Design of fuzzy-based magnetic suspension vibrator for electric wheelchair

A fuzzy-based magnetic suspension vibrator (FMSV) is designed and embedded into electrical wheelchair to promote its shock absorbing ability. Magnetic levitation system (MLS), using the electromagnetic force to float, rotate or move a suspended object, is a non-contact operation mode. This mode can effectively reduce the mechanical vibrations, friction and wearing loss caused by contact operation. Furthermore, it can also prolong the equipment's life, reduce maintenance frequency and noise. However, the MLSs possess the characteristics of nonlinear and dynamic properties, so a robust adaptive fuzzy controller (AFC) for magnetic suspension vibrator is proposed in this study. With the help of magnetic suspension vibrator, the electric power wheelchair can steer in a bumpy road and provide more comfortable riding environment for disabled people or patients.