【作者】 刘祥；

【导师】 杨家武； 郭艳玲；

【作者基本信息】 东北林业大学 ， 机械电子工程， 2011， 硕士

【摘要】 随着新型功能材料的飞速发展,超磁致伸缩材料以其伸缩应变大、能量密度高、频带宽、智能响应等独特优势在磁—机转换产品领域显示出了巨大的市场前景。本文所设计的激振器是一种基于超磁致伸缩材料的伸缩效应来完成电能到机械能转换的新型激振器。研究激振器不仅有利用拓展超磁致伸缩材料的应用,而且有助于更好地完成发泡水泥板生产新工艺。本文以发泡水泥板生产工艺对微振平台提出的功能要求为依据,确立微振平台应该达到的性能指标,为实现这些性能指标,从激振器类型的选择、激振方式的确立等诸多方面制定了微振平台的整体方案；同时深入研究了超磁致伸缩材料的仲缩现象、产生机理和工作特性等,为激振器的设计提供重要的初始设计数据和坚实的理论基础。在现有电动式激振器的基本结构的基础上,对激振器的整体结构方案进行了分析和设计。提出了超磁致伸缩棒的几何参数、线圈的几何参数设计与优化、磁回路设计以及预压机构等关键部件的设计方法和理论；对激振器的温升进行了分析,对比了几种常用热变形的补偿方法,并完成了温控系统的设计。简述了有限元分析方法和ANSYS软件,以及与本论文相关的电磁场有限元分析理论。利用ANSYS 10.0对所设计的激振器的磁场分布进行了仿真分析,得到了激振器驱动磁场、偏置磁场的分布情况,这对于激振器的性能研究具有十分重要的指导意义；同时分析还表明：激振器中部磁场分布比较均匀,且磁场强度要小于两端磁场强度,这与超磁致伸缩棒的低导磁率有关。为了定量研究激振器的响应特性,采用集总参建模方法建立了激振器的动静态数学模型,得到了相应的传递函数关系式；并利用MATLAB中的Simulink功能模块进行了动态性能仿真分析,通过分析初步确定了系统的动态响应性能,提出了有效改善动态响应时间和系统稳定性的方法,为进一步研究激振器的智能控制系统提供了理论依据。更多还原

【Abstract】 With the development of the new function materials, ginat mangnetosrictive material have brought out the large maket prospect in the magnetism-machine transition area because of the large flexible strain, high energy density wide frequency band intelligent response and some other special preponderance. Vibration exciter designed is a kind of new exciters, which can change the electric energy into mechanical energy based on flexible effect of ginat mangnetosrictive material. The study of the vibration can not only be good for expanding the use of ginat mangnetosrictive material, but also help complete the new technology of the production of foamed concrete slab.Based on the functional requirement of the micro damping platform raised by the productive technology of foamed concrete slab, this paper confirmed the performance indexes which the micro damping platform should reach. Also it draw up the whole plane from the choice of vibrator types, the establishment of vibration mode and some others aspects. It studied the flexible phenomenon, generating mechanism and performance characteristic of ginat mangnetosrictive material and provided the important design date and theoretical basis for the design of exciter.Based on the existing basic structure of the electrodynamic type exciter, It did the analysis and design of the exciter’s integral structure scheme, raised the design and optimization of the geometric parameters of ginat mangnetosrictive material sticks and coils, magnetic circuit design and the desigen method and theory of the critical components such as preloading institution; It analized the temperature rise of the exciter and finished the temperature control device design based on some usual compensation methods of the thermal deformation.This paper briefly described the finite element analysis, ANSYS software and the related electromagnetic field finite element analysis theory. It did the simulation analysis of the exciter’s magnetic field distribution, and got its distribution of the driven and bias magnetic fields which was so important for the performance study of the exciter. Meanwhile, the analysis showed that, at the middle of the exciter, the magnetic field distributed evenly and is less than the magnetic field intensity each end which is related to the low magnetic permeability. For studying the response characteristic of the exciter quantify cationally, this paper used analsis modeling method to suild the exciter’s static mathematic model and got the corresponding transfer function equation. Also, it used simulink functional module of MATLAB to do dynamic performance simulation analysis, through the analysis. This paper comfirmed prelimirary the system dynamic response performance, and raised the effective method to improve the dynamic response time and system stability, Also it provide the theoretical basis for the farther study of the inlligent control system of the exciter.更多还原