圆锥扫描地球敏感器前置放大电路稳定性分析

圆锥扫描地球敏感器（CES）是航天器的关键测量部件，其前置放大电路具有高增益、低噪声等特点.通过仿真分析得出电缆和器件参数差异显著影响其稳定性，在此基础上介绍电路稳定问题实例，提出采用频率补偿方法解决电路稳定性问题，并针对该方法设计和实施通过了标定测试、热真空试验和EMC试验，证明该方法完全有效.

Analysis on Preamplifier Circuit Stability of the Conical Scanning Earth Sensor

The conical earth sensor （CES） is a key measuring instrument of spacecraft． The preamplifier of CES has high gain and low noise characteristics． By simulation analysis, we find out that different parameters of cable and device remarkably affect the circuit’s stability． Based on this, an example of circuit stability problem is presented． To solve this problem, a kind of frequency compensation method is carried out． To confirm this method validity, a series of ground experiments including calibration test, thermal vacuum test and EMC test are designed and performed．