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日本空间开发事业团(NASDA)正在进行HOPE(由H-Ⅱ发射入轨的轨道飞行器)的基本方案设计,当前研究的目的是建立HOPE可行的方案和做好技术基础准备。HOPE的主要任务是为自由号航天站/日本实验舱(JEM)提供后勤运输服务。除了以前研究的由H-Ⅱ运载火箭发射的10吨级轨道飞行器的方案外,考虑到今后H-Ⅱ运载火箭性能会得到提高,还研究了体积和重量增大的各种轨道飞行器方案,其中之一为发射重量为20吨,并有3～5吨有效载荷能力的轨道飞行器。各分系统的设计和在诸如气动、结构、材料、制导、导航和控制领域中的技术研究正在进行。为了获得再入轨道飞行数据,已计划利用1993年H-Ⅱ试飞机会,对此种轨道飞行器作轨道再入试验,并着手做这方面技术准备工作。
The Japan Space Development Agency (NASDA) is conducting the basic design of the HOPE (orbital vehicle launched into orbit by H-II). The purpose of the present study is to establish a viable solution to HOPE and to prepare technologically. HOPE’s primary mission is to provide logistics services for the JL / JEM. In addition to the previously studied scheme of a 10-ton orbital vehicle launched by an H-II launch vehicle, considering the future performance of the H-II launch vehicle will be improved, various orbital spacecraft programs of increasing volume and weight have also been studied, of which One of them is an orbital aircraft that has a payload of 20 tons and a payload of 3 to 5 tons. The design of subsystems and technical studies in areas such as aerodynamics, structure, materials, guidance, navigation and control are under way. In order to obtain re-orbital flight data, plans have been made to use the 1993 H-Ⅱ flight test to track orbit re-entry experiments with such orbiting vehicles and proceed with technical preparations in this regard.