Page 20 - 《真空与低温》2026年第2期

第 32 卷 第 2 期 真空与低温
2026 年 3 月 Vacuum and Cryogenics 139

电 推 进 系 统 压 力 传 感 器 干 扰 分 析 及 抑 制 方 法 研 究

席竹君 1,2,3 ，吴越媛 1,2,3 ，杭观荣 1,2,3
（1. 上海空间推进研究所，上海 201112；
2. 空间高效能推进技术及应用全国重点实验室，北京 101416；
3. 上海空间发动机工程技术研究中心，上海 201112）

摘要：电推进作为空间先进动力系统，通过电离并加速工质气体产生推力，而工质气体的精确稳定供给是保
证电推力器性能稳定达标的重要因素之一。其中压力作为电推进工质流率控制的重要参数，需要较高的稳定性
和精度，而来自系统工作产生的共模干扰会影响压力传感器工作性能。论文分析了电推进系统对压力传感器共
模干扰的原因和途径，研究了干扰机理，提出了在电源控制单元输入侧、压力传感器输入侧与机壳之间加入共模
电容，以及在压力传感器差分信号采集正负接入电容的干扰抑制方法，解决了压力传感器受干扰问题。研究发现
当接入的共模电容分别为 0.01 μF 和 22 μF 时，三个相同的压力传感器最大差值为 0.001 49 MPa。表明该方法对电
推进系统压力传感器抗干扰抑制效果良好，并应用于相关产品。
关键词：电推进系统；压力传感器；共模干扰分析；抑制方法；试验验证
中图分类号：TB71 文献标志码：A 文章编号：1006-7086（2026）02-0139-07
DOI：10.12446/j.issn.1006-7086.2026.02.003

The Research on Interference Analysis and Suppression Methods of Pressure
Transmission in Electric Propulsion System

XI Zhujun 1,2,3 ，WU Yueyuan 1,2,3 ，HANG Guanrong 1,2,3
（1. Shanghai Institute of Space Propulsion，Shanghai 201112，China；2. National Key Laboratory of
Space High Efficiency Propulsion Technology and Application，Beijing 101416，China；
3. Shanghai Space Engine Engineering Research Center，Shanghai 201112，China）

Abstract：As an advanced space propulsion system，electric propulsion generates thrust by ionizing and accelerating a
gaseous propellant，commonly xenon or krypton，which serves as the working medium. The precise and stable supply of the
working gas is a critical factor in ensuring the stable and standardized performance of the electric thruster，as it directly influ-
ences parameters such as specific impulse，thrust level，and overall system efficiency. Among various control parameters，the
pressure of the working gas is particularly important for accurate flow rate regulation in electric propulsion systems，requir-
ing both high stability and measurement accuracy to maintain optimal thruster operation.During system operation，however，
common-mode interference originating from high-frequency switching circuits，power converters，or other electronic subsys-
tems can adversely affect the performance of the pressure sensor. Such interference may lead to measurement deviations，sig-
nal instability，or even sensor malfunction，thereby compromising the reliability of the propulsion system. This paper system-
atically analyzes the origins and propagation paths of common-mode interference affecting the pressure sensor within the
electric propulsion system. The interference mechanism is investigated through both theoretical modeling and experimental
observation， taking into account factors such as electromagnetic coupling， ground loop effects， and power supply
fluctuations.To mitigate these adverse effects，interference suppression methods are proposed and evaluated. These include
the installation of common-mode capacitors between the input side of the power control unit and the pressure sensor，as well

收稿日期：2025−11−23
基金项目：联合基金项目（U22B20130）
作者简介：席竹君，硕士，工程师。E-mail：lynhitwh@163.com