农机化研究2024，Vol.46Issue(2)：242-248,7.
拖拉机三点悬挂电液加载系统研究与试验
Research and Test of Tractor's Three-point Suspension Electro-hydraulic Loading System
摘要
Abstract
The three-point hitch system is one of the key working systems of the tractor.Due to the complex and change-able working conditions in the field,the three-point hitch hydraulic system of the tractor bears a large random load,which is prone to problems such as parts damage and hydraulic failure,which directly affects the safety of the tractor.and work efficiency.Based on the above problems,the tractor three-point suspension electro-hydraulic loading system was designed and developed,and the tractor loading platform measurement and control instrument and the host computer measurement and control software were developed based on NI Compact-RIO to realize signal acquisition and loading con-trol.The ARMAX model is used for system identification,and the electro-hydraulic system model is obtained.Compared with the Matlab transfer function identification box,the average absolute error is reduced by 33.90%,the mean square error is reduced by 87.36%,and the root mean square error is reduced by 64.45%;based on the PID control method,the upper The machine applied the ladder signal,sinusoidal signal and three-point suspension traction load to the loading system at a loading frequency of 20 Hz for reproduction,and the reproduction effect can fully meet the control loading re-quirements of the test bench.The test results show that the system identification based on ARMAX model,the control method based on PID and the three-point hitch electro-hydraulic loading system can reproduce the traction load of the three-point hitch in the field.System reliability test provides platform and method support.关键词
拖拉机/电液加载系统/三点悬挂/系统辨识/ARMAX模型/PID控制算法Key words
tractor/electro-hydraulic loading system/three-point hitch/system identification/ARMAX model/PID control algorithm分类
农业科技引用本文复制引用
宗建华,王玲,吕东晓,张旗,王书茂..拖拉机三点悬挂电液加载系统研究与试验[J].农机化研究,2024,46(2):242-248,7.基金项目
国家自然科学基金项目(31801783) （31801783）
