联合收获机脱粒系统动力学模型及调速控制仿真与试验

针对目前联合收获机脱粒调速控制系统仿真设计中所采用的功耗模型的建立仅考虑了单个滚筒的运动状态,并没有考虑到其他工作部件运动对脱粒滚筒转速变化的影响,以及脱出物中杂余含量的影响,因此有必要对联合收获机脱粒系统动力学模型做进一步的研究。该文以XG610型联合收获机为例,在对运动机构进行较为全面的动力学分析和脱粒分离试验数据的基础上,建立了脱粒系统动力学模型,并与模糊逻辑控制器相结合构建了调速控制系统仿真模型。计算机仿真结果显示,当作物密度由0.95增加到1.09 kg/m2,喂入量增加约15%时,调速系统能够在5 s内做出有效调节,避免滚筒出现过载或堵塞现象。田间试验记录数据也验证了当喂入量增加约...

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Bibliographic Details
Published in农业工程学报 Vol. 31; no. 21; pp. 25 - 34
Main Author 宁小波 陈进 李耀明 王坤 王一帆 王学磊
Format Journal Article
LanguageChinese
Published 巢湖学院机械与电子工程学院，合肥 238000%江苏大学机械工程学院,镇江,212013%江苏大学现代农业装备与技术教育部重点实验室,镇江,212013 2015
江苏大学机械工程学院，镇江 212013
Subjects
动力学模型
机械化
联合收获机
脱粒系统
计算机仿真
调速控制
机械化
combine harvester
threshing system
speed control
调速控制
kinetic model
脱粒系统
computer simulation
联合收获机
动力学模型
mechanization
计算机仿真
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2015.21.004

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Summary:针对目前联合收获机脱粒调速控制系统仿真设计中所采用的功耗模型的建立仅考虑了单个滚筒的运动状态,并没有考虑到其他工作部件运动对脱粒滚筒转速变化的影响,以及脱出物中杂余含量的影响,因此有必要对联合收获机脱粒系统动力学模型做进一步的研究。该文以XG610型联合收获机为例,在对运动机构进行较为全面的动力学分析和脱粒分离试验数据的基础上,建立了脱粒系统动力学模型,并与模糊逻辑控制器相结合构建了调速控制系统仿真模型。计算机仿真结果显示,当作物密度由0.95增加到1.09 kg/m2,喂入量增加约15%时,调速系统能够在5 s内做出有效调节,避免滚筒出现过载或堵塞现象。田间试验记录数据也验证了当喂入量增加约15%时,前进速度与滚筒转速在5 s内均能有效调节至稳定状态,总体变化趋势与仿真结果相符,验证了所建立的脱粒系统动力学模型的合理性与可行性。该研究为脱粒调速控制系统的仿真设计及后续控制算法的优化提供了参考。
Bibliography:11-2047/S
At present, only movement state of single threshing rotor is considered for threshing system power model in simulation design of speed control system for combine harvester, and movement states of other work parts and impurity quantity in threshed materials are not considered, so it is necessary to make further study on theoretical model of threshing system in order to improve simulation design of speed control system and subsequent optimization of control algorithm. In this paper, 3 fundamental hypotheses were made as follows： 1） Crop was fed continuously and evenly into the threshing system and crop moisture was not taken into account; 2） Crop flowing was constant and continuous in threshing space, and there was no relative sliding between crop layers; 3） The threshed materials were separated from concave, the speed of which was equal to the peripheral speed of threshing rotors. And taking the XG610 combine harvester as example, the kinetic model for threshing system was established based on kinetic
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2015.21.004