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Related Experiment Video

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Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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Fuzzy adaptive multi-mode sliding mode control for precision linear stage based on floating stator.

Jiwen Fang¹, Wei Zhong¹, Chong Li¹

¹School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.

The Review of Scientific Instruments

|February 3, 2019

Summary

A novel fuzzy adaptive multi-mode sliding mode control (FAMMSMC) enhances precision motion stages. This advanced control strategy improves positioning and tracking performance for voice coil motor-driven systems.

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Area of Science:

Robotics and Control Systems
Mechanical Engineering
Mechatronics

Background:

Precision motion stages are crucial in various scientific and industrial applications.
Voice coil motors offer high-performance linear actuation but require sophisticated control.
Traditional control methods often struggle with precision, speed, and robustness.

Purpose of the Study:

To develop and evaluate a novel control strategy for a voice coil motor-actuated precision motion stage.
To improve the positioning and tracking performance of linear motion systems.
To mitigate control issues like chattering and enhance overall system robustness.

Main Methods:

Design of a multi-mode sliding mode control (MMSMC) with two modes: sliding-mode control (SMC) and integral sliding-mode control.
Implementation of soft switching control to eliminate chattering by replacing the signum function with a smooth function.
Integration of fuzzy logic and adaptive control into MMSMC to create a fuzzy adaptive multi-mode sliding mode control (FAMMSMC).

Main Results:

The proposed FAMMSMC demonstrated superior performance compared to MMSMC and proportional-integral-derivative (PID) control.
Experimental results confirmed excellent positioning and tracking capabilities of the FAMMSMC.
The fuzzy controller effectively tuned the sliding mode function slope, while the adaptive law adjusted the switching control gain.

Conclusions:

FAMMSMC provides a robust and high-performance control solution for voice coil motor-driven precision motion stages.
The combination of fuzzy logic and adaptive control effectively addresses limitations of conventional sliding mode control.
This advanced control strategy holds significant potential for applications demanding high precision and accuracy.