Design and experimental study of a pressure-feedback flow control method for hall-effect electric propulsion systems

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-08-25 DOI:10.1016/j.vacuum.2025.114679

Runzhi Zhu , Luxiang Xu , Shixu Lu , Liexiao Dong , Jian Wang , Ning Guo , Rong Shu

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引用次数: 0

Abstract

To meet the high precision and high stability requirements for propellant flow control in space electric propulsion systems, this study aims to develop a universal flow control module and closed-loop control method based on pressure feedback. Firstly, a mathematical pressure-flow model for straight pipeline sections and throttling devices is established based on principles of fluid mechanics. Then, a dynamic model incorporating time-integration and differentiation correction terms into the traditional model is proposed. Multi-variable linear regression is employed to fit experimental data, enabling precise characterization of mass flow rate responses under low-pressure and low-flow rate conditions. Experimental results show that, under a two-stage pressure reduction structure, there is a strong linear correlation between pressure and mass flow rate (Pearson correlation coefficient

>

0.97,

R^{2} > 0.95

). Closed-loop control results demonstrate that the dynamic model can significantly shorten system response time, with steady-state error reduced to below 0.5 sccm. These findings indicate that the proposed flow control scheme offers fast response and high precision, effectively addressing both internal and external disturbances, and provides theoretical and experimental support for precise propellant flow control in electric propulsion systems.

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霍尔效应电力推进系统压力反馈流量控制方法的设计与实验研究

为满足空间电力推进系统对推进剂流量控制的高精度和高稳定性要求，本研究旨在开发一种基于压力反馈的通用流量控制模块和闭环控制方法。首先，基于流体力学原理，建立了直管段和节流装置的压力-流动数学模型；然后，提出了在传统模型中加入时间积分和微分校正项的动态模型。采用多变量线性回归对实验数据进行拟合，能够精确表征低压、小流量条件下的质量流量响应。实验结果表明，在两级减压结构下，压力与质量流量之间存在较强的线性相关关系（Pearson相关系数>； 0.97, R2>0.95）。闭环控制结果表明，动态模型能显著缩短系统响应时间，稳态误差降至0.5 sccm以下。研究结果表明，所提出的流动控制方案响应速度快，精度高，能有效地解决内部和外部干扰，为电力推进系统中推进剂的精确流动控制提供了理论和实验支持。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.