Frequency and Acceleration Measurement for the Above Knee Prosthetic Limb and its Comparison with the Healthy Limb

Abstract

omfort, stability, weightiness, stiffness, flexibility, toughness and cost are the most important goals during which all researchers try to reach. In this work, the first challenge is to design and manufacture vibration measurement system which consists of a shaker ,cam, motors, speed varitor and accelerometer. This system is used to measure displacement ,velocity ,acceleration and frequency in amputation joint in the whole body in the selected eleven points with four speed motor (500,600,700 and 800 rpm).The amputee case study is of age, weight, length and the residual amputee limb of 28 years, 75kg, 175cm and 38 cm respectively. The amputee lost his lower limb due to a car accident since 2002.Results show that the value of acceleration and frequency increases when motor speed increases. While the acceleration and frequency decreases when accelerometer position from the shaking table increases . Moreover , the acceleration values for prosthetic limb will be more than of the healthy limb with percent of about (10.3,8.1,8.4,11.6,2.7,6.8)% for foot, ankle, leg, knee, thigh and hip respectively. While the acceleration values of artificial limb with liner are less than those of artificial limb without liner with (7.8,0.86,23.05,1.01,2.6 and 5.04)% for foot, ankle, leg, knee, thigh and hip, respectively .