ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM
As the real load is very complicated during the process of harvester operation,it is of great significance for the prediction of fatigue life to describe the load characteristics and distribution form accurately. In order to obtain the probability density distribution model of the load cycles. Take...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Journal of Mechanical Strength
2020-01-01
|
| Series: | Jixie qiangdu |
| Subjects: | |
| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.05.016 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841535776446218240 |
|---|---|
| author | SU Fang CHEN XiaoNan WANG ChenSheng ZHAO HaiYan |
| author_facet | SU Fang CHEN XiaoNan WANG ChenSheng ZHAO HaiYan |
| author_sort | SU Fang |
| collection | DOAJ |
| description | As the real load is very complicated during the process of harvester operation,it is of great significance for the prediction of fatigue life to describe the load characteristics and distribution form accurately. In order to obtain the probability density distribution model of the load cycles. Take RF-half shaft torque as the research object,the mixture Gaussian fitting method based on EM was suggested. n Code software was used for rain flow counting and the load cycle was described with the vector S.The cluster number and cluster center loading were got from the clustering of the loading cycle by the SPSS software,and using EM algorithm to resolve the mean and covariance matrix of Gaussian component. The index value of SSE and RSME are close to0,but R and Raare both up to 0. 85 based on the index model. It showed that the Gaussian mixture indeed fitting out of the original data of load-cycle. The results of research can provide a theory evidence for the fatigue life analysis and load spectrum extrapolation. |
| format | Article |
| id | doaj-art-59534aa3f004412eba5da782316e8590 |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2020-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-59534aa3f004412eba5da782316e85902025-01-15T02:27:15ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692020-01-01421119112430609055ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHMSU FangCHEN XiaoNanWANG ChenShengZHAO HaiYanAs the real load is very complicated during the process of harvester operation,it is of great significance for the prediction of fatigue life to describe the load characteristics and distribution form accurately. In order to obtain the probability density distribution model of the load cycles. Take RF-half shaft torque as the research object,the mixture Gaussian fitting method based on EM was suggested. n Code software was used for rain flow counting and the load cycle was described with the vector S.The cluster number and cluster center loading were got from the clustering of the loading cycle by the SPSS software,and using EM algorithm to resolve the mean and covariance matrix of Gaussian component. The index value of SSE and RSME are close to0,but R and Raare both up to 0. 85 based on the index model. It showed that the Gaussian mixture indeed fitting out of the original data of load-cycle. The results of research can provide a theory evidence for the fatigue life analysis and load spectrum extrapolation.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.05.016HarvesterMixture of Gaussian functionParameter estimateRainflow methodDistribution estimation |
| spellingShingle | SU Fang CHEN XiaoNan WANG ChenSheng ZHAO HaiYan ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM Jixie qiangdu Harvester Mixture of Gaussian function Parameter estimate Rainflow method Distribution estimation |
| title | ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM |
| title_full | ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM |
| title_fullStr | ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM |
| title_full_unstemmed | ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM |
| title_short | ESTIMATION METHOD OF LOAD SPECTRUM DISTRIBUTION BASED ON EM ALGORITHM |
| title_sort | estimation method of load spectrum distribution based on em algorithm |
| topic | Harvester Mixture of Gaussian function Parameter estimate Rainflow method Distribution estimation |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.05.016 |
| work_keys_str_mv | AT sufang estimationmethodofloadspectrumdistributionbasedonemalgorithm AT chenxiaonan estimationmethodofloadspectrumdistributionbasedonemalgorithm AT wangchensheng estimationmethodofloadspectrumdistributionbasedonemalgorithm AT zhaohaiyan estimationmethodofloadspectrumdistributionbasedonemalgorithm |