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Thermal Vacuum and Swivel Table Tests of a CMG and Fault Mechanism Analysis

机译：CMG的热真空和转台测试及故障机理分析

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摘要

Thermal vacuum and swivel table tests of a control moment gyroscope (CMG) are designed and the start-up hesitation and rotation break of the CMG are analyzed. In order to study the fault mechanism, a thermo-structural coupling simulation was performed on the CMG under the temperature conditions of 60 degrees C and approximately 20 degrees C, as well as the static and dynamic working conditions of the swivel table and gimbal. The simulation results show that the main reason for the start-up hesitation and rotation break of the gimbal is an elliptical deformation in different circumferential positions of the gimbal shell and the gimbal bearing. Under certain combinations of temperature and dynamic conditions, the shrinkage of the radial and axial clearances of the gimbal bearing causes the faults, which is consistent with the test results. The test and simulation results are also helpful in determining the temperature limits of the CMG under different conditions and can help improve their thermal design.
机译：设计了控制力矩陀螺仪（CMG）的热真空和旋转台测试，并分析了CMG的启动迟滞和旋转中断。为了研究故障机理，在60摄氏度和约20摄氏度的温度条件下以及旋转工作台和万向架的静态和动态工作条件下，对CMG进行了热-结构耦合仿真。仿真结果表明，万向节启动迟滞和旋转断裂的主要原因是在万向节壳和万向节轴承不同圆周位置的椭圆形变形。在一定的温度和动态条件下，万向节轴承径向和轴向间隙的收缩会引起故障，这与测试结果是一致的。测试和仿真结果还有助于确定CMG在不同条件下的温度极限，并有助于改进其热设计。

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  • 来源
    《Journal of aerospace engineering》 |2018年第5期|04018069.1-04018069.12|共12页
  • 作者

    Liu Shouwen; Huang Shouqing; Lu Lu; Huang Xiaokai; Wang Xiaowei; Zhou Yuan;

  • 作者单位

    Beijing Inst Spacecraft Environm Engn, Beijing Key Lab Environm & Reliabil Test Technol, 104 Youyi Rd, Beijing 100094, Peoples R China;

    Beijing Inst Spacecraft Environm Engn, Beijing Key Lab Environm & Reliabil Test Technol, 104 Youyi Rd, Beijing 100094, Peoples R China;

    Army Engn Univ PLA, Inst Commun Engn, 2 Yudao Rd, Nanjing 21007, Jiangsu, Peoples R China;

    Beijing Inst Spacecraft Environm Engn, Beijing Key Lab Environm & Reliabil Test Technol, 104 Youyi Rd, Beijing 100094, Peoples R China;

    China Acad Space Technol, Beijing Inst Control Engn, 104 Youyi Rd, Beijing 100094, Peoples R China;

    Beijing Inst Spacecraft Environm Engn, Beijing Key Lab Environm & Reliabil Test Technol, 104 Youyi Rd, Beijing 100094, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Control moment gyroscope; Thermal simulation; Bearing; Thermal vacuum test; Fault mechanism;

    机译：控制力矩陀螺仪;热模拟;轴承;热真空试验;故障机理;

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