面向智能盲杖的触觉反馈控制系统设计

Design of a Tactile Feedback Control System for Intelligent White Canes

  • 摘要: 近年来,辅助视障者出行的装置在国内外受到了广泛关注。该文针对现有盲杖在方向引导方面的不足,设计了一种具备触觉反馈功能的智能盲杖控制系统。该系统在盲杖手持部分引入无刷电机作为触觉反馈单元的核心,为视障者提供方向指示。触觉反馈单元建立在永磁同步电机(PMSM)数学模型基础之上,采用磁场定向控制(FOC)与自抗扰控制(ADRC)相结合的矢量控制算法,实现对负载转矩波动下电机转速的精准控制。通过在 MATLAB/Simulink 平台搭建仿真模型,并与传统 PI 控制器进行对比分析,验证了所设计系统的有效性和稳定性。

     

    Abstract: In recent years, assistive devices for visually impaired individuals have received widespread attention both domestically and internationally. This paper addresses the shortcomings of existing white canes in directional guidance by designing an intelligent white cane control system equipped with tactile feedback. A brushless motor is introduced into the handle of the cane as the core of the tactile feedback unit to provide directional cues for visually impaired users. The tactile feedback unit is based on the mathematical model of a Permanent Magnet Synchronous Motor (PMSM), and employs a vector control algorithm combining Field-Oriented Control (FOC) and Active Disturbance Rejection Control (ADRC) to achieve precise speed control of the motor under load torque fluctuations. A simulation model was built on the MATLAB/Simulink platform and compared with a traditional PI controller, validating the effectiveness and stability of the proposed system.

     

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