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进入20世纪后期固体火箭已面临多种挑战,而美国首先应认真考虑增加研究和发展计划的投资,为即将到来的21世纪打下坚实的技术基础。他们还必须改变20年来对某些方面的忽视,发展新的技术,以减小风险、缩短研制时间及降低推进系统的研制费用,满足客户不断变化的要求。 1 航天领域目前最紧迫的要求是研制低成本进入空间的新型大尺寸固体火箭助推器;空间寿命长的、性能和工作范围扩展的先进的轨道转级;以及未来战术武器推进系统用的信号特征小、
The solid rocket entering the late twentieth century has faced many challenges. The United States should, at the outset, seriously consider investing more in research and development plans, laying a solid technical foundation for the upcoming 21st century. They also have to change 20 years of neglect in certain areas and develop new technologies to reduce risk, shorten development time and reduce development costs of propulsion systems to meet changing customer requirements. 1 The most pressing requirements of the aerospace sector at the moment are the development of new large-size solid rocket boosters for low-cost access to space; advanced orbital rerouting of long-lived space with expanded performance and operating range; and signals for future tactical weapons propulsion systems Small,