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从第一颗卫星“东方红一号”上天到“神舟号”无人飞船发射已有三十年时间,三十多年来,我国空间技术经历了从无到有、从简单到复杂、从试验到应用和即将从无人到有人的发展过程。今天,我国完全靠自己的力量和技术已初步建立起几类应用卫星系统,这在我国科学技术史上是个了不起的进步。现代航天器不但规模庞大,构形复杂,工作寿命长且精度要求高,而且通过空间交会对接还可形成大型空间增长结构,有的甚至属于变结构和多级控制的复杂航天器系统,这就对航天
From the first satellite “Dongfanghong No.1” to the “Shenzhou” unmanned spacecraft launched for thirty years, more than three decades, China’s space technology has experienced from scratch, from simple to complex, from Test to the application and imminent development from nobody to someone. Today, China has basically established several types of satellite systems for its own use based on its own strength and technology. This is a remarkable advance in the history of science and technology in our country. Modern spacecraft are not only large in size, complex in shape, long in working life and high in precision, but also can form large-scale space growth structures through space rendezvous and docking, and some even belong to complex spacecraft systems with variable structure and multi-level control On the space