空间光学遥感器质量分配设计

Design of Mass Distribution of Space Remote Sensor

为了使光学元件的动态响应变得尽可能小并满足质量指标,需要对空间光学遥感器的质量进行分配。通过建立空间光学遥感器的全阻尼动态分析模型,得到了光学元件动态响应的表达式。根据该表达式讨论了不同动力学系统的动态放大特点。然后从实际工程条件出发,通过MATLAB编程进行了数值分析,讨论了使光学元件响应尽量小的质量分配条件。结果表明,当阻尼比均为0.03、频率比β为1.3、质量比为0.51时,光学元件的动态响应接近最小值。本文依据理论公式提出的这种方法可通过图形判读结果,因此具有结果可靠、简单便捷等特点。

To make optical components have their dynamic response as small as possible and meet the required mass specifications, the mass of a space optical remote sensor should be distributed. By establishing a fnll damping dynamic analysis model for the space optical remote sensor, the expression for the dynamic response of the optical components is obtained. The dynamic amplification characteristics of different dynamic systems are discussed according to the expression. Then, in view of the actual engineering condition, numerical analysis is made via MATLAB programming and the mass distribution condition under which the response of the optical components can be made as small as possible is discussed. The result shows that the optical components have their dynamic response close to the minimum value for a damp ratio of 0.03, a frequency ratio β of 1.3 and a mass ratio of 0.51. Because the method proposed according to the theoretical formula can interpret the result in the formation of chart, it is reliable and easy to use.