比例阀放大板作为电液比例阀的配套控制设备,能够驱动阀芯运动,同时采集阀芯位置反馈,形成控制闭环。为探究一种新的比例阀放大板测试技术,采用NI-PXI平台和LabVIEW软件,对比例阀进行了硬件在环仿真。在PXI实时系统环境下,采集比例阀放大板驱动信号,搭建比例阀传递函数模型,通过模拟阀芯位置传感器将计算结果反馈至比例阀放大板。结果表明采用硬件在环仿真方法,可在一定程度上用比例阀硬件在环仿真模型替代实际比例阀,完成与放大板组成的闭环控制。
Abstract
As a control equipment of electrohydraulic proportional valve, the proportional valve amplifier can drive the spool of electrohydraulic proportional valve and collect the spool feedback to form a closed-loop control. By a hardware-in-the-loop simulation of Rexroth electrohydraulic proportional valve, a new proportional valve amplifier test method based on the NI-PXI platform and the software LabVIEW, is introduced to collect drive singles, build up transfer function model and simulate spool displacement feedback to the amplifier. The results show that the method is able to replace the Rexroth proportional valve to complete closed-loop control with Rexroth proportional valve amplifier to some extent.
关键词
电液比例阀 ;
放大板 ;
硬件在环仿真 ;
LabVIEW
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Key words
electrohydraulic proportional valve ;
amplifier ;
hardware-in-the-loop simulation ;
LabVIEW
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