Ju-Hwan Bae

Biomechanical assessment of electric lifting chair for persons with disability

Electric lifting chair is a typical assistive product to aid for standing up and sitting down for persons with disability, and it is particularly useful for the elderly persons whose muscular system is weakened by degenerative joint disease. This paper describes a biomechanical assessment of electric lifting chair with hip-up function. In experiments we measured 3D motion data and electromyogram (EMG) on the femoral muscle when subject performs the standing motion on the predetermined seat height. The experimental results show that 15 degree of the hip-up angle is adequate for the hip-up function, and that the higher seat position is more effective to assist for standing up motion.

Design of electric assist-standing chair for persons with disability design of electric chair to assist person with disability in stand up and sitting down

In this paper, we propose the assist chair for standing and sitting that composes the lifting mechanism for low seat. And We developed the entrapment sensing mechanism to consider the safety of lifting mechanism. And We designed the arm-rest to be controllable the 90[deg]. Lifting function and entrapment sensing mechanism are controlled assistive-control system. In experimental result show that the proposed lifting chair can sense the obstruction and adjustable the height of seat.

Design of seat mechanism for multi-posture-controllable wheelchair

This paper proposes a design of seat mechanism for a wheelchair to be controllable multi-postures such as standing, reclining, tilting and elevation. The seat is designed based on a link mechanism including linear actuator, and its kinematics analysis is also presented. To control the multi-postures, we design a PID-based position and speed controller, and a motion planner to generate an available next posture from the present status. Simulation results show that the designed seat mechanism and its planner are applicable to develop the multi-postures-controllable wheelchair.

WEARABLE EXERCISE ROBOT WITH POWER ASSIST FUNCTION FOR WRIST REHABILITATION

In this paper a wearable exercise robot with power assist function for wrist rehabilitation is proposed. A force model for the wrist mechanism is presented, and its control system for active exercise and power assist function is designed based on the force model. In experiments the performances of active exercise and power assist function are verified. From the experimental results we show a possibility of the wearable exoskeleton robot in wrist rehabilitation and wrist motion.