【作者】 吕猛；

【导师】 魏燕定；

【作者基本信息】 浙江大学 ， 机械制造及其自动化， 2004， 硕士

【摘要】 本论文对超磁致伸缩驱动器(GMA)在主动隔振系统中的应用进行了系统的理论分析和实验研究，旨在采用超磁致伸缩驱动器作为主动隔振系统中的执行机构抑制隔振平台的振动，以提高隔振平台的隔振精度。 绪论从主动隔振技术及其工程背景和超磁致伸缩驱动器的应用研究概况着手，对它们的背景、应用和发展等作了较为详细的论述，着重介绍主动隔振技术及控制规律和智能材料在其中的应用，对超磁致伸缩驱动器的发展概况、优点及其应用现状也作了较为详细的叙述。 第二章介绍精密隔振平台的设计及设计原理，详细论述超磁致伸缩驱动器的设计，包括：磁致伸缩现象、Terfenol—D的基本特性、空心交流电磁路的设计、偏置磁场以及预压弹簧的设计。 第三章建立主动隔振系统的模型，首先对隔振平台进行理论建模；其次，从本构方程导出超磁致伸缩驱动器的数学模型，并考虑温度对Terfenol—D棒应变的影响；最后从宏观角度介绍整个测控系统，分别详细说明系统的硬件构成和软件构成，重点介绍驱动器的功率放大电路设计和主动隔振测控软件的模块化设计。 第四章为主动隔振试验与仿真研究，首先介绍了PID控制算法在主动隔振中的应用；在主动隔振试验中利用PID建模技术对所建识别模型进行离线识别，然后考察不同外扰频率下的隔振效果；再次对外扰力为单频、双频、噪声信号的情况下对系统进行数值仿真。 第五章对超磁致伸缩驱动器的特性进行测试，通过试验数据研究了驱动器的静态特性、频响特性、滞回特性与磁滞模型以及动态阶跃响应。 最后，概况本论文的主要工作、得出相关结论并对本课题下一步的发展提出了自己的意见。更多还原

【Abstract】 The theory analysis and experiment research of active isolation system based on Giant Magnetostrictive Actuator (GMA) are discussed in this dissertation. The main purpose of the research is to improve the vibration controlling precision of vibration isolation platform by means of Giant Magnetostrictive Actuator as the active vibration control element.In the preface we begin with the engineering background of active isolation technology and GMA, of which the research, use and development are stated in detail, especially the control rule and AI material used in active isolation system, practical use and advantage of them.In chapter 2 design and principle of the precision active isolation platform are discussed. Design of GMA is discussed in detail and it consists of magnetostrictive phenomenon, basic characteristics of Terfenol-D, design of hollow AC electro-magnetism circuit, design of the Bias Magnetic Field and precompression spring.In chapter 3 model of active isolation system is constructed. Firstly, theoretical model of the isolation platform is constructed. Secondly, mathematical model of the GMA is inferred from constitutive equation and the temperature influence to the strain of Terfenol-D is considered. At last the whole measurement and control system is introduced in this dissertation. The software element and the hardware element are discussed in detail especially. Special emphasis is put on the design of the power amplifier and modularization design of the measurement and control system software.Chapter 4 mainly include active isolation experiment and simulation research. The use of PID control algorithm in active isolation system is discussed firstly. We identify the constructed model offline by means of PID modeling technology in the active isolation experiment, then the isolation result leading from different disturb frequency is reviewed. Secondly, numerical simulation is carried out according to the disturb signal of single frequency, double frequency and noise.The characteristics of GMA include static, frequency response, hysteresis and hysteresis model, dynamic step response is tested in chapter 5.At last main achievements of this dissertation are summarized and the further research work, which will be done in the near future is put forward.更多还原