基于精度的球铰模糊可靠性寿命模型构建及评估方法
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陈爽,李仕华,孙静
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Model construction and evaluation method of fuzzy reliability life of spherical hinge based on accuracy
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Shuang CHEN,Shihua LI,Jing SUN
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表 1 3-RPS并联机构结构参数和动力学参数 |
Tab.1 Structural parameters and dynamic parameters of 3-RPS parallel mechanism |
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参数 | 数值 | | 参数 | 数值 | 动平台质量mA/kg | 8.509 1 | | 动平台转动惯量矩阵J7/(kg·mm2) | $ \left[ {\begin{array}{*{20}{c}} {65{\text{ }}231}&0&0 \\ 0&{65{\text{ }}231}&0 \\ 0&0&{129{\text{ }}766} \end{array}} \right] $ | 活塞杆质量m4~m6/kg | 0.521 8 | 缸体质量m1~m3/kg | 1.841 2 | 活塞杆质心到球副中心距离la/mm | 100.5 | | 活塞杆转动惯量矩阵J4~J6/(kg·mm2) | $ \left[ {\begin{array}{*{20}{c}} {1{\text{ }}969}&0&0 \\ 0&{1{\text{ }}969}&0 \\ 0&0&{27} \end{array}} \right] $ | 缸体质心到转动副中心距离lb/mm | 94.5 | 球副与转动副初始中心距离L0/mm | 320.0 | 动系原点与定系的初始距离H0/mm | 341.2 | | 缸体转动惯量矩阵J1~J3/(kg·mm2) | $ \left[ {\begin{array}{*{20}{c}} {8{\text{ }}343}&0&0 \\ 0&{8{\text{ }}332}&0 \\ 0&0&{450} \end{array}} \right] $ | 动、定平台半径(r、R)/mm | 120.0 | 修正参数α | 50 | 修正参数β | 50 | | |
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