Design and Optimization of an Intelligent Rehabilitation Wheelchair with Sit-to-Stand Trajectory

In order to assist the rehabilitation of patients with impaired lower limb, we designed and optimized an intelligent rehabilitation wheelchair. First of all, we choose the six bar mechanism, which can fit a complex trajectory, as the core device of the wheelchair. Assuming the movement of the backrest of chair could fit the trajectory of normal people's back during standing, we calculate the parameters of the six bar mechanism and use the 3D modeling software SolidWorks to establish the geometric model of the six bar mechanism. Based on the finite element analysis software ANSYS, the static analysis and structural simplification of the six bar mechanism are performed, which yields an optimized and improved lightweight prototype. Finally, other necessary devices to work with the wheelchair are designed and assembled. In addition, pressure sensors are planted in the important parts to collect the patient's rehabilitation data, thus a closed-loop rehabilitation system could hereby be established.