...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tribology & Lubricaion Technology >Probabilistic Analysis of Space Shuttle Body Flap Actuator Ball Bearings
【24h】

Probabilistic Analysis of Space Shuttle Body Flap Actuator Ball Bearings

机译：航天飞机襟翼作动器球轴承的概率分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A probabilistic analysis, using the two-parameter Weibull-Johnson method, was performed on experimental life test data from space shuttle actuator bearings. Experiments were performed on a test rig under simulated conditions to determine the life and failure mechanism of the grease lubricated bearings that support the input shaft of the space shuttle body flap actuators. The failure mechanism was wear that can cause loss of bearing preload. These tests established life and reliability data for both shuttle flight and ground operation. Test data were used to estimate the failure rate and reliability as a function of the number of shuttle missions flown. The Weibull analysis of the test data for the four actuators on one shuttle, each with a two-bearing shaft assembly, established a reliability level of 96.9% for a life of 12 missions. A probabilistic system analysis for four shuttles, each of which has four actuators, predicts a single bearing failure in one actuator of one shuttle after 22 missions (a total of 88 missions for a four-shuttle fleet). This prediction is comparable with actual shuttle flight history in which a single actuator bearing was found to have failed by wear at 20 missions.
机译：使用两参数威布尔-约翰逊方法对航天飞机执行器轴承的实验寿命测试数据进行了概率分析。在模拟条件下的试验台上进行了试验，以确定支撑航天飞机机体襟翼执行器输入轴的脂润滑轴承的寿命和失效机理。故障机理是磨损，可能导致轴承预紧力损失。这些测试建立了航天飞机飞行和地面运行的寿命和可靠性数据。测试数据被用来估计故障率和可靠性，作为飞行任务数量的函数。对一个航天飞机上的四个执行器（每个都带有两个轴承的轴组件）的测试数据进行的威布尔分析表明，在执行12次任务时，其可靠性等级为96.9％。对四个航天飞机的概率系统分析，每个航天飞机都有四个执行器，预测一个航天飞机的一个执行器在执行22个任务后（一个四航天飞机的舰队总共执行88个任务）会出现单个轴承故障。该预测与实际的航天飞机飞行历史相当，在该历史中，发现单个执行器轴承在20次任务中由于磨损而失效。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号