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Each year hundreds and thousands of human lost their lower limbs for accident, disease, war and so on. Wearing transfemoral prostheses is the only way return to society. The inability to deliver joint power significantly impairs the ability of these prostheses to restore many locomotive functions. A novel and smart Active Transfemoral Prosthesis is designed for transfemoral amputees. Using Vicon MX...
With the development of biomedicine and microcontroller technology, above knee prosthesis has been improved rapidly. However most current researches just focus on the single knee joint, and ignore the coupling between knee joint and ankle joint, which do not meet the needs of patients who need to perform multi-joint coordinated movement. This paper presents a new control method using bipedal robotics...
This paper describes an active above knee prosthesis designed to compensate the movements of transfemoral amputees. Analyze the gait of transfemoral amputee wearing intelligent prosthesis. Though the prosthesis can change damping at different speed and gait, the gait of healthy side and affected-side is out of step. The disorder gait increase stress of residual limb. Using Vicon MX system captures...
Changes in walking speed may eventually result in modifications of the patterning of muscle activity. The surface electromyography (EMG) signals provide easy and noninvasive access to physiological processes that cause the contraction of muscles. The influence of walking speed on muscle and EMG activity of amputee's thigh was analyzed, the speed pattern recognition approach based on the combination...
A controller for a intelligent prosthetic knee which consists of four bar linkage mechanism with fixed pneumatic cylinder is presented. To detect human motion parameters, local sensor of goniometer and hall sensor are adopted. To obtain a displacement of the conical valve correspond to current speed, a knowledge base is established by ILC(Iterative Learning Control) algorithm. To validate the effects...
The surface electromyography signal extracted from the stump was applied to recognize the movement, and be translated into on-off signal to fulfill the conversion from standing to walking. According to the different situation of stump, the signals extracted from different muscles were applied to control the prosthesis. Factor analysis was applied to find the relationship between different muscle groups,...
In order for individuals suffering from transfemoral amputation to walk in a variety of circumstances, the above-knee prosthesis based on posture recognition was presented. The body posture of lower limb was classified into four classes, "stair", "sitting", "standing", and "walking". For measure the amputee's movement intent, surface EMG signals which can reflect...
In order to improve the gait of disable people, a control concept of above-knee prosthesis was presented. The surface electromyography signal extracted from leg muscles was applied to recognize the phase of stride, and translated into on-off signal of self-lock control. A hybrid neural network-genetic algorithm was applied to describe the relation between surface electromyography signals and every...
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