阵列压电叠堆驱动高速开关阀的设计与仿真分析  

Design and Simulation Analysis of a High Speed On/Off Valve Actuated by Array Piezoelectric Stacks

作　　者：高强[1] 朱勇[1] 钱鹏飞[2] 张兵[2] 王杰[1] GAO Qiang;ZHU Yong;QIAN Peng-fei;ZHANG Bing;WANG Jie(National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013;School of Mechanical Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]江苏大学机械工程学院,江苏镇江212013

出　　处：《液压与气动》2023年第9期56-62,共7页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52205058);江苏省高等学校自然科学研究面上项目(22KJB460017)。

摘　　要：针对目前高速开关阀采用PWM控制信号产生诸如高频流量脉动、振动与噪声等问题,基于并联液阻和二级制编码技术设计一种阵列压电叠堆驱动的高速开关阀。阵列压电叠堆的轴向长度呈二进制编码排列,故采用PCM(脉码调制)信号来控制每个压电叠堆的工作状态进而实现阀口开度的离散化调节。其次,基于MATLAB/Simulink建立高速开关阀数学模型,并通过仿真揭示了流量瞬态不确定产生机理。最后,提出一种基于模型的PCM编码控制策略,阶跃跟踪结果表明:流量跟踪无超调,且稳态误差在0.015 L/min以内;正弦跟踪结果表明:当阵列压电叠堆的开启和关闭动态特性不对称时,最大误差增加至0.61 L/min,但平均误差和误差标准差的变化范围仅在0.004 L/min和0.013 L/min以内。Aiming at the problems such as high-frequency flow fluctuation,vibration and noise,caused by the current high speed on/off valve(HSV) driven by PWM control signal,a HSV actuated by array piezoelectric stacks is designed based on the parallel hydraulic resistance and binary coding technology.Considering that the axial lengths of the array piezoelectric stacks are arranged in binary code,so each piezoelectric stack can be driven by PCM(Pulse Code Modulation) signal to realize the discretized control of the valve opening.Moreover,the mathematical model of the HSV is established by MATLAB/Simulink,and the flow transient uncertainty is revealed by simulation.Finally,a model-based PCM coding flow control strategy is proposed.The step tracking results show that there is no overshoot,and the steady-state errors are within 0.015 L/min.The sine tracking results indicate that when the opening and closing dynamic characteristics of the array piezoelectric stacks are asymmetrical,the maximum error increases to 0.61 L/min,but the variation ranges of the average error and error's standard deviation are only within 0.004 L/min,and 0.013 L/min.

关 键 词：阵列压电叠堆 高速开关阀 二进制编码 流量瞬态不确定性 流量控制策略 

分 类 号：TH137[机械工程—机械制造及自动化] TP211[自动化与计算机技术—检测技术与自动化装置]