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Robot-assisted minimally invasive surgery becomes more and more popular, but the lack of force sensing for surgical robots restricts the development of this technology. The traditional way to obtain tool-tissue interaction force is to integrate sensors at the end of surgical instruments, which is not well adopted in practical due to high-cost and sterilization problems. It is necessary to explore...
In order to help spinal cord injury (SCI) patients to walk again, a medical robot exoskeleton have been developed to assist these patients to walk independently in SIAT, Shenzhen. The research of this article is exoskeleton robot single joint load adaptive servo control. Considering the volunteers, wearing an exoskeleton robot, joints have significant changes in load torque and the moment of inertia,...
In pedicle screw insertion surgeries, the most dangerous part is the screw path drilling process. In current surgeries, surgeons guarantee not to drill through the vertebra by their haptic and auditory sense and experience. In this paper, an intraoperative real-time control method for a Robotic Spinal Surgical System (RSSS) with state sensing is proposed. A drilling state recognition with Audio-Torque...
Based on the analysis of the first prototype of an assisting robotic arm (ARA) for minimally invasive thoracic surgery, an improved design is presented. A self-gravity compensation mechanism is developed to resist joint torques caused by the weight of the robot and to reduce the force exerted on the end-effector by the surgeon. With a motor built into the arm, the design of the ball-socket-joint is...
To improve the stepping motor torque-frequency characteristic, a kind of double voltage driving circuit with feedback control for stepping motor was designed and discussed. The paper describes the construction, principle and some parameters' calculation. The loading capacity of 3 kinds driving circuits has been compared with each other by experiments. Double voltage driving circuit with feedback control...
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