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In the perception-assist, user's dangerous motion is changed to safety motion when there is a possibility of accident such as the collision between user's body parts and obstacles. On the other hand, the joint motion of a human can be changed by using vibration stimulation on the tendon of muscle. By using this motion change method, there is a possibility that perception-assist by using vibration...
Both motor ability and sensory ability are important to generate human daily motion. However, owing to ageing and/or physical handicap, these abilities sometimes decline. In order to assist motor ability and sensory ability, lower-limb/upper-limb power-assist robots with the perception-assist function have been proposed. By using the perception-assist function, the user's motion is automatically modified...
In order to assist the daily life motion of physically weak persons such as elderly persons, many kinds of power-assist robot have been developed. In the case of physically weak persons, perception ability to perceive the surrounding environment is often deteriorated also. A method of perception-assist has been proposed to assist not only the user's motion but also interaction of the user with his/her...
Dislocation of an artificial hip joint is one of the most serious problems for Total Hip Arthroplasty (THA). In order to analyze the phenomenon of the artificial hip joint dislocation, a hip joint simulator has been developed. Although the hip joint motion and the hip joint contact force (the resultant muscle force around muscles of hip joint and the floor reaction force) during the daily life motion...
It may be difficult task for physically weak elderly, disabled and injured individuals to perform the day to day activities in their life. Therefore, many assistive devices have been developed in order to improve the quality of life of those people. Especially upper-limb power-assist exoskeletons have been developed since the upper limb motions are vital for the daily activities. Electromyography...
Many kinds of power-assist robots have been developed in order to assist self-rehabilitation and/or daily life motions of physically weak persons. Several kinds of control methods have been proposed to control the power-assist robots according to user's motion intention. In this paper, an electromyogram (EMG)-based impedance control method for an upper-limb power-assist exoskeleton robot is proposed...
Dislocation and wear of an artificial hip joint are still serious problems to be solved for THA. Specifically, the mechanism of dislocation of an artificial hip joint has not been clarified. The hip joint simulator has been developed to analyze the phenomenon of dislocation of an artificial hip joint. In the simulator, the muscle model is applied in addition to the floor reaction force in order to...
In order to improve the quality of life of persons who lost their limb due to an accident or a sickness, many myoelectric artificial arms have been proposed. To control the motion of the elbow joint of the myoelectric arm, the EMG signals of the biceps brachii and the triceps brachii muscles are frequently used as input signals. However, since both muscles are the biarticular muscles between the shoulder...
A tremor is somewhat rhythmic motion that may occur in various body parts. An essential tremor is one of the most common tremor disorders of the arm and it may occur during a voluntary motion. If the essential tremor occurs in the arm, the person may not be able to achieve the target task properly since the human performs various sensitive tasks with certain tools. Suppressing the vibration of the...
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