Grain Sieve Loss Fuzzy Control System in Rice Combine Harvesters
Grain Sieve Loss Fuzzy Control System in Rice Combine Harvesters
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DOI：
10.3390/app9010114
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
Zhenwei Liang;Yaoming Li;Lizhang Xu
中科院分区：
文献类型：
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作者：
Zhenwei Liang;Yaoming Li;Lizhang Xu
水稻联合收割机清选装置的主要工作部件可以根据监测到的谷物筛分损失，通过设定的控制策略进行实时控制。这是提高联合收割机清理适应性的有效途径，因为联合收割机的主要工作参数可以自动适应作物和环境的变化，从而可以提高相应的清理性能。为了实现基于谷物筛分损耗监测的清选控制目标，开发了一种模糊控制系统。该系统选用S7-1200PLC作为主控单元构建下位机硬件系统，利用梯形图语言完成系统的编写，利用LabVIEW 14.0软件设计上位机界面。通过大量的台架试验，考察了风机转速、导板倾角和筛孔开度对颗粒筛损失和颗粒杂质比的影响。确定了操作参数与性能参数的关联度，建立了清洗系统的模糊控制模型。实验结果表明，所设计的模糊控制模型能自动控制风机转速、导板倾角等清选段参数，在一定程度上降低了谷物筛分损失。
The main working parts of the cleaning device of a rice combine harvester can be controlled by an established control strategy in real time based on the monitored grain sieve loss. This is an efficient way to improve their cleaning adaptability, since as a consequence, the main working parameters of combine harvesters can automatically adapt to crop and environment changes, and the corresponding cleaning performance can be improved. To achieve the target of cleaning control based on the monitored grain sieve loss, a fuzzy control system was developed, which selected S7-1200 PLC as the main control unit to build the lower computer hardware system, utilized ladder language to complete the system compilation, and used LabVIEW 14.0 software to design the host–computer interface. The effects of fan speed, guide plate angle, and sieve opening on the grain sieve loss and grain impurity ratio have been investigated through a large number of bench tests. The relevance level of the operating parameters on the performance parameters has been determined also, and finally, a fuzzy control model was developed for the cleaning system. The experiment results indicated that the designed fuzzy control model can control the cleaning section settings, such as fan speed and guide plate angle automatically, and reduce the grain sieve loss to some extent.