面向智能盲杖的触觉反馈控制系统设计

Haptic Feedback Control System Design for Smart Blind Cane

  • 摘要: 近年来辅助视障者的装置在国内外受到了广泛关注。针对目前盲杖设计缺乏对视障者的方向引导问题,提出了一种可以提供触觉反馈的智能盲杖控制系统。在盲杖手持部分引入无刷电机作为触觉反馈单元的主要组成部分,为视障者提供方向指示。该触觉反馈单元基于永磁同步电机(PMSM)数学模型,电机驱动采用矢量电机控制算法磁场定向控制(FOC)以及自抗扰控制(ADRC),用于优化负载转矩波动期间的速度控制策略。在MATLAB/Simulink搭建模型进行仿真分析,并对比了使用PI控制器下的系统,证明了该系统的有效性及稳定性。

     

    Abstract: Devices designed to assist the visually impaired have garnered significant attention both domestically and internationally in recent years. To address the current blind canes' inadequacy in providing directional guidance, we propose an intelligent blind cane control system capable of delivering haptic feedback. A brushless motor is introduced into the handheld part of the cane as the main component of the haptic feedback unit to provide direction guidance for the visually impaired. The haptic feedback unit is designed using a mathematical model of a permanent magnet synchronous motor (PMSM). The motor drive incorporates both a vector motor control algorithm, specifically field-oriented control (FOC), and an auto-disturbance rejection control (ADRC) to enhance the speed control strategy during variations in load torque. The model is developed in MATLAB/Simulink for simulation and analysis. The model was built and simulated in MATLAB/Simulink, and the system was compared with one using a PI controller, demonstrating the system's effectiveness and stability.

     

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