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A novel control method for the walking assistance device using predefined walking trajectory used to walk for the elderly or the patients with weak leg muscle on stairs from plain more safely and naturally is proposed in this paper. Two control method, torque control and impedance control, used per their usage purpose are introduced, and the later one is focused in this paper. To make sure the use...
This paper presents a study of the center of pressure (COP) behavior during anticipatory postural adjustments phase (APA) of gait initiation in different conditions which are commonly required in daily activities. Twelve young subjects enrolled in this study and performed gait initiation in horizontal and upward and downward inclined surfaces. Significant differences were found only in the mediallateral...
The limited ability to dorsiflex the foot, known as drop foot, can be treated by functional electrical stimulation. Therein, undesired foot eversion/inversion is a common problem which is usually corrected by tedious manual repositioning of the electrodes. We address this issue by presenting a feedback-control solution featuring three major contributions: (1) an algorithm for inertial sensor-based...
This study aimed to investigate an intuitive teleoperation interface for distance mobility, such as telepresence robots. To avoid interference from the upper limbs, the proposed interface used lower limb movements estimated from the surface EMG as the control input. We proposed two types of operation methods: single foot style and bipedal-like methods, and evaluated their operationality and intelligibility...
Electrical stimulation (ES) is one of the solutions for drop foot correction. Conventional ES systems deliver predefined stimulation pattern to the affected muscles. However, time-variant muscle response may influence the gait performance as they are difficult to be taken into account in advance. Therefore, closed-loop ES control is important to obtain desired gait in presence of muscle response variation...
We introduce a method for lower-limb physical rehabilitation by means of a robot that applies preliminary defined forces to a patient's foot while moving it on a preliminary defined trajectory. We developed a special musculoskeletal model that takes into consideration the generated muscle forces of 27 musculotendon actuators and joint stiffness of the leg and allows the calculation of the motion trajectory...
This paper describes the development of a gait rehabilitation system with a locomotion interface (LI) for stair climbing or descending. The LI consists of two 2 DOF manipulators equipped with footpads. These can move the user's feet while his or her body remains stationary. The footpads follow the prerecorded motion of the feet of a healthy individual. For gait training, the user progresses iteratively...
This paper describes the development of a gait rehabilitation system with a locomotion interface (LI) for stair climbing or descending. The LI consists of two 2 DOF manipulators equipped with footpads. These can move the user's feet while his or her body remains stationary. The footpads follow the prerecorded motion of the feet of a healthy individual. For gait training, the user progresses iteratively...
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