固体火箭用于航天飞行已有近30年历史。30年来美国航天发射的历史记录表明,固体火箭发动机工作可靠性相当于或优于液体发动机,研制成本和使用成本则低于液体发功机,因而获得了广泛的应用。当前美国政府正组织航天界积极探索进一步降低运载火箭的成本和提高其可靠性,要实现这一目标,无论对固体技术还是液体技术来说均需进一步提高和发展,但采用固体系统,技术上易于实现,所需投资较低。固体火箭在下一代先进的运载系统中将继续发挥重要作用。 Solid rocket used in space flight nearly 30 years of history. The history of the U.S. space launch over the past 30 years shows that solid rocket motors are more or less reliable than liquid engines and have a lower cost of development and use than liquid generators and are therefore widely used. At present, the U.S. government is organizing the space community to actively explore ways to further reduce the cost and increase the reliability of launch vehicles. To achieve this goal, both solid and liquid technologies need to be further improved and developed. However, using solid-state systems technically Easy to implement, low investment required. Solid rockets will continue to play an important role in the next generation of advanced delivery systems.