一种高精度定量方式在上面级加注系统中的应用

简述了发射北斗导航卫星时上面级加注系统的精度要求以及常规航天推进剂加注系统精度实际情况。为了满足上面级加注系统的高精度要求，引入了一种全新的地面定量方式，即电子秤和气体质量流量控制器联合系统定量方式，并对这种全新的定量方式进行了详细分析和理论计算。分析和试验结果表明，该定量方式正确可行，定量精度高，满足上面级对加注系统高精度的要求。

Application of a High-Precision Quantitative Measurement Method on the Fuelling System of Upper Stage

The accuracy requirements of the fuelling system of upper stage for launching Beidou satellites and the actual accuracy of conventional propellant fuelling system are briefly introduced. A novel ground quantitative measurement method is proposed to meet the high-precision requirements of upper stage on the fuelling system, which combines electronic scale and mass flow rate controller. Detailed theoretical calculation and analysis of the measurement method are conducted, which show that this method has high accuracy and satisfies the requirement of upper stage on fuelling system accuracy.