基于GMM的直动式高频微小伺服阀关键技术研究
发布时间：2019-03-19 19:58
【摘要】：超磁致伸缩材料(Giant Magnetostrictive Material,简称GMM)是一种新型的功能材料,在室温下的形变量和输出力大,并且对信号输入能快速响应,现已成为物理学、材料科学、电磁学、控制工程和机械工程等诸多领域的研究热点,其应用价值已逐步显现。 本文基于GMM的众多优点,设计了一种伺服阀用转换器(Giant Magnetostrictive Actuator,简称GMA),并对其进行了静动态理论分析,建立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可达1832N,表明GMA具有响应速度快、输出力大等显著特点。同时基于该GMA转换器,设计了一种新型结构的直动式高频电液伺服阀,并通过理论分析和计算、数学建模和动态仿真分析、电磁场有限元分析等,对其关键技术进行了系统的研究,得出如下结论：对GMM直动式高频伺服阀而言,其相位裕度可达γ=84°,幅值裕量Kg＝17dB,幅频宽ε=499Hz,幅值穿越频率ωgc=403Hz,相位穿越频率ωpc=5780Hz,可见基于GMM的直动式高频伺服阀的响应速度快、精度高、稳定性好；转换器GMA的阻尼系数、线圈匝数、阀体结构等对伺服阀动态特性的影响较大,增大GMA的阻尼系数可以提高伺服阀的高频特性,增加线圈匝数可以增大伺服阀的流量,减少伺服阀的构件数量可以提高伺服阀的响应速度。 本文的研究可为基于GMM的直动式高频伺服阀的设计提供了理论基础,为直动式高频伺服阀的研究注入了新的活力,同时为进一步优化该伺服阀的结构提供了重要依据。
[Abstract]:(Giant Magnetostrictive Material, (Giant Magnetostrictive material for short GMM) is a new kind of functional material with large deformation and output force at room temperature, and fast response to signal input. It has become a kind of physics, material science, electromagnetism, and so on. The research hotspots in many fields, such as control engineering and mechanical engineering, have gradually shown their application value. In this paper, based on the advantages of GMM, a servo valve converter named GMA), is designed, and the static and dynamic theoretical analysis is carried out, and the mathematical model is established for dynamic simulation analysis. The simulation results show that the step-up time Tr of GMA is 0.8 Ms and the steady-state output force F is up to 1832N. It is shown that GMA has the characteristics of fast response and large output force. At the same time, based on the GMA converter, a new type of direct-acting high-frequency electro-hydraulic servo valve is designed, and through theoretical analysis and calculation, mathematical modeling and dynamic simulation analysis, electromagnetic field finite element analysis, etc. The key technology is studied systematically, and the following conclusions are drawn: for GMM direct-acting high frequency servo valve, the phase margin can reach 纬 = 84 掳, the amplitude margin Kg=17dB, amplitude-frequency width 蔚 = 499Hz, the amplitude traversal frequency 蠅 gc=403Hz, phase traversal frequency 蠅 pc=5780Hz,. It can be seen that the direct-acting high frequency servo valve based on GMM has the advantages of fast response, high precision and good stability. The damping coefficient of converter GMA, the number of coil turns, and the structure of valve body have great influence on the dynamic characteristics of servo valve. Increasing the damping coefficient of GMA can improve the high frequency characteristic of servo valve, and increasing the number of coil turns can increase the flow rate of servo valve. Reducing the number of components of the servo valve can improve the response speed of the servo valve. The research in this paper can provide a theoretical basis for the design of direct-acting high-frequency servo valve based on GMM, inject new vitality into the study of direct-acting high-frequency servo valve, and provide an important basis for further optimizing the structure of the servo valve.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.522
本文编号：2443847
[Abstract]:(Giant Magnetostrictive Material, (Giant Magnetostrictive material for short GMM) is a new kind of functional material with large deformation and output force at room temperature, and fast response to signal input. It has become a kind of physics, material science, electromagnetism, and so on. The research hotspots in many fields, such as control engineering and mechanical engineering, have gradually shown their application value. In this paper, based on the advantages of GMM, a servo valve converter named GMA), is designed, and the static and dynamic theoretical analysis is carried out, and the mathematical model is established for dynamic simulation analysis. The simulation results show that the step-up time Tr of GMA is 0.8 Ms and the steady-state output force F is up to 1832N. It is shown that GMA has the characteristics of fast response and large output force. At the same time, based on the GMA converter, a new type of direct-acting high-frequency electro-hydraulic servo valve is designed, and through theoretical analysis and calculation, mathematical modeling and dynamic simulation analysis, electromagnetic field finite element analysis, etc. The key technology is studied systematically, and the following conclusions are drawn: for GMM direct-acting high frequency servo valve, the phase margin can reach 纬 = 84 掳, the amplitude margin Kg=17dB, amplitude-frequency width 蔚 = 499Hz, the amplitude traversal frequency 蠅 gc=403Hz, phase traversal frequency 蠅 pc=5780Hz,. It can be seen that the direct-acting high frequency servo valve based on GMM has the advantages of fast response, high precision and good stability. The damping coefficient of converter GMA, the number of coil turns, and the structure of valve body have great influence on the dynamic characteristics of servo valve. Increasing the damping coefficient of GMA can improve the high frequency characteristic of servo valve, and increasing the number of coil turns can increase the flow rate of servo valve. Reducing the number of components of the servo valve can improve the response speed of the servo valve. The research in this paper can provide a theoretical basis for the design of direct-acting high-frequency servo valve based on GMM, inject new vitality into the study of direct-acting high-frequency servo valve, and provide an important basis for further optimizing the structure of the servo valve.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.522
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