Author
Katsuya Nagase
Bio: Katsuya Nagase is an academic researcher. The author has contributed to research in topics: Wheelchair. The author has an hindex of 3, co-authored 4 publications receiving 21 citations.
Topics: Wheelchair
Papers
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01 Jan 2014
8 citations
TL;DR: Experimental results related to these motions confirm the design’s effectiveness and mainly discuss the chair and step motions.
Abstract: A standing style transfer system, ABLE, is designed to assist a person with disabled lower limbs to travel in a standing position, to sit down in and stand up from a chair, and to go up and down a step. ABLE comprises three modules: a pair of telescopic crutches, a powered lower extremity orthosis, and a pair of mobile platforms. In this system, the telescopic crutches are useful not only to maintain the body stability in a standing position, but to supply power when standing up from a chair, going up a step, and so forth. The powered lower extremity orthosis has an actuator on each hip and knee joint. This module actively fixes, bends, and stretches each joint. The mobile platforms use crawlers to enable the person to travel even on uneven ground. These platforms also enable the user to turn on a rotation board mechanism. In this paper, we mainly discuss the chair and step motions. Experimental results related to these motions confirm the design’s effectiveness.
7 citations
TL;DR: This article primarily discusses a strategy that enables wheelchair users to climb stairs comprising multiple steps, and uses a pair of portable slopes to achieve this task.
Abstract: We have developed a pair of step-climbing units that can be installed on a standard manual wheelchair. Many wheelchair users hope to lead an independent life without assistance. The target users of...
6 citations
21 Jul 2015
TL;DR: A pair of step-climbing units that can be installed in a standard manual wheelchair are developed to enable manual wheelchair users to establish an independent life that they can lead without assistance.
Abstract: We have developed a pair of step-climbing units that can be installed in a standard manual wheelchair. We aim to enable manual wheelchair users to establish an independent life that they can lead without assistance. This mechanism is simpler because it uses the capabilities of the wheelchair user. Each unit comprises two actuators and has two degrees of freedom: telescopic motion and rotational motion. We mainly discuss a step-climbing motion using this system. Experimental results obtained when ascending the step of 15 cm height confirm the design's effectiveness.
2 citations
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TL;DR: A new synchronization-based trajectory generation method is proposed for a robotic suit that is designed to assist walking by supporting the hip joints with mutual inhibition between neural oscillators.
16 citations
TL;DR: The newly developed cooperative step-climbing system makes it possible to eliminate the complicated operations that were required by previous methods and can also prevent collisions between the wheelchair’s front wheels and the step, thus drastically improving the convenience of the operation.
13 citations
TL;DR: The findings suggest an overall positive influence of PA on various ICF domains/subdomains, but initial findings should be interpreted with caution.
Abstract: Manual wheelchair (MWC) users face a variety of obstacles limiting their participation. Different MWC models and new add-on components intended to improve propulsion may impact users’ function and ...
12 citations
09 May 2011
TL;DR: A new synchronization-based control is proposed for a robotic suit which is designed for walking assistance with mutual inhibition between neural oscillators to maintain a human-gait-like anti-phase relationship.
Abstract: A new synchronization-based control is proposed for a robotic suit which is designed for walking assistance. Neural oscillators are connected to each joint of the robotic suit to synchronize suit's movement with human user's movement (outer-synchronization). At the same time, mutual inhibition is incorporated between neural oscillators at each left and right joint of the suit to help to maintain a human-gait-like anti-phase relationship (inner-inhibition). We have developed a 2-DOF robotic suit, which consists of two actuators fixed to the places where the human hip joints are. Each actuator has a built-in torque sensor, which helps to measure the mutual joint torque generated by once there is any difference between the movement of a user and that of the suit. The mutual joint torque is used as input to neural oscillators, which control each actuator of the robotic suit through outer-synchronization with the mutual joint torque and inner-inhibition. The inhibitory weight, used to adjust the inhibitory strength between neural oscillators, is designed properly using series of simulations. We have conducted walking experiments to show the validity of our proposal for walking assistance of the robotic suit with mutual inhibition between neural oscillators.
10 citations
TL;DR: A standing style transfer system, ABLE, is designed to assist a person with disabled lower limbs to travel in a standing position, to stand up from and sit down in a chair, and to go up and down steps as mentioned in this paper.
Abstract: A standing style transfer system, ABLE, is designed to assist a person with disabled lower limbs to travel in a standing position, to stand up from and sit down in a chair, and to go up and down steps. The ABLE system comprises three modules: a pair of telescopic Lofstrand crutches, a powered lower extremity orthosis, and a pair of mobile platforms. In this paper, the telescopic Lofstrand crutch is mainly discussed. This crutch has no actuator, and its length is switched between two levels; it assists the person when standing up and sitting down in the short length state, while it maintains the body stability in a standing position when traveling in the long length state. The experimental results related to the traveling in the standing position and standing up motion confirm the design's effectiveness.
9 citations