1 引言石川岛播磨重工业公司正在研制由宇宙科学研究所(ISAS)负责研制的月球探测卫星(LUNAR-A)搭载的双元液体统一推进系统(ORPS),LUNAR-A计划于1997年用M-V火箭第2发箭发射。它也是日本的第一颗月面探测卫星,星上载有穿测器(LPM),它将穿入月面测量月震和月表面的热流量。为出色地完成飞行任务,配备一个先进的推进系统很重要。这一系统不仅要完成复杂的变轨控制,还要进行高精度的姿态控制,推力器的比冲要比迄今所开发的任何一种推力器都高。ISAS在对若干种推进系统比较后决定选用石川岛播磨重工业公司研制的推力为500N的双元液体推进系统,而放弃了传统的固体推力器。姿态控制用1N和20N推力器(RCS)与双元液体发动机共用贮箱,部件均配置在同一构体上,组成一个轻量化的、统一的推进系统。本文介绍了这种双元液体统一推进系统的开发现状和要解决的主要技术问题。 1 INTRODUCTION Ishikawa Shima Industries Co., Ltd. is developing the Dual Liquid Unified Propulsion System (ORPS) for Lunar Exploration Satellite (LUNAR-A) under the supervision of the Institute of Astrophysics (ISAS) The first two arrows fired. It is also Japan’s first lunar exploration satellite, which carries a penetration detector (LPM) that will penetrate the lunar surface to measure the heat flow from the moon and moon surfaces. For a successful mission, it is important to have an advanced propulsion system. This system not only performs complicated orbit control but also performs high-precision attitude control. The thruster’s impulse is higher than any thrusters developed so far. After comparing several propulsion systems, ISAS decided to use the 500N propulsion dual element propulsion system developed by Ishikawa Shoton Heavy Industries and abandoned the traditional solid thrusters. Attitude Control The 1N and 20N thrusters (RCS) share a tank with a binary fluid engine, all of which are housed in the same structure to form a lightweight, unified propulsion system. This article describes the status quo of the development of this dual liquid unified propulsion system and the major technical issues to be solved.