液粘调速离合器液压系统压力控制策略  

Research on pressure control strategy of hydraulic system of hydro-viscous variable speed clutch

作　　者：秦永峰 龚国芳[1] 王飞[1] 孙辰晨[1] QIN Yongfeng;GONG Guofang;WANG Fei;SUN Chenchen(State Key Lab of Fluid Power Transmition and Control, Zhejiang University, Hangzhou 310027, China)

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《哈尔滨工程大学学报》2020年第9期1377-1383,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2017YFB1302602,2017YFB1302604);国家重点基础研究发展项目(2015CB058100);国家自然科学基金项目(51675472);河南省重大科技专项项目(161100211100).

摘　　要：针对电液比例溢流阀存在最小调节压力,难以满足液粘调速离合器液压系统的低压工况需求的问题,本文提出了变转速液压泵与电液比例溢流阀联合控制的压力控制策略。分析了泵阀联合控制系统模型,在低压时采用泵控,高压时采用阀控,中间采用逻辑硬切换;列写控制油腔流量连续性方程,以流量和压力作为反馈进行压力控制,设计液压泵的滑模控制器,采用Lyapunov稳定性理论证明所设计的滑模控制系统的稳定性;搭建液粘调速离合器测试实验台,比较PID和滑模控制算法对液压泵的压力控制效果。实验结果表明:基于液压泵与电液比例溢流阀协同作用的控制策略可以扩大压力调节范围;相对于PID,滑模控制具有很好的鲁棒性,并且可以提高压力控制精度。Given that the electrohydraulic proportional relief valve has a minimum regulating pressure,it is difficult to meet the lower pressure working condition requirement of the hydraulic system of the hydro-viscous variable speed clutch.To solve this problem,this paper proposes a pressure control strategy for the combined control of the variable speed hydraulic pump and the electrohydraulic proportional relief valve.The model of the pump and valve combined control system is analyzed.Pump control is used at low pressure,valve control is used at high pressure,and a logic hard handoff is used at ordinary pressure.The continuity equation of oil chamber control is presented;the flowrate and pressure are used as feedback for pressure control.The sliding mode controller of the hydraulic pump is designed,and the stability of the designed sliding mode control system is proved by the Lyapunov stability theory.The hydro-viscous variable speed clutch test bench is built;the pressure control effect of the PID and sliding mode control algorithms on the hydraulic pump are compared.The experimental results show that the control strategy based on the combination of the hydraulic pump and the electrohydraulic proportional relief valve can expand the pressure regulating range.Compared with the PID control,the sliding mode control has good robustness and can improve the pressure control precision.

关 键 词：液粘调速离合器 压力控制 泵阀联合 滑模控制 PID控制 液压系统 抖振 TBM脱困 

分 类 号：TH137.52[机械工程—机械制造及自动化] TH133.4