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Design and test of a micro digital thruster

机译：微型数字推进器的设计与测试

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摘要

To meet the requirement of the space applications, digital thrusters with larger scale units should be employed, which means that the dimension of each thruster unit should be further reduced. In this paper, the system function structure for the satellite attitude control is introduced and a micro arrayed thruster is designed to improve the ignition properties in tiny chambers. A four layers structure of the micro thruster unit is presented and the ignition resistor is studied in detail. The structural mechanics analyzing results and the fabrication sample are presented. As an important part, the solid propellant is analyzed and the prescription is presented. To improve the uniformity of the propellant loading, a special device is developed by which the propellant can be once loaded into the array. To test the performance of the thruster, we developed an optical measurement system based on a pendulum structure. The system principle is introduced and a series of mathematical model was established. The impulse measurement system based on laser interference is presented. By this system, the impulse property of the micro thruster based on the solid propellant is studied and the test results are analyzed.
机译：为了满足空间应用的需求，应使用具有更大尺寸单元的数字推进器，这意味着每个推进器单元的尺寸应进一步减小。本文介绍了用于卫星姿态控制的系统功能结构，并设计了微阵列推进器以改善小舱室内的点火性能。提出了微型推进器单元的四层结构，并详细研究了点火电阻。给出了结构力学分析结果和制造样本。作为重要部分，对固体推进剂进行了分析并提出了处方。为了提高推进剂装载的均匀性，开发了一种特殊装置，通过该装置可以将推进剂立即装载到阵列中。为了测试推进器的性能，我们开发了基于摆结构的光学测量系统。介绍了系统原理，建立了一系列数学模型。提出了一种基于激光干涉的脉冲测量系统。通过该系统，研究了基于固体推进剂的微型推进器的脉冲特性，并对测试结果进行了分析。

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  • 来源
  • 会议地点 San Diego CA(US)
  • 作者

    Dahai Ren; Gaofei Zhang; Xiaolu Wang; Zheng You;

  • 作者单位

    State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument and Mechanics, Tsinghua University, Beijing, 100084, China;

    State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument and Mechanics, Tsinghua University, Beijing, 100084, China;

    State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument and Mechanics, Tsinghua University, Beijing, 100084, China;

    State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument and Mechanics, Tsinghua University, Beijing, 100084, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    thruster; MEMS; propellant; laser interference; impulse;

    机译：推进器MEMS;推进剂激光干扰冲动;

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