基于GMM转换器的两级电液伺服阀的机理研究

发布时间：2018-01-16 04:30

本文关键词：基于GMM转换器的两级电液伺服阀的机理研究　出处：《安徽理工大学》2011年硕士论文　论文类型：学位论文

【摘要】：超磁致伸缩材料(Giant Magnetostrictive Material, GMM)是一种新型的功能材料,具有磁致伸缩应变大、响应速度快、输出力大等优异的性能,使之成为高科技领域的研究热点,其相应的理论及应用研究正日益广泛,各种相关的应用器件正被世界各地的研究者开发出来。论文充分利用超磁致伸缩材料的优异性能,设计了一种阀用电-机转换器(Giant Magnetostrictive Actuator, GMA),并对其进行了静动态理论分析,建立其数学模型进行动态仿真分析,仿真结果显示GMA阶跃上升时间Tr为0.8ms,稳态输出力F为1832N,表明GMA具有响应速度快、输出力大等显著的特点。基于GMA的众多优点,论文以提高传统电液伺服阀的频宽、响应速度等动态特性为指导思想,利用GMA取代传统电液伺服阀中的力矩马达,设计了一种新型的力反馈式电液伺服阀的实现方案和具体结构,并给出了具体的结构参数设计理论；同时还建立了GMM电液伺服阀的数学模型与动态仿真模型,通过一组原始数据对阀进行了参数设计及仿真研究,并将GMM电液伺服阀与传统电液伺服阀的仿真结果相比较。结果显示,对GMM电液伺服阀,其相位裕度γ=85.6°,幅值裕量Kg=23.5dB,幅频宽ωb=472.6Hz,同等条件下,传统电液伺服阀的相位裕度γ=83.2°,幅值裕量Kg=9.26dB,幅频宽ωb=134.3Hz。可见,利用超磁致伸缩材料研制的电液伺服阀响应更快、精度更高、稳定性更好。图[40]表[6]参[73]
[Abstract]:Giant Magnetostrictive material (GMMs) is a new functional material with large magnetostrictive strain. Because of its high response speed and high output force, it has become a research hotspot in the field of high technology, and its corresponding theoretical and application research is becoming more and more extensive. Various related applications are being developed by researchers around the world. Taking full advantage of the excellent performance of giant magnetostrictive material, a valve electric-mechanical converter, Giant Magnetostrictive Actuator, is designed in this paper. The static and dynamic theoretical analysis is carried out, and its mathematical model is established for dynamic simulation. The simulation results show that the step rise time of GMA is 0.8ms. The steady-state output force F is 1832N, which indicates that GMA has the characteristics of fast response speed and large output force. Based on the many advantages of GMA, the paper uses GMA to replace the torque motor in the traditional electro-hydraulic servo valve by improving the dynamic characteristics of the traditional electro-hydraulic servo valve, such as improving the frequency width and response speed of the traditional electro-hydraulic servo valve. A new type of force feedback electro-hydraulic servo valve is designed. At the same time, the mathematical model and dynamic simulation model of GMM electro-hydraulic servo valve are established, and the parameter design and simulation research are carried out through a group of original data. The simulation results of GMM electro-hydraulic servo valve and traditional electro-hydraulic servo valve are compared. The results show that for GMM electro-hydraulic servo valve, the phase margin is 85.6 掳and the amplitude margin is Kg=23.5dB. Under the same conditions, the phase margin of conventional electro-hydraulic servo valve is 83.2 掳and the amplitude margin is Kg=9.26dB. It can be seen that the electro-hydraulic servo valve developed with giant magnetostrictive material has faster response, higher accuracy and better stability. Diagram [40 tables. [6] refs. [73]
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.522

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