Volume 39 Issue 5
Sep.  2019
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AN Liangang, YANG Mingxing, QI Xin, WANG Ke, GUI Sujia. Rigid Falling Sphere Technics in Air Observation[J]. Chinese Journal of Space Science, 2019, 39(5): 655-661. doi: 10.11728/cjss2019.05.655
Citation: AN Liangang, YANG Mingxing, QI Xin, WANG Ke, GUI Sujia. Rigid Falling Sphere Technics in Air Observation[J]. Chinese Journal of Space Science, 2019, 39(5): 655-661. doi: 10.11728/cjss2019.05.655
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Rigid Falling Sphere Technics in Air Observation

doi: 10.11728/cjss2019.05.655 cstr: 32142.14.cjss2019.05.655

  • National Defense Science and Technology Key Laboratory of Solid Rocket Motor Combustion, Internal Flow and Thermo-Structure, Institute of Xi'an Aerospace Solid Propulsion Technology, Xi'an 710025

  • Received Date: 2018-07-05
  • Rev Recd Date: 2019-02-26
  • Publish Date: 2019-09-15
    Abstract
  • In order to increase the height range of air observation, the rigid falling sphere technics is researched. Taking a 7-inch rigid falling sphere for instance, the trajectory simulation has been done. Along with the reference atmospheric data, the quantity of the acceleration that the sphere should bear is reckoned, showing the strict requirement for the acceleration measurement accuracy. The amount of interference of accessional portion of acceleration caused by lever arm effect is analyzed. Some drag calculation method and error are discussed and compared. The risk of EMC and the needs of miniaturized design are also considered. With the working principle of the rigid falling sphere and the analysis of its key technical features mentioned above, a type of rigid falling sphere design has been done, including the kinetic parameter measuring, the lever arm effect restraining, and the overall index design. One of the three rigid falling sphere manufactured and tested was launched, almost all of measuring data along the trajectory was obtained. Through the comparative analysis between the really measuring data acquired during the demonstration flight test and that resulted from the simulation, the technical proposal has been proved to be feasible and rational, and a clear path for further research is established.

     

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