加强筋板厚度变化对四通性能的影响分析

The change in reinforce rib of centerpart influence on it's performance

系统转动惯量增大时,望远镜系统的跟踪性能下降,稳定裕量减小,过渡过程时间增长,大角度调转时间增加,这些都不利于提高系统性能.通过对望远镜大型结构件四通在两种不同厚度焊接加强筋板时的分析和性能比较,得出将加强筋板厚度由10mm减小为6mm,四通的结构强度有所下降但在允许范围内;一阶谐振频率有所增加;四通质量和转动惯量数值分别减少(18～16)%.厚度的变化有利于系统性能的提高和成本的节约.

When system's inertia moment increase,the telescope's tracking performance decrease,Stability margin decreases,transient time and slew time increases,all these are harmful to system performance.By analyzing the deference thickness of the centerpart's reinforce rib we can draw the conclusion that the change in reinforce rib of centerpart can increase system performance and can save mechanical machining cost.