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.