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.