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A teleoperated minimally invasive surgical system was implemented for laparoscopic surgery. The surgical manipulator has upper and lower arms akin to a human arm and has an elbow joint as an additional DoF joint. A remote controller was developed to measure the human arm position and deliver the angle data of the human arm to the surgical manipulator by TCP/IP communication. The human elbow angle...
In this study, the sliding mode approach is applied to the tracking control problem of a planar arm manipulator system driven by a new type of actuator, which comprises a pneumatic muscle (PM) and a torsion spring. Unlike the traditional agonist/antagonist pneumatic muscle actuator, the PM is arranged in place of bicep and the torsion spring provides opposing torque in the presented actuator. The...
When analyzed in the tangential speed domain, human movements exhibit a multi-peaked speed profile which is commonly interpreted as evidence for submovements. At slow speeds, the number of the peaks increases and the peaks also become more distinct, corresponding to non-smoothness or intermittency in the movement. In this study, we evaluate two potential sources proposed in the literature for the...
This study aimed at investigating and quantifying the time course of abnormal synergies in the affected upper limbs of chronic stroke patients treated with a neuro-rehabilitation robot. Eight age-matched normal and seven chronic stroke patients were recruited to perform rectilinear tracking movements in four directions for four months. Kinematic, kinetic and electromyographic (EMG) data were used...
In this paper the trajectory tracking control of the arm rehabilitation robot for stroke patients is investigated by an interactive robust control approach. The functions of patients' voluntary joint torques are designed depending on the motion ability of their arms, and the dynamic model of the human-robot system is presented. Based on the dynamic model, an interactive controller is designed to provide...
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