Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety
The overturning stability and vibration of upland crop machinery under development are important issues for analysis because farms for upland crops are usually uneven, which may cause work-related fatalities, and vibration affects user comfort and reduces the durability of components. In this study,...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/8/4/77 |
| _version_ | 1827701909088108544 |
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| author | Milon Chowdhury Md Nafiul Islam Md Zafar Iqbal Sumaiya Islam Dae-Hyun Lee Dae-Geon Kim Hyeon-Jong Jun Sun-Ok Chung |
| author_facet | Milon Chowdhury Md Nafiul Islam Md Zafar Iqbal Sumaiya Islam Dae-Hyun Lee Dae-Geon Kim Hyeon-Jong Jun Sun-Ok Chung |
| author_sort | Milon Chowdhury |
| collection | DOAJ |
| description | The overturning stability and vibration of upland crop machinery under development are important issues for analysis because farms for upland crops are usually uneven, which may cause work-related fatalities, and vibration affects user comfort and reduces the durability of components. In this study, the overturning stability and vibration of a tractor-mounted radish collector were investigated to ensure safety during radish collection. To analyze lateral stability, the center of gravity (CG) of the tractor-mounted radish collector system was calculated mathematically. Then, a simulation was performed to determine the lateral overturning angles at different folding positions of the radish conveyor belt and load conditions, and the results were validated through tests. Vibration sensors were used to measure the vibration levels and the power spectrum density (PSD) was obtained to check the cyclic apparatuses of the major frequencies. The load conditions, different conveyor speeds, and locations were considered as factors affecting the vibration levels. Considering the physical parameters of the tractor–collector system, the analytical overturning angle was 30.5°. The average overturning angle difference between the simulation and validation was 5°, and the difference between loaded and unloaded conditions was 2°. For 0, 45, and 90° folding positions of the conveyor belt, overturning angles increased and varied from 0.5 to 1°. The vibration level was greater under the unloaded conditions and increased with an increase in the conveyor speed. Vibrations under the loaded condition (0.37~0.48 ms<sup>−2</sup>) satisfied the ISO (International Organization for Standardization) standard (except the first conveyor belt). According to the PSD analysis, high magnitude peaks (>25 dB) appeared frequently in all directions, which indicates a high possibility of damage to the first conveyor belt. This study provides useful information for improving the safety and durability of agricultural machinery for uneven and sloped field conditions. |
| first_indexed | 2024-03-10T14:43:57Z |
| format | Article |
| id | doaj.art-8381e678dcc4450d80bf2f9e11b1126d |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-10T14:43:57Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-8381e678dcc4450d80bf2f9e11b1126d2023-11-20T21:31:32ZengMDPI AGMachines2075-17022020-11-01847710.3390/machines8040077Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User SafetyMilon Chowdhury0Md Nafiul Islam1Md Zafar Iqbal2Sumaiya Islam3Dae-Hyun Lee4Dae-Geon Kim5Hyeon-Jong Jun6Sun-Ok Chung7Department of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon 34134, KoreaDepartment of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon 34134, KoreaDepartment of Biological and Agricultural Engineering, College of Agriculture and Life Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Smart Agricultural Systems, Graduate School, Chungnam National University, Daejeon 34134, KoreaDepartment of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon 34134, KoreaKorea Agricultural Machinery Industry Cooperative, Cheonan 31041, KoreaNational Academy of Agricultural Science, RDA, Jeonju 54875, KoreaDepartment of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon 34134, KoreaThe overturning stability and vibration of upland crop machinery under development are important issues for analysis because farms for upland crops are usually uneven, which may cause work-related fatalities, and vibration affects user comfort and reduces the durability of components. In this study, the overturning stability and vibration of a tractor-mounted radish collector were investigated to ensure safety during radish collection. To analyze lateral stability, the center of gravity (CG) of the tractor-mounted radish collector system was calculated mathematically. Then, a simulation was performed to determine the lateral overturning angles at different folding positions of the radish conveyor belt and load conditions, and the results were validated through tests. Vibration sensors were used to measure the vibration levels and the power spectrum density (PSD) was obtained to check the cyclic apparatuses of the major frequencies. The load conditions, different conveyor speeds, and locations were considered as factors affecting the vibration levels. Considering the physical parameters of the tractor–collector system, the analytical overturning angle was 30.5°. The average overturning angle difference between the simulation and validation was 5°, and the difference between loaded and unloaded conditions was 2°. For 0, 45, and 90° folding positions of the conveyor belt, overturning angles increased and varied from 0.5 to 1°. The vibration level was greater under the unloaded conditions and increased with an increase in the conveyor speed. Vibrations under the loaded condition (0.37~0.48 ms<sup>−2</sup>) satisfied the ISO (International Organization for Standardization) standard (except the first conveyor belt). According to the PSD analysis, high magnitude peaks (>25 dB) appeared frequently in all directions, which indicates a high possibility of damage to the first conveyor belt. This study provides useful information for improving the safety and durability of agricultural machinery for uneven and sloped field conditions.https://www.mdpi.com/2075-1702/8/4/77radishcollectorlateral stabilityvibrationuser safety |
| spellingShingle | Milon Chowdhury Md Nafiul Islam Md Zafar Iqbal Sumaiya Islam Dae-Hyun Lee Dae-Geon Kim Hyeon-Jong Jun Sun-Ok Chung Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety Machines radish collector lateral stability vibration user safety |
| title | Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety |
| title_full | Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety |
| title_fullStr | Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety |
| title_full_unstemmed | Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety |
| title_short | Analysis of Overturning and Vibration during Field Operation of a Tractor-Mounted 4-Row Radish Collector toward Ensuring User Safety |
| title_sort | analysis of overturning and vibration during field operation of a tractor mounted 4 row radish collector toward ensuring user safety |
| topic | radish collector lateral stability vibration user safety |
| url | https://www.mdpi.com/2075-1702/8/4/77 |
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