双组元统一推进系统优化改进技术进展

不断提高推进剂在轨管理效率,是应用卫星对推进系统的基本要求,也是推进系统的重要发展方向。推进剂剩余量在轨高精度测量和并联贮箱均衡排放主动控制,是提高推进剂在轨管理效率的重要技术手段。针对我国SAST-5000卫星平台双组元统一推进系统,开展了气体注入压力激励方法的关键技术攻关,并取得重要进展。研究结果表明：改良型气体注入压力激励法的推进剂剩余量在轨测量精度达到-0.68%-0.66%,并联贮箱均衡排放控制措施将被动调节的不均衡度控制在优于1.13%,主动纠偏措施还可进一步提高并联贮箱排放推进剂的同步性。

Progress of optimization for bipropellant uniform propulsion system

Application satellites have a great demand on improving the efficiency ot on-boara management of propellant, which is also the demand of propulsion system development. The high-accuracy on-board gauging of the propellant remaining quantity and equalizing expulsion active control of parallel tanks are the important technological means for improving the on-board management efficiency of propellant. The propellant gauging technology using gas injecting method and the technology for equalizing expulsion of parallel propellant tanks were investigated for Chinese SAST-5000 satellite platform. The research result shows that the on-board gauging precision of gas injecting method is -0.68% to 0.66%, and the equalizing expulsion of parallel propellant tanks is 1.13%. The active correction measures can also improve the synchronization of propellant expulsion of parallel tanks.