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In recent years, haptic communication with teleoperation systems has been actively researched. One of the effective methods for haptic communication is bilateral motion control based on acceleration control. If the acceleration-based bilateral control is applied to a parallel multi-degrees-of-freedom (MDOF) system, complicated haptic human motion can be realized in the remote site. However it is difficult...
The exploratory visualization of 3D data sets or multiple axis motion control of a monitoring camera mounted on a six-axis robot often require the user to control the viewing orientation and position of a camera view within a 3D space. This paper describes the design of an inertial motion sensing system, which uses only accelerometers to provide interactive 3D control of both orientation and position...
Many daily tasks require that a person use both hands simultaneously, such as moving a large book or opening the lid on a jar. Such bimanual tasks are difficult for people who have a stroke, but the tight neural coupling across the body has been hypothesized to allow individuals to self-rehabilitate by physically coupling their hands. To examine potential methods for robot-assisted bimanual rehabilitation,...
A power assist system reduces the weight of an object lifted with it. But, the human operator cannot differentiate between the perceived weight and the actual weight and eventually applies excessive load force. This faulty force programming (excessive load force) results in faulty motions of the power assist system and jeopardizes its maneuverability, ease of use, naturalness, human-friendliness,...
This paper describes a novel approach to interactive power assisting control cooperating with visual information for robotic wheelchair. In the proposed approach, both encoder-based and vision-based reaction force observer are designed for obtaining the virtual force due to the environmental change in the field of view. The vision-based observer using the optical flow field of visual scene can estimate...
This study investigates a dual task: 1) visuo-manual tracking of a target moving on an eight-shaped trajectory and 2) compensation of a robot-generated, motion-dependent force field. The target speed is dependent on the tracking error, in such a way that the task difficulty increases as tracking performance improves. The results show that although non trivial this dual-task protocol can be learned...
While robot-assisted rehabilitation is often found to help recovery, their use often remain limited to clinical trials. Amongst the reasons that may explain their under-use is the difficulty to bridge the gap between the score on a robot-assisted exercise and the control processes that mediate the measured performance. This paper illustrates the potential benefits of a multi-task approach for evaluating...
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