|
| Method of Reliability Acceptance for Crawler Crane′s Controller Based on Accelerated Life Test Theory |
| Received:December 18, 2018 Revised:March 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.03.018 |
| KeyWord:crawler crane controller reliability acceptance test accelerated life test accelerated factor |
| Author | Institution |
| XIONG Guo-hua |
1. XuGong Mechanical Construction Machinery Branch, Xuzhou , China |
| SUN Quan |
2. Hunan Ginkgo Reliability Technology Research Institute Co., Ltd, Changsha , China |
| REN Guang-pei |
1. XuGong Mechanical Construction Machinery Branch, Xuzhou , China |
| FENG Jing |
2. Hunan Ginkgo Reliability Technology Research Institute Co., Ltd, Changsha , China |
| LIU Fang |
2. Hunan Ginkgo Reliability Technology Research Institute Co., Ltd, Changsha , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To improve efficiency and effectiveness of reliability acceptance test for controller of crawler crane. Methods With the controller of crawler crane as the object of study, accelerated life test theory was used to design the reliability acceptance test scheme based on operational environment analysis and failure mode effect analysis (FMEA) of controller. By accelerating temperature and relative humidity, and keeping typical vibration and voltage level, an improved time-censoring scheme was obtained based on high temperature and humidity accelerated factors. Results This paper presented an acceptance test scheme of triple comprehensive test (on voltage), including stress profile, accelerated coefficient and parameters and the methods of estimating MTBF based on test results. The integrated accelerated factor of high temperature and humidity was 142.14. Both of producer’s risk α and user′s risk β were 30%. The discrimination ratio d was 2. The minimum acceptable value of MTBF was 30 000 h. The accumulated test time under accelerated condition was 780.92 h. The permissible number of failures was 2. Conclusion This method can obtain the estimated values of reliability indicators and make the judgment of acceptance or rejection in a short period of test time. After acceleration, the acceptance test time of controller is decreased from 111 000 h to 780.92 h which can meet the actual acceptance requirements. |
| Close |
|
|
|