农业机械学报2017，Vol.48Issue(8)：343-349,7.DOI:10.6041/j.issn.1000-1298.2017.08.041
基于轮缸PV特性的电磁阀线性增压控制
Linear Pressure Control of Solenoid Valve Based on PV Characteristics of Wheel Cylinder
摘要
Abstract
The precision of linear pressure control of solenoid valve,which affects the response precision of hydraulic control in regenerative braking system,is related to the control characteristics of solenoid valve and PV characteristics of wheel cylinder.The control method of linear pressure control of solenoid valve based on PV characteristics of wheel cylinder was proposed.The working principle of the solenoid valve was analyzed,and the demand of control precision of the solenoid valve was given.By analyzing the control mechanism of the solenoid valve,it was pointed out that the linear pressure control of solenoid valve had a linear control range,and it can be also realized by increasing the coil current.By analyzing the PV characteristics of the wheel cylinder,it was pointed out that the wheel cylinder had nonlinear characteristics in low pressure region and approximate linear characteristics in high pressure region.The characteristics of the wheel cylinder pressure changing rate at different current changing rates were analyzed,and the linear pressure control algorithms of the low pressure region and the high pressure region were proposed respectively.dSPACE platform was used to build hardware-in-the-loop test bench,different pressure changing rates of wheel cylinder were tested,which can observe the following results between actual pressure and target pressure.The experimental results showed that the proposed linear pressure control algorithm can satisfy the requirement of the control precision of the solenoid valve,and enrich the linear pressure control theory.关键词
线性增压控制/制动能量回收/轮缸PV特性/电流变化率Key words
linear pressure control/braking energy recovery/PV characteristics of wheel cylinder/current changing rate分类
交通工程引用本文复制引用
孙成伟,初亮,郭崇,李天骄,张志超..基于轮缸PV特性的电磁阀线性增压控制[J].农业机械学报,2017,48(8):343-349,7.基金项目
国家高技术研究发展计划(863计划)项目(2012AA110903)、吉林省产业技术创新战略联盟项目(20150309013GX)和吉林大学研究生创新基金项目(2016078) （863计划）
