摘要
为提高在纵坡工况下超低重载主动悬挂行驶的安全稳定性,设计出一种升降驱动单元升降控制系统,并分别建立其在理想路面与D级路面的纵坡工况下的数学模型,通过对比升降驱动单元路面跟踪曲线与实际输出位移曲线,验证其在两种路况下的跟踪性能。采用一阶轨迹灵敏度分析方法建立D级路面纵坡工况下升降驱动单元灵敏度方程,给出其位移响应对应的各参数灵敏度,建立灵敏度衡量指标,定量分析各参数变化对输出动态特性影响程度的大小。研究结果表明:液压缸活塞有效面积、液压缸等效总容积、液压油弹性系数、比例伺服阀压力流量系数、液压缸总泄漏系数和最大负载的变化对升降驱动单元输出位移动态性能影响很大,这为后续主动悬挂升降驱动单元性能优化提供理论支持。
In order to improve the safety and stability of the ultra-low heavy load active suspension driving under the longitudinal slope condition,a lifting control system of the lifting drive unit is designed,and its mathematical models under the longitudinal slope condition of the ideal road surface and the Class D road surface are established respectively.By comparing the road tracking curve and the actual output displacement curve of the lifting drive unit,its tracking performance under the two road conditions is verified.The first order trajectory sensitivity analysis method is used to establish the sensitivity equation of the lifting drive unit under the longitudinal slope condition of the D-level pavement,give the corresponding parameter sensitivity of its displacement response,establish the sensitivity measurement index,and quantitatively analyze the extent of the impact of each parameter change on the output dynamic characteristics.The research results show that the effective area of the hydraulic cylinder piston,the equivalent total volume of the hydraulic cylinder,the hydraulic oil elasticity coefficient,the pressure flow coefficient of the proportional servo valve,the total leakage coefficient of the hydraulic cylinder and the change of the maximum load have a great impact on the output displacement dynamic performance of the lifting drive unit,which provides theoretical support for the subsequent performance optimization of the lifting drive unit of the main power suspension.
作者
韩成
康绍鹏
刘凯磊
强红宾
HAN Cheng;KANG Shao-peng;LIU Kai-lei;QIANG Hong-bin(School of Mechanical Engineering,Jiangsu University of Technology,Changzhou,Jiangsu 213001)
出处
《液压与气动》
北大核心
2023年第4期59-70,共12页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金(51805228)
江苏省高等学校自然科学研究项目资助(20KJB580005)
常州市领军型创新人才引进培育项目资助(CQ20210093)
江苏省研究生实践创新计划项目(SJCX21_1305)。
关键词
纵坡工况
主动悬挂
升降驱动单元
轨迹灵敏度
longitudinal slope condition
active suspension
lifting drive unit
track sensitivity
