基于超磁致伸缩致动器的流量控制阀的设计与研究

发布时间：2018-05-03 07:03

本文选题：超磁致伸缩致动器 + 微流量阀　；参考：《武汉理工大学》2011年硕士论文

【摘要】：生物基因工程、新型药物研制和航空航天等技术的发展,提高了人们对各种微成分的用量精确控制的要求,传统的流量控制技术已逐渐不能满足需要,从而促进了对微流体控制技术的研究并因此取得了大量的研究成果。利用智能材料,各种流体控制器件被开发出来,其中,超磁致伸缩材料(GMM)具有应变大、精度高、响应快等特点,在应用方面有一定的优势。论文以本实验室开发的超磁致驱动器(GMA)实验平台为基础,在流量阀的结构设计、性能分析、建模与控制等方面展开了理论和实验研究,为超磁致精密流量阀的进一步开发和研究提供基础。论文以流量阀的产生和发展为背景,总结了各种智能材料在流量调节领域的应用现状,包括智能凝胶、磁流变液、压电材料和超磁致伸缩材料；着重阐述了超磁致流量阀的应用基础,研究现状和课题来源,为后面基于GMA的流量阀设计,仿真和实验提供必要基础。流量阀的开发设计包括驱动方式设计,密封设计和总体结构设计等。目前的研究集中在伺服阀和直动式开关阀,论文根据实际需要,将GMA与阀芯结合,提出了反向驱动的流量调节方式,以此为基础,设计了密封方案,球阀结构和整体连接方案,加工了实物,实验表明,该阀密封和调节性能良好,响应快,满足实验要求。微位移放大机构是GMA与流量阀连接的核心部件,论文研究了柔性铰链的性能特性,推导了其刚度计算公式,设计了具有较大反向位移输出的微位移机构。借助有限元分析方法,研究了其静力学特性。分析和实验表明,该机构有一定的反向放大效果,可以用于流量调节。基于对柔性铰链的理解,设计并加工了不同形式的微夹钳,拓宽了GMA的应用领域。通过理论分析,建立了阀的流量模型,并进行了数值模拟,比较了理论曲线和仿真曲线,得到了相关结论。针对存在的问题,进行了GMA输出实验,微位移放大机构实验和流量实验,初步探讨了BP神经网络的预测控制,验证了流量的微调节效果。
[Abstract]:With the development of biological genetic engineering, new drug development and aerospace technology, the requirement of accurate control of the amount of various micro-components has been raised, and the traditional flow control technology has gradually failed to meet the needs. Thus, the research on micro-fluid control technology has been promoted and a lot of research results have been obtained. A variety of fluid control devices have been developed using smart materials, among which the giant magnetostrictive material (GMMM) has the advantages of large strain, high precision, fast response and so on. Based on the GMA experimental platform developed by our laboratory, the theoretical and experimental research on the structure design, performance analysis, modeling and control of the flow valve is carried out in this paper. It provides the basis for the further development and research of the Giant Magnetoelectric Precision flow Valve. Based on the generation and development of flow valves, this paper summarizes the applications of various intelligent materials in the field of flow regulation, including smart gels, magnetorheological fluids, piezoelectric materials and giant magnetostrictive materials. The application basis, research status and subject source of Giant Magnetogenic flow Valve (GMSFV) are described in this paper, which provides a necessary basis for the design, simulation and experiment of GMSF valve based on GMA. The development and design of flow valve include drive design, seal design and overall structure design. The current research focuses on servo valve and direct-acting switch valve. According to the actual needs, the paper combines GMA with valve core, and puts forward the flow regulation mode of reverse drive. Based on this, the sealing scheme, the structure of ball valve and the whole connection scheme are designed. The experimental results show that the valve has good sealing and adjusting performance, quick response and meets the requirements of the experiment. The micro-displacement amplification mechanism is the core part of the connection between the GMA and the flow valve. The performance characteristics of the flexure hinge are studied, the stiffness calculation formula is derived, and the micro-displacement mechanism with large reverse displacement output is designed. With the help of finite element analysis method, the statics characteristics are studied. The analysis and experiment show that the mechanism has certain reverse amplification effect and can be used for flow regulation. Based on the understanding of flexure hinge, different kinds of micro clamp are designed and manufactured, which widens the application field of GMA. Through theoretical analysis, the flow model of the valve is established, and the numerical simulation is carried out. The theoretical curve and the simulation curve are compared, and the relevant conclusions are obtained. Aiming at the existing problems, GMA output experiment, micro-displacement amplification mechanism experiment and flow experiment are carried out. The predictive control of BP neural network is discussed preliminarily, and the effect of micro-regulation of flow rate is verified.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH134

【引证文献】