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In this paper, we propose a passive wire-type motion support system to guide a human hand through the use of servo brakes. This system is intrinsically safe because servo brakes cannot generate a driving force to control the system. On the other hand, this system may not generate sufficient force to guide the human hand along the desired path because of the use of servo brakes. To resolve this problem,...
This paper introduces contribution of the thumb sensation to precisions of human's pinching force control when the human cooperatively pinch an object with the exoskeleton, which augments human pinching force based on a surface electromyography. A human hand should contact with a grasping object directly, while the exoskeleton pushes the human hand for grasping support, because tactile feedback from...
In this paper, we develop a passive wire-type motion support system controlled by servo brakes to assist human motion in the fields of rehabilitation and sports training. We also propose a control method to guide the human hand by using the servo brakes which cannot generate a driving force. This passive system is intrinsically safe and wire-type motion support system has a wide operating range. But,...
In this paper, a basic study for breakthrough in tactile presentation technology is described to progress tactile displays using velvet hand illusion (VHI). In the VHI, a person rubs his/her hands together on either side of wires strung through a frame, producing the sensation of rubbing a very smooth and soft surface like velvet. Since in VHI human subjects feel the surface like velvet that does...
It is important for a wearable robot to be compact and sufficiently light for use as an assistive device. Since human fingers are arranged in a row in dense space, the concept of traditional wearable robots using a rigid frame and a pin joint result in size and complexity problems. A structure without a conventional pin joint, called a jointless structure, has the potential to be used as a wearable...
To assist human motion in the fields of rehabilitation and sports training, we propose a passive motion support system consisting of wires with servo brakes and a control method to guide the human hand. However, passive systems sometimes cannot generate enough force to guide the human hand along the desired path because the servo brakes cannot generate a driving force and the system does not have...
This paper presents a new design of an arm exoskeleton using shape memory alloy wires and springs embedded in fabric and taking the form of a sleeve. The device is intended to facilitate everyday life tasks by providing the user with an easily operated lift aiding device. The “SMA Aiding Sleeve” will bring extra lifting power to various classes of users (medical and non-medical). This paper presents...
In this paper, we introduce a passive haptic device which consists of wires with servo brakes and its control method for physical support of human being. Since servo brakes control a point constrained by wires, this passive system is intrinsically safe and has a wide operating range. We especially develop a motion support system controlled on plane and conduct a path following experiment for illustrating...
In this paper, the objective is to analyze a robot system with consideration the different levels of wire rope tension for human-robot applications. In the controller design, dual disturbance observers with respect to two operation modes, namely the common mode and the differential mode are designed and applied for controlling wire rope tension and interaction force of human. The variable wire rope...
Estimation of joint torque is one of the motion analyses for a humans. It has been applied to rehabilitation, virtual reality, sports training and so on. This paper presents the development of a torque estimation system for the human leg in passive motion. This system uses a parallel-wire driven mechanism using two wires and iterative learning control. From the viewpoint of motion range of the human...
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