摘要
针对目前国产水稻联合收获机割台参数调整依赖于经验手工调节、操控不方便等问题,该文设计了水稻联合收获机割台参数按键调节装置,提出了拨禾轮转速自动控制方法,建立拨禾轮转速自动控制模型,结合模糊PID控制算法实现拨禾轮转速自动控制。割台参数按键调节装置由传感器、PLC控制单元、显示器、按键、驱动等模块构成。PLC接收按键信息发送控制信号驱动割台部件电动调节,传感器将检测信号送入PLC,由显示器实时显示调整情况。测试结果表明,通过割台参数按键调节装置能实现割台高度、拨禾轮高度、前后位置及转速参数的自动调节,调节相对误差分别为7.4%、3.4%、2.0%和7.8%;作业速度相对误差为3.4%;拨禾轮转速自动控制响应时间≤0.8 s,调整时间≤1.7 s,最大相对误差8.5%,控制精度达到91.5%,基本满足水稻收获机割台参数调节要求,可为水稻联合收获机智能操控提供技术支撑。
The degree of automation of domestic combine harvester is low,and the operation is complex,it is difficult for workers to understand the actual adjustment of working parts.Crop height,crop length,height of the ground and the lack of consistency in course of project led to the continuous adjustment of harvester's joystick.The traditional operation method,in which experiences are excessively relied on,cannot meet the requirements of automatic operation of domestic-made combine harvester.The current operation method is an obstacle to the development of the automatic control of the combine harvester.In this paper,a device of adjusting combine harvester header parameters was designed.The header parameters include height of header,height of reel,position of reel and speed of reel.The control function of header parameters adjusting device is to adjust height of header,height of reel,position and speed of reel.The header parameter adjusting device was composed of sensor modules,PLC control units,display modules,key module,header drive parts module and so on.The sensor modules were used to detect the parameter of header which include height of header,height of reel,position of reel,speed of reel and forward speed.Sensor modules detect the signal inputed into PLC control unit.PLC control unit is the core component of the adjusting device.PLC performs data operation and processing.Using touch display screen as human-computer interaction tools,which communicates with PLC.The display interface includes parameters displaying and setting,and displayed parameters include header parameter,operating speed,crop height and so on.The key module adopts self-reset and self-locking switch to realize manual and automatic function signal input.At the same time,PLC receives the key information and make judgments,and then sends the control signal to drive header hydraulic system to carry out the movement of the mechanism.Header drive parts modules include lectromagnetic directional valve and proportional solenoid valve,which adopts the hydr
作者
陈进
汪树青
练毅
Chen Jin;Wang Shuqing;Lian Yi(Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2018年第16期19-26,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家重点研发计划重点专项(2016YFD0702001)
江苏省重点研发计划(BE2017358)
镇江市重点研发计划(NY2016016)
关键词
农业机械
设计
试验
按键电控调节
拨禾轮
agricultural machinery
design
experiments
keys electric control adjusting
reel
