摘要
对某周边桁架式大型星载天线展开机构中的齿轮运动副的卡滞失效形式进行了研究。从齿轮啮合的极限位置出发,推导出了同步齿轮副不发生卡滞的条件。综合考虑齿轮加工误差、装配误差和太空环境温度等因素,利用优化算法,构建了齿轮副防卡滞的非概率可靠度计算公式。对同步齿轮副在不同装配误差和不同温度环境下的防卡滞的非概率可靠度进行了预测,并与将运动功能函数中的变量视为正态分布的概率模型下的可靠度相比较,比较结果显示两者的变化趋势相同,而且与数值仿真过程比较吻合,说明本文的方法是合理有效的。
The seizure-preventing reliability of synchronous gears in the deployment mechanism of a large satellite antenna was studied. From the ultimate position of the gearing mesh, the seizure-preventing conditions for the gear pairs were given. With the gears＇ machining tolerances, fitting allowances and the space temperature requirement being considered synthetically, an analytical model for the non-probabilistic reliability of the gear pairs＇ seizure-preventing was established by using the optimization algorithm. The seizure-preventing reliability of synchronous gears was predicted in different fitting allowances and different temperature conditions, and the result was compared with that based on the probabilistic model, in which all variables in the movement function are seen as normal distributed random variables. The trends of their variation were found alike and were agreed well with the experiment, which indicates that the method of this paper is reasonable and practical.
出处
《高技术通讯》
EI
CAS
CSCD
北大核心
2007年第12期1238-1243,共6页
Chinese High Technology Letters
基金
863计划(2006AA04Z402)
陕西省自然科学基金(2005A009)资助项目
关键词
星载天线
同步齿轮
防卡滞
非概率可靠度
satellite antenna, synchronous gear, seizure-preventing, non-probabilistic reliability
