Volume 4 Issue 3
Authors: A.V. Borisov; L.V. Konchina; A.V. Chigarev
Abstract: A model of a novel twelve-link exoskeleton, which allowed body torsion in space, was proposed. The equations of motion in regards to deformability of the exoskeleton links, i.e. biological properties of the endoskeleton, were composed based on theoretical mechanics. A matrix form of the differential equations of motion was used. Generalizations for the matrix elements were also obtained for the first time. The obtained results allowed for an approximation of exoskeletal motions in regards to the endoskeleton, and calculations of separate links as well as of the whole system were carried out, which had a practical value for approximating exoskeletal motions to human bodies.
Keywords: Matrix; Nonlinear Differential Equations; A Single-Support Phase; A Human Locomotorium; Exoskeleton; Endoskeleton
Authors: Katsuaki Shirai; Tsuyoshi Kawanami; Hiroyuki Ageishi; Shigeki Hirasawa
Abstract: New devices using non-contact temperature measurements for high-temperature subjects are needed for manufacturing processes. We analytically and experimentally studied the measurement error of a non-contact temperature measurement method using a thermocouple placed in a hole in a subject. Radiation heat transfer and thermal conduction for the thermocouple placed in the hole were calculated. We found that the measurement error of a non-contact temperature measurement method using a thermocouple placed in a hole of a 1000°C subject was much lower than the measuring error of simple method using a thermocouple placed near a subject. The measuring error was less than 1°C when the thermocouple in the hole was longer than 22 mm, or the diameter of the thermocouple was less than 0.15 mm. Steady temperature was measured by an experimental apparatus similar to the calculation model. Experimental results agreed with calculations.
Keywords: Non-contact Temperature Measurement; Accuracy; Manufacturing Process; Heat Transfer