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One of the important tasks for a personal vehicle is accompanying a human partner. In our previous works, we discussed how the vehicle should lead its partner, or follow its partner according to their relative position and environmental conditions for a cooperative movement when they entered into narrow space. This study, next, aims to develop a method of a path planning in the case that the personal...
This paper proposes a novel driving-assistance system for manual wheelchairs with consideration of both uphill and downhill conditions. On an inclined road, there is a high risk of a wheelchair moving in a direction that the user does not intend. In our previous works, the user has driven our assistive wheelchair in the usual manner. Our proposed system estimates its user's intentions and passively...
Accompanying a person is one of the core capacities of a personal mobility vehicle and demands a smooth movement function with collision avoidance. In previous studies on a personal mobility vehicle, a vehicle moves in synchrony with a walking partner. However, in some cases, especially where potentially dangerous obstacles appear in the environment, a vehicle should lead its partner. In this case,...
This paper proposes a novel driving assistance system for a manual wheelchair. On an inclined road, there is a high risk of a wheelchair moving in a direction that the user does not intend. Using only servo brakes on each wheel, our proposed system negates the wheel traction that is generated by the road's inclination. Our system measures the road's inclination and estimates the wheel traction generated...
This paper proposes an automatic sitting posture coordination system for avoiding the risk of the pressure sore on a wheelchair. For avoiding this risk, it is important to maintain the suitable posture which reduces the pressure concentration and share stress between the buttock and a sitting surface on the wheelchair, and to depressurize them as the healthy person does during sitting on the wheelchair...
This paper proposes a novel driving assistance system for a manual wheelchair. On an inclination road, there is a high risk of moving the direction, which a manual wheelchair user does not intend, because of a gravitational force. Our proposed system cancels the wheel traction, which is generated according to the inclination of the road, using only servo brakes on each wheel. Our system measures the...
This paper propose a driving assistance scheme for a powered wheelchair with a force feedback function of its joystick. Generally, a powered wheelchair moves in a human coexistence environment such as a pedestrian way and it is important to move on these environments without a feeling of oppression to other people around it. Therefore, we propose a concept of a dynamic personal space which is a region...
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