Design and Simulation of the Adjustable Weight bearing system to adjust the torque change by the distal joint on 2DOF body limb

In daily life, arm motions are important for many activities. However, many people suffer from arm impairment because of such conditions as muscle disease and spinal cord injury and experience inconvenience in daily life. We present a new type of adjustable weight bearing system by considering the torque change by the 2-DOF system. In this system, we choose the tendon-driven mechanism for transmitting the weight bearing force from the weight bearing system to the upper arm. Also, we use soft materials such as fabric for the wearing part to minimize joint misalignment and avoid an unfamiliar appearance. In this paper, we suggest the design of the adjustable weight bearing system and simulate the joint torque on shoulder and elbow joint to show the effect of the system.