摘要
压电堆执行器的位移影响着喷油器的针阀开闭性能,通过试验发现压电堆执行器的位移波动位置,分析了引起位移波动的因素.运用ABAQUS有限元软件建立了压电堆执行器的仿真模型,分析了压电堆执行器在不同时间下的位移变化,说明了压电元件的惯性是压电堆执行器在膨胀和收缩阶段产生位移波动的原因,提出了液压吸振和电压优化的方法减小压电堆执行器的位移波动.测试试验结果表明选择合适的耦合腔容积只能一定程度上减少位移波动,梯形电流控制方法可明显减小位移波动.
Affecting the performance of needle opening-close in fuel injector,the displacement of piezoelectric multilayer stack actuator (PMSA) was analyzed by test measurement to find the position of displacement wavelet,and some factors causing the displacement wavelet of PMSA were analyzed.Firstly,a simulation model was established for the PMSA based on ABAQUS software to analyze the displacement change of PMSA in different time.Results show that the piezoelectric component inertia is the main reason causing displacement wavelet of PMSA in the expansion and contractive stage.Then a hydraulic vibration absorption method and a voltage optimization method were presented to decrease the displacement wavelet of PMSA.Experimental results show that hydraulic coupling displacement amplifier can reduce the displacement wavelet to a certain extent,and trapezium current control can effetely reduce displacement wavelet of PMSA.
作者
王军
熊庆辉
金毅
张幽彤
WANG Jun;XIONG Qing-hui;JIN Yi;ZHANG You-tong(Department of Mechanical Engineering,Academy of Armored Forces Engineering,Beijing 100072,China;KeyLaboratory of Vehicle Transmission,China North Vehicle Research Institute,Beijing 100072,China;School ofMechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2019年第3期248-254,共7页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(51305457)
关键词
喷油器
压电执行器
位移
fuel injector
piezoelectric actuator
displacement
