摘要
设计了拖拉机线控液压转向试验台的电液加载系统,通过控制电液比例溢流阀,使加载力实现成比例、连续的变化。并搭建了转向阻力电液模拟加载试验台,测试了拖拉机在恒定、阶跃和正弦3种转向阻力方式、不同工况下转向时轮胎受到的侧向阻力。试验结果表明,所设计的电液加载系统具有良好的响应特性和跟随性,系统稳态误差不超过3.1%,可满足拖拉机线控液压转向系统的实验要求。
An electronic-hydraulic loading system is designed based on tractor＇s hydraulic steering by-wire test-bed, Electronic-hydraulic proportional relief valve is controlled to make loading force proportional and continuous variable. Steering resistance loading test-bed is built to test three kinds of steering resistance including constant style, step style and sine style. Tire lateral resistance is also tested under different working conditions. As the result shows, the electronic-hydraulic loading system has the ability of high stability and following performance. Besides that, system＇s steady state error is lower than 3.1%, and it meets the test requirement of tractor＇s hydraulic steering by-wire.
出处
《中国农机化学报》
北大核心
2014年第3期124-129,共6页
Journal of Chinese Agricultural Mechanization
基金
江苏省科技成果转化专项资金项目(BA2010055)--全架式大功率轮式拖拉机研发及产业化
江苏省科技支撑计划(农业)资助项目(BE2012384)--拖拉机自动耕深控制装置的研究与开发
关键词
拖拉机
线控液压转向
加载系统
电液比例溢流阀
台架试验
tractor
hydraulic steering by-wire
loading system
electronic-hydraulic proportional relief valve
bench test
