基于AMESim的数字缸建模与仿真

Modeling and simulation of digital hydraulic cylinder based on AMEsim

本文简述了数字缸的工作原理,利用AMESim建立该液压系统的整体仿真模型,研究对系统动态特性影响的因素。通过仿真实验,得出不同负载、遮盖量和输入信号等因素对系统动态性的影响。仿真结果表明:负载对数字缸的位移和速度的影响不大;阀芯遮盖量为正时,响应速度快,但是泄露量大,影响系统精度;阀芯遮盖量为零时,响应速度快,泄露量小,但很难实现;阀芯遮盖量为负时,响应速度慢,实现比较容易;输入信号的频率越大,数字缸的速度越快,但正弦跟踪误差也越大。得出结论:根据负载合理选择数字液压缸型号;输入信号的频率和幅值要根据实际情况合理选用,减小数字液压缸的跟踪误差,保证稳定性和准确性;遮盖量尽量选择较小的负遮盖量,减少系统发热,提高能源利用率。

This article briefly describes the working principle of the digital cylinder,uses AMESim to establish the overall simulation model of the hydraulic system,and studies the factors that affect the dynamic characteristics of the system.Through simulation experiments,the effects of factors such as different loads,covering amounts,and input signals on system dynamics are obtained.Simulation results show that the load has little effect on the displacement and speed of the digital cylinder.When the spool cover is positive,the response speed is fast,but the leakage is large,which affects the system accuracy.When the spool cover is zero,the response speed is fast,the leakage is small,but it is difficult to achieve.When the spool cover is negative,the response speed is slow,and it is easy to realize.The greater the frequency of the input signal,the faster the speed of the digital cylinder,but the larger the sinusoidal tracking error.It is concluded that the digital hydraulic cylinder model is reasonably selected according to the load.The frequency and amplitude of the input signal should be reasonably selected according to the actual situation,reduce the tracking error of the digital hydraulic cylinder,and ensure stability and accuracy.As far as possible,choose a smaller negative covering amount to reduce system heating and improve energy efficiency.