一、前言 为了防止超高真空宇宙环境中造成润滑油蒸汽成分的污染,人们正在研究和利用固体润滑剂。 以1981年2月11日发射的Ⅳ型技术试验卫星(ETS—Ⅳ)为例,其搭载试验设备——扫描型地球传感器(HOST)的旋转机构采用的就是固体润滑。这种地球传感器虽然是作为三轴姿态控制用姿态检测装置研制的,但考虑到是在自旋卫星上进行搭载,故将其旋转头的功能按照旋转的和不旋转的两 I. Introduction In order to prevent the ultra-high vacuum environment caused by the lubricating oil vapor pollution, people are studying and using solid lubricants. Taking the Type IV Technical Test Satellites (ETS-IV) launched on February 11, 1981 as an example, the rotating mechanism equipped with a test equipment-a scanning earth sensor (HOST) uses solid lubrication. Although this earth sensor was developed as a posture detection device for three-axis attitude control, it is considered that the earth sensor is mounted on a spin satellite, and therefore, the function of the rotary head is set to be two