| 基于任务多样性的农机装备维修策略研究 |
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| 引用本文： | 柳剑,王世友,李巧菲.基于任务多样性的农机装备维修策略研究[J].农业机械学报,2022,53(S2):69-74. |
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| 作者姓名： | 柳剑 王世友 李巧菲 |
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| 基金项目： | 国家自然科学基金项目（51905450）和中央高校基本科研业务费专项（SWU114038、XDJK2015B008） |
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| 摘 要： | 目前农机装备维修策略的研究主要以装备故障数据或退化数据为依据，往往无法保证装备在某一具体作业过程中的任务成功性，从而很难满足现代农业对农机装备高任务完成度的要求。针对这一问题，提出了一种基于任务多样性的农机装备维修策略。首先，根据农机装备在具体作业过程中多阶段任务的特征，分析了农机装备各系统退化状态与装备任务可靠性之间的关联关系，建立了农机装备任务可靠性评估模型；其次，利用蒙特卡罗法模拟农机装备实际作业情况，给出了农机装备任务可靠性的综合评估流程，并对多作业任务下的农机装备任务可靠性进行定量化描述；再次，基于农机装备任务可靠性和维修成本的关联性，以最低可靠度和最低维修成本为约束条件，得到了装备各系统的最佳维修不等周期和最优维修次数；最后，引入机会维修策略，建立了农机装备的维修优化模型，并根据最佳机会维修阈值确定农机装备最优维修计划安排。以国产某轮式拖拉机的历史故障数据和维修成本数据为例，确定了该拖拉机故障率较高的4个子系统以及2个作业任务剖面，在整机可靠度阈值为0.8的情况下，得到了不同机会维修阈值下的最优维修费用分布情况。当最佳维修阈值为8h时，维修成本最低，为2.587元，通过与农机装备传统维修策略相比，总维修费用降低了30.4%。
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| 关 键 词： | 农机装备 任务可靠性 机会维修 维修成本 |
| 收稿时间： | 2022/6/30 0:00:00 |
Maintenance Strategy of Agricultural Machinery Equipment Based on Task Vari |
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| LIU Jian,WANG Shiyou,LI Qiaofei.Maintenance Strategy of Agricultural Machinery Equipment Based on Task Vari[J].Transactions of the Chinese Society of Agricultural Machinery,2022,53(S2):69-74. |
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| Authors: | LIU Jian WANG Shiyou LI Qiaofei |
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| Institution: | Southwest University |
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| Abstract: | The current research on the maintenance strategy of agricultural equipment is mainly based on equipment failure data and degradation, which often cannot guarantee the task success of the equipment in a specific operation process, thus making it difficult to meet the requirements of modern agriculture for high task completion of agricultural equipment. To address this problem, a task-based maintenance strategy for agricultural machinery and equipment was proposed. Firstly, based on the correlation between the degradation state of each system of agricultural equipment and the task reliability of the equipment, an assessment model of the task reliability of agricultural equipment was established. Secondly, using the Monte Carlo method, a comprehensive assessment process of the task reliability of agricultural equipment was given, and the task reliability of agricultural equipment under multiple operational tasks was described quantitatively. Then, based on the correlation between the task reliability of agricultural equipment and the maintenance cost, an algorithmic model of the optimal maintenance inequality cycle and optimal maintenance times for each system, which met the constraints of minimum reliability and minimum maintenance cost, was established. Finally, an opportunity maintenance strategy was adopted to establish a maintenance optimization model for agricultural equipment. Taking the historical fault data and maintenance cost data of domestic wheel tractors as examples, the optimal maintenance schedule arrangement based on the optimal opportunity maintenance threshold was obtained. When the optimal maintenance threshold was 8h, the maintenance cost was 2.587 yuan. Compared with the traditional maintenance strategy of agricultural machinery equipment, the total maintenance cost was reduced by 30.4%. The proposed method was helpful to improve the task completion rate of agricultural machinery equipment, reduce the failure rate and maintenance loss of agricultural machinery equipment. |
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| Keywords: | agricultural machinery equipment mission reliability opportunity maintenance maintenance costs |
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