摘要
为了能够准确有效地评估现有绝对式光栅尺的可靠性,对当前绝对式光栅尺的可靠度能够有一个定量的分析,因此对目前某型号绝对式光栅尺进行了研究。首先,建立了可靠性模型,然后,引入了相似比较法和国家军用标准GJB/Z299C《电子设备可靠性预计手册》中常用的元器件应力法对该光栅尺进行了详细的预计,定量地预测其可靠性水平,最后,给出了预计结果,对预计的结果进行了分析,找出系统薄弱环节,给出了提高可靠性的对策。结果表明:可靠性预计的结果表明该型号的的绝对式光栅尺的平均无故障间隔时间11987h达到了原目标要求的10000h。该方法具有实用性,能够利用此方法来对绝对式光栅尺的可靠性进行预计,而且评价出的可靠性水平可以指导该绝对式光栅尺的可靠性测试与试验。
In order to assess the reliability of existing absolute linear encoder accurately,and have a quantitative analysis for the reliability of the absolute encoder,therefore the present certain type absolute encoder is studied. Firstly,reliability model was established,and then,the detailed prediction was given for the absolute linear encoder,the quantitative prediction of the reliability level was given by the similarity comparison method and the common components stress method of the national military standard GJB / Z299 C electronic equipment reliability prediction Handbook.,Finally,the expected results was given,the expected results was analyzed,the weak links of system was found,the countermeasures to improve the reliability was given. The results showed that： the results of reliability prediction showthat the MTBF 11987 h of the model absolute linear coder achieved the original goal 10000 h. The method has the practicability,the reliability of absolute encoder can be predicted by using this method,and the reliability level of evaluation can guide the reliability test of the absolute encoder.
出处
《组合机床与自动化加工技术》
北大核心
2015年第10期98-100,共3页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家科技重大专项:高档数控机床与基础制造装备项目(92013ZX04007021)
长春市科技计划项目:高集成化单码道绝对式光栅尺研发(2013254)
关键词
可靠性预计
绝对式光栅
元器件应力法
reliability prediction
absolute linear encoder
component stress method
