchronous motor.

Ramón Ramírez-Villalobos¹, Luis T Aguilar², Luis N Coria¹

¹Tecnológico Nacional de México - Instituto Tecnológico de Tijuana, Calz. del Tecnológico S/N, Tomas Aquino, 22414 Tijuana, BC, México.

ISA Transactions

|January 18, 2017

Summary

This study introduces a sensorless speed tracking control for permanent magnet synchronous motors using a nonlinear H_∞-controller. The method effectively tracks speed references while mitigating disturbances and noise, validated by simulations.

Keywords:

Nonlinear H∞ control Permanent magnet synchronous motor Sensorless speed-tracking synthesis

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Area of Science:

Electrical Engineering
Control Systems Engineering
Robotics

Background:

Surface-mount permanent magnet synchronous motors (SPMSMs) are widely used in industrial applications.
Accurate speed control is crucial for SPMSM performance.
Sensorless control eliminates the need for mechanical speed sensors, reducing cost and complexity.

Purpose of the Study:

To propose a novel sensorless speed tracking control strategy for SPMSMs.
To design a nonlinear H_∞-controller for robust speed estimation and tracking.
To ensure system stability and disturbance attenuation using stator current feedback.

Main Methods:

A nonlinear H_∞-controller was designed based on stator current measurements.
Output feedback was utilized for rotor position estimation.
The controller design ensures uniform asymptotic stability and local attenuation of disturbances and noise.
The existence of solutions to perturbed differential Riccati equations guarantees system stabilizability and detectability.

Main Results:

The proposed controller achieves sensorless speed tracking for SPMSMs.
The system demonstrates uniform asymptotic stability around the desired speed reference.
External disturbances, noise, and input backlash effects are locally attenuated.
Rotor position is accurately calculated from the controller and speed reference.

Conclusions:

The developed nonlinear H_∞-controller provides an effective sensorless speed tracking solution for SPMSMs.
The controller enhances robustness against uncertainties and disturbances.
Numerical simulations validate the efficacy and performance of the proposed control system.