| Budget Amount *help |
¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Outline of Final Research Achievements |
For the purpose of realizing a capsule medical robot, we build micro ultrasonic motors using new stators with an approximately one cubic millimeter. To evaluate its representative performance values, we built an experimental setup and operated the prototype motor by varying experimental conditions, such as the preload between the stator and rotor and the amplitude of voltages applied to motor. We designed a miniature preload mechanism using a micro coil spring to provide force between the stator and rotor along the radial direction of the rotor. Output torque obtained in experiments is much larger than comparable-sized ultrasonic motors. In addition, the prototype stator is miniaturized to the smallest size, a metallic cube with a side length of 0.5 mm. This proposed ultrasonic motor is the smallest and most powerful and suited for medical applications such as capsule robots.
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