Development of spherical ultrasonic motor for space. Evaluations of durability under low temperature environment and temperature cycle
Development of spherical ultrasonic motor for space. Evaluations of durability under low temperature environment and temperature cycle
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发表时间：
2016-10
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通讯作者：
Taro Oohashi;Uichi Nishizawa;S. Toyama
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作者：
Taro Oohashi;Uichi Nishizawa;S. Toyama
本研究的目的是用球形超声波马达（SUSM）代替太空中使用的推进器（空间部件）。如果用SUSM开发多个推进器，我们将能够减轻重量，从而缩小人造卫星的尺寸。在之前的研究中，我们成功地进行了SUSM在大气压力和高温下的耐久性测试[1，2]。在本研究中，我们进行了低温下的SUSM耐久性测试，并进行了重复高温和低温的温度循环实验。我们在-80 °C低温环境下进行了耐久性实验，在保持SUSM性能的同时，实现了累计行驶时间超过60分钟。
The purpose of this research is to replace thrusters (space components) used in space with spherical ultrasonic motors (SUSMs). If developing multiple thrusters with SUSMs, we will be able to save weight and as a result, downsize an artificial satellite. We successfully conducted a durability test of the SUSM under atmospheric pressure at high temperature in the prior research [1, 2]. In this research, we conduct a durability test of the SUSM at low temperature, and additionally, an experiment of temperature cycle repeating high temperature and low temperature. We conducted the durability experiment at –80°C in the low temperature environment, and achieved the accumulated driving hours more than 60 minutes as keeping the SUSM performance.