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Hun-ok Lim,Yoshiyuki Ohta,Shoji Machida 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper presents a mechanism and a control method of a personal motor vehicle -1 refined (PMV-1R) that can be used as a passenger and luggage conveyance. The PMV-1R consists of two wheels, an EC servo-motor, a differential gear and a base. Its total weight is 13 [kg], and the height of its base is 0.2 [m]. Its maximum payload is 100[kg]. A gyro sensor is installed to detect the inclination angle of the base in the pitch direction. A simple motion control is employed for the PMV-1R, which is based on the inclination angle. Several passenger and luggage conveyance experiments are conducted on a flat and rough terrain, and the effectiveness of its mechanism and control method is confirmed.
Sintering and Mechanical Properties of Chromium Boride-chromium Carbide Composites
Matsushita Jun-Ichi,Shimao Kenji,Machida Yoshiyuki,Takao Takumi,Iizumi Kiyokata,Sawada Yutaka,Shim Kwang-Bo 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Several boride sintered bodies such as , , and were previously reported. In the present study, the sinterability and physical properties of chromium boride containing chromium carbide sintered bodies were investigated in order to determine its new advanced material. The samples were sintered at desired temperature for 1 hour in vacuum under a pressure by hot pressing. The relative density of sintered bodies was measured by Archimedes' method. The relative densities of addition of 0, 5, 10, 15 and 20 mass% composites were 92 to 95%. The Vickers hardness of the with 10 and 15 mass% composites were about 14 and 15 GPa at room temperature, respectively. The Vickers hardness at high temperature of the addition of 10 mass% composite decreased with increasing measurement temperature. The Vickers hardness at 1273 K of the sample was 6 GPa. The Vickers hardness of addition of composites was higher than monolithic sintered body. The powder X-ray diffraction analysis detected CrB and phases in containing composites.