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In this paper, an adaptive steering-control system for a steer-by-wire system, which consists of a vehicle directional-control unit and a driver-interaction unit, is developed. The adaptive online estimation method is used to identify the dynamic parameters of the vehicle directional-control and driver-interaction units. A nonlinear 4-degree-of-freedom (DOF) vehicle model, including the longitudinal,...
Recent research in orthopedic surgeries indicates that computer-assisted robotic systems can improve the precision and accuracy of the surgery which in turn leads to better long-term outcomes. Kinematic and dynamic analysis of an orthopedic robot called OrthoRoby, which will be used in bone cutting operations, are derived. Computed-torque and disturbance based observer low-level control methods have...
This paper presents the evaluation of a robot-assisted rehabilitation system with assist-as-needed and visual error augmentation training methods. In this robot-assisted rehabilitation system, an assistive controller provides robotic assistance to the participant as and when needed. In addition, the position errors that are visually fed back to the participant are amplified to heighten the participant's...
Vehicle directional control and driver interaction assemblies have been built to study and implement impedance control strategies on a steer-by-wire system. Adaptive online estimation is used to identify the dynamic parameters of vehicle directional control and driver interaction assemblies. A nonlinear 4 DOF vehicle model, including longitudinal, lateral, yaw and quasi-static roll motions is derived...
A finger exoskeleton has been developed to aid treatment of tendon injuries. The exoskeleton is designed to assist flexion/extension motions of a finger within its full range, in a natural and coordinated manner, while keeping the tendon tension within acceptable limits to avoid gap formation or rupture of the suture. In addition to offering robot assisted operation modes for tendon therapies, the...
This paper presents an approach to enhance an assistive controller, which has been designed for robotic rehabilitation of the upper extremity after stroke, with an error augmentation training method. The assistive controller provides robotic assistance to the participant as and when needed, while position errors that are visually fed back to the participant are amplified to heighten the participant's...
This paper presents an intelligent control architecture for robot-assisted rehabilitation after stroke that has the potential to minimize the workload of the therapist and incorporate patient feedback into autonomous modification of the task presentation during therapy. In particular, the presented intelligent controller will be able to administer a therapy task, monitor safety issues, provide assessment...
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