压电式马达变量控制系统的研究  

Research on Piezoelectric Motor Variable Control System

作　　者：李峙毅 林晓焕[1] 陈勇洁 吕广雷 罗岩 LI Zhiyi;LIN Xiaohuan;CHEN Yongjie;LYU Guanglei;LUO Yan(School of Mechanical and Electrical Engineering,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048

出　　处：《自动化仪表》2022年第3期50-54,共5页Process Automation Instrumentation

基　　金：西安市科技局基金资助项目(GXYD7.9)。

摘　　要：针对现有自然水流发电装置控制系统适应性差、响应频率不足、超调量大、控制精度不足等缺点,引入压电技术,提出一种压电式马达变量控制系统。首先,分析了系统控制原理。对变量马达转速控制系统进行建模分析,得到对应的传递函数。然后,对压电阀控制系统进行分析,建立压电式马达变量控制系统的传递函数。最后,采用Matlab软件,分别对传统马达变量以及压电式马达变量控制系统进行仿真分析并进行对比。结果表明,系统模型设定阻尼比为0.7、刚度为3 N/mm、等效质量为0.0053 kg时,压电式马达变量控制系统具有更加良好的稳定性,且响应速度快、超调量小。该研究可以改善水流发电液压稳频装置的控制性能,在提高能源利用率的同时也拓展了压电技术的应用范畴。Aiming at the disadvantages of poor adaptability,insufficient response frequency,large overshoot,and insufficient control accuracy of the existing control system of natural water flow generation device,a piezoelectric motor variable control system is proposed by introducing piezoelectric technology.Firstly,the control principle of the system is analyzed.The variable motor speed control system is modeled and analyzed to obtain the corresponding transfer function.Then,the piezoelectric valve control system is analyzed to establish the transfer function of the piezoelectric motor variable control system.Finally,Matlab software is used to simulate and compare the traditional motor variable and piezoelectric motor variable control systems respectively.The results show that the damping ratio of the system model is set to 0.7,the stiffness is 3 N/mm,and the equivalent mass is 0.0053 kg.The piezoelectric motor variable control system has better stability,and the response speed is fast,and the overshoot is small.The research can improve the control performance of the hydraulic frequency stabilization device for waterpower generation,improve the energy utilization rate and also expand the application of piezoelectric technology.

关 键 词：水流发电 压电技术 控制系统 压电阀 传递函数 系统模型 MATLAB仿真 控制性能 

分 类 号：TH137.52[机械工程—机械制造及自动化]