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We have developed a new rehabilitation support system, UR-System 2, for restoring the motor function of a plegic upper limb after a stroke. Its design is based on knowledge gained during clinical testing of the UR-System. The UR-System 2 was equipped with the facilitating function of elbow extension based on the proprioceptive neuromuscular facilitation technique and the measurement function for evaluating...
The stabilization of most artificial systems has been achieved by sensor based state feedback control with high signal transmission speed and high computational power, and stiff structures. In contrast, many biological systems can achieve similar or superior stable behavior with low signal transmission speed and low computational power via nervous system, and flexible structures. In order to explain...
Stroke patients have reduced kinematic characteristics in gait speed, cadence, step kinematics, and range of motion (ROM). Especially, a drop foot is a common symptom during gait after stroke due to the weakness of ankle dorsiflexor. A few robotic ankle systems have been developed to measure and train pathological ankle movements. However, the previously developed systems use orthogonal ankle axis...
This paper describes the mechanism of a one-legged jumping robot that can mimic the muscular and skeletal system of a human leg. The jumping robot has a waist, a thigh, a shin, a foot, and a toe. The McKibben-type pneumatic muscle actuators that are able to generate the maximum output force of 1200 [N] are employed. Two kinds of pneumatic artificial muscles, mono-articular and bi-articular muscles,...
Interaction between wearable robot and the user may cause skin injury, especially the pressure ulcers due to sustained pressure at the connection site. In this study, relationship between pressure ulcer breakout time and applied pressure which is the major cause of pressure ulcer is modeled using human experimental data. The model is proposed to be used to limit the wearable robot use time depending...
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