引言目前为止,利用火箭发射人造卫星,并投送到预定轨道上,是一种有效的空间运载手段,这也对火箭可靠性提出了很高的要求。20世纪六七十年代,在美国的支持下,日本政府通过优惠的引进政策,开始大力发展火箭技术。日本从美国先后引进德尔塔火箭及发动机生产技术、大力神火箭技术、德 INTRODUCTION So far, the use of rockets to launch artificial satellites and deliver them to a predetermined orbit has proved to be an effective means of space transportation, which places high demands on rocket reliability. In the 1960s and 1970s, with the support of the United States, the Japanese government began to vigorously develop rocket technology through preferential import policies. Japan from the United States has introduced the Delta rocket and engine production technology, Hercules rocket technology, Germany