摘要
为提高液压机械传动装置(HMT)模式切换过程稳定性,提出了一种HMT模式切换滚动协调控制方法。该方法通过对HMT模式切换原理分析和切换过程模型建立,制定了基于模型预测控制的模式切换机构转矩和液压调速系统排量比调节的滚动协调控制策略;以减小HMT输出转速误差和车辆冲击度为目标,设计了具有状态约束的滚动协调控制器。仿真和试验结果表明,与未采用滚动协调控制方法相比,该方法可减小模式切换过程输出转矩、转速波动,动载荷降低32.9%,冲击度减小37.31%,模式切换时间减少0.28 s,且排量比调节使得模式切换前后稳定输出转速基本保持一致,对模式切换过程有较好的控制效果,切换品质得到较大提高。研究结果对液压机械传动装置的实际工程应用具有一定的参考价值。
To improve the stability of the mode switching process of the hydro-mechanical transmission(HMT),an HMT mode switching scroll coordinated control method is proposed.By analyzing the principle of HMT mode switching and establishing the switching process model,this method formulates a rolling coordinated control strategy based on model predictive control(MPC)for the torque of the mode switching mechanism and the displacement ratio adjustment of the hydraulic speed control system.Taking reducing the HMT output speed error and vehicle impact as the goal,a rolling coordinated controller with state constraints was designed.Simulation and test results show that,compared with the non-rolling coordinated control method,this method can reduce the output torque and speed fluctuation during the mode switching process;the dynamic load is reduced by 32.9%,the impact degree is reduced by 37.31%,and the mode switching time is reduced by 0.28 s.The displacement ratio adjustment makes the output speed basically consistent before and after the mode switching,which has a better control effect on the mode switching process and can greatly improve the switching quality.The research results provide a reference for the practical application of hydro-mechanical transmission device.
作者
曹付义
王越航
冯琦
徐立友
CAO Fuyi;WANG Yuehang;FENG Qi;XU Liyou(School of Vehicle and Traffic Engineering, Henan University of Science and Technology, Luoyang, Henan 471003, China;Henan Province Collaborative Innovation Center for Advanced Manufacturing of Mechanical Equipment, Henan University of Science and Technology, Luoyang, Henan 471003, China;State Key Laboratory of Tractor Power System, Henan University of Science and Technology, Luoyang, Henan 471039, China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2021年第3期136-144,共9页
Journal of Xi'an Jiaotong University
基金
国家重点研发计划资助项目(2016YFD0701002-2)
河南省重点科技攻关计划资助项目(172102210252)。
关键词
液压机械传动
模式切换
模型预测
滚动协调控制
hydro-mechanical transmission
mode switching
model prediction
rolling coordinated control
