星上遥测的精度分析

分析了三轴稳定平台卫星产生遥测测量误差的原因,并对典型星载传感器(热敏电阻、压力变换器、电压)、模拟量通道、A/D变换器等单个误差项目逐一进行了误差分析。根据误差正态分布的特性,得出单个项目的最大测量误差及均方误差,然后合成单个项目的误差,给出整星各种类型被测参数的总误差。最后,根据目前卫星平台的设计现状,提出了进一步提高测量精度的建议。

Accuracy Analysis of On-Board Telemetry Acquirement

At first, this article analyzes the cause of telemetry measurement error in satellite platform. Then the error caused by the on-board sensors (thermistor, pressure sensor, voltage), analogue channeland, A/D converter are calculated. According to normal distribution characteristic of the error, the maximum error and root-mean-square deviation can be analyzed. At last, the article gives total satellite telemetry accuracy by error integration, and the suggestion for improving telemetry accuracy.