| Research Abstract |
Toward the next decade, several schemes sending an unmanned mobile explorer to the moon or Mars are being planned for scientific exploration. Japanese space agencies are also planning some missions launching unmanned scientific explorers to the moon.
On the other hand, the researches, and the developments of application, for the ultrasonic technologies gives new possibility to space applications. The ultrasonic vibration can be focused on some part, and it makes strong power, which can scrape away a metal and a rock, can radiate heat, and can move objects. Basically, it is the advantage that the ultrasonic technologies don' t have any moving parts. In this research, applications in the space for the ultrasonic technologies are discussed, especially, a ultrasonic actuator, and a scientific processing instrument for a rock. Moreover, UltraSonic Motor (USM) is applied
environmental examinations, as an ultrasonic actuator and vibrator, and an adaptation of ultrasonic technologies for space environment is discussed. Because, USM as an ultrasonic vibrator is a basic element for all of ultrasonic instruments, and it is also an important element for a mechanical systems.
USM were applied "thermal cycle test", "radiation exposure test", "launching vibration test", "vacuum environmental test" and "thermal vacuum environmental test", as space environmental examinations. As a result, it indicated some problem on a lining material at thermal vacuum environment test. A lining material is located on the contact surface between a rotor and a stator, and it is under high pressure getting a rotation torque and maintenance torque. Therefore, some candidates of lining materials are going to be examined by those tests. However, it could be passed another examinations, and it indicates adaptability of USM for space environment. Finally, a small, lightweight, micro 5DOF manipulator was developed and effectiveness of USM for serial link mechanisms were discussed and indicated.
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