Finite Element Simulation Analysis of Damping Torque of Space Rotating Object
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摘要: 针对提高空间旋转目标消旋效率的问题,使用电磁场软件MAXWELL对球壳的消旋力矩进行分析。设计并建立了二维亥姆霍兹线圈仿真模型,并对仿真模型进行有效性验证,使用验证后的仿真模型分析了单因素影响下的球壳消旋力矩变化情况,进而对现有的球壳消旋力矩解析式进行修正。仿真结果表明,现有的球壳消旋力矩解析式有其适用条件,适用于厚度与半径之比小于0.023的球壳,新的球壳消旋力矩解析式与原有解析式相比计算误差更小。Abstract: In order to improve the efficiency of the damping torque in the process of electromagnetic braking, the damping torque of spherical shell is analyzed by using the electromagnetic field software MAXWELL. A two-dimensional Helmholtz coil Finite Element Model is designed and established, and the validity of the model is verified. The Finite Element Model is used to analyze the variation trend of damping torque under the influence of each factor individually. Then, the damping torque formula of the spherical shell model is modified. Simulation results show that the damping moment formula of spherical shell model have its applicable conditions, and is suitable for spherical shell with thickness to radius ratio less than 0.023. The calculation error of the new damping torque formula of spherical shell is smaller than the original.
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表 1 中心区域磁感应强度大小
Table 1. Magnitude of magnetic flux density of the center area
Number Magnetic flux density (×10–5)/T 1 5.40084 2 5.40086 3 5.40087 4 5.40086 5 5.40085 6 5.40083 7 5.40080 8 5.40078 9 5.40078 10 5.40081 -
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