联合收获机喂入量模糊控制系统研究  

Fuzzy control system for feed quantity of combine harvester

作　　者：尤惠媛[1] 卢文涛[1] 

机构地区：[1]洛阳理工学院机械工程系,河南洛阳471023

出　　处：《西北农林科技大学学报（自然科学版）》2015年第5期229-234,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家自然科学基金项目(61004085);河南省科技攻关项目(122102210545)

摘　　要：【目的】设计喂入量模糊控制系统,为提高联合收获机收获效益提供支撑。【方法】采用油压力传感器检测喂入量,根据滚筒扭矩与行走速度之间的关系,建立喂入量模型。设计模糊控制器并在MATLAB下进行仿真,利用PLC建立模糊控制系统,通过电控静液压系统控制行走速度来调整喂入量,并以新疆-3稻麦联合收获机为试验机型,进行喂入量自动控制田间试验。【结果】基于模糊控制系统调整后的联合收获机损失率小于1.2%,破碎率小于1.0%,损失率和破碎率均与经验丰富的驾驶员手动控制结果基本持平,符合国标要求。在作物密度不均匀的区域进行试验,指令喂入量取2kg/s时计算平均喂入量为2.04kg/s;指令喂入量取3kg/s时计算平均喂入量为3.08kg/s,喂入量能稳定控制在±10%的范围以内。【结论】联合收获机喂入量模糊控制系统稳定可靠,能提高收获效益。【Objective】A fuzzy control system for feed quantity of combine harvester was designed to improve harvest efficiency.【Method】Using oil pressure sensor to detect feed quantity,the feed quantity model was established according to the relationship between walking speed and torque of cylinder.The fuzzy controller was designed and simulated with MATLAB.The fuzzy control system was established based on PLC.Feed quantity was adjusted by using electronic control hydrostatic system to control the walking speed.Feed quantity automatic control test in the field was carried out using Xinjiang-3combine harvester as experimental prototype.【Result】The total loss rate and broken rate of adjusted combine harvester based on fuzzy control system were less than 1.2%and 1.0%,which were basically the same as that of harvester controlled by experienced driver and within the national standards.Tested in region with uneven crop density,the computing average feed quantity was 2.04kg/s when taking 2kg/s as instructed feed quantity and it was 3.08kg/s when instructed feed quantity was 3kg/s.The feed quantity was stably controlled in the range of±10%.【Conclusion】The established control system is stable,reliable and effective to improve harvest efficiency.

关 键 词：联合收获机 油压力传感器 喂入量 模糊控制 仿真分析 田间试验 

分 类 号：S[农业科学]