【作者】 邹翔；

【导师】 李国平；

【作者基本信息】 宁波大学 ， 机械电子工程， 2009， 硕士

【摘要】 本文结合宁波市教育局资助项目(编号Jd060440)、浙江省自然科学基金资助项目(Y107792)设计开发了一种基于压电陶瓷执行器的车削振动控制系统,旨在提高车床切削的加工精度。该系统由压电陶瓷执行器、专用刀架、主控计算机、测量电路以及高精度测振传感器组成。本文设计了基于模糊自适应的PID控制器并应用于车削振动控制系统。系统的仿真与实验结果证明该系统能够有效地减小振动幅度,具有一定理论与应用价值。全文内容简述如下:第一章首先介绍了课题的研究背景,接着对车削振动控制的实现方法做了分析,然后着重论述了当前国内外车削振动控制的研究现状。第二章简要介绍了压电陶瓷执行器工作机理和特点,然后对其进行了静态与动态特性的测试与分析,同时也分析了执行器测试结果对后面设计的影响。第三章首先阐述了车削振动控制系统的总体方案,然后主要对柔性铰链和专用刀架的理论和三维设计进行了详实的研究,并对设计结果用有限元软件加以优化。第四章对系统的硬件部分作了详细的设计分析。硬件电路的内容主要有电源设计、测量电路搭建、I/O接口设计、测量元器件的选择等。对各电路的设计步骤进行了详细的推导与论述。第五章是车削振动控制系统的Simulink仿真。本章首先建立了控制系统各个组成部分的传递函数,然后设计了PID控制器和模糊自适应PID控制器的Simulink仿真模型,并且通过对比PID控制器和模糊自适应PID仿真结果说明了模糊自适应PID控制器的优越性。第六章是车削振动控制系统的人机界面设计和现场实验。本章首先阐述了控制系统人机界面的总体设计界面,然后具体给出了控制算法程序图,最后在不同转速和切削厚度条件下进行车削振动控制实验,实验结果表明本文设计的车削振动控制系统能够有效地减少车刀的振动量。最后本文对课题研究作了总结,并对未来的研究工作进行了展望。更多还原

【Abstract】 A turning vibration control system based on the Piezoelectric Actuator (PZT) is designed in this paper to improve the turning process precision. It is composed of the PZT, the Special Tool-post, the computer and vibration-test sensor. The feedback algorithm of Fuzzy Logic Controller is applied in this system. The simulated data and testing result demonstrate that the system reaches anticipative goal. The content is introduced as follow:In chapter 1, based on the introduction of the research background, the turning vibration control system is proposed. Then the development-trend and current research situation of the turning vibrating controlling system are introduced ,and the study contents of this dissertation are proposed.In chapter 2, the working mechanism and characteristics of Piezoelectric Actuator are briefly introduced, and static and dynamic characteristic of the PZT is tested. Then the paper also analyzes how the test results of actuator influences the following design of .the turning vibration control systemIn chapter 3, the overall design of the turning vibration control system is proposed firstly, and then the design of the flexible hinge structure and its special tool-post is discussed with Pro/Engineer Wildfire 3.0. And the flexible hinge structure and its special tool-post are verified in this chapter with the finite element (FEA) software.In chapter 4, the hardware of the system is designed, particularly including power supply, test circuit, I/O interface circuit and choice of the test circuit components. The circuit design principles and procedures are derived and discussed in detail.In chapter 5, the simulation research of the system is developed. The transfer function of this system is established firstly. And then a PID controller and adaptive fuzzy PID controller are design. Comparing with the PID controller, the results demonstrate that the adaptive fuzzy PID has a large advantage to apply in turning vibration control system.In chapter 6, the software of the system is designed, including the control algorithm based on adaptive fuzzy PID system, the operational interface.In the last chapter, the study contents and conclusions of this dissertation have been summarized, and the further research works have been forecast.更多还原