【摘要】：超磁致伸縮材料(Giant Magnetostrictive Material,簡稱GMM)是一種新型的功能材料,在室溫下的形變量和輸出力大,并且對信號輸入能快速響應,現(xiàn)已成為物理學、材料科學、電磁學、控制工程和機械工程等諸多領域的研究熱點,其應用價值已逐步顯現(xiàn)。 本文基于GMM的眾多優(yōu)點,設計了一種伺服閥用轉換器(Giant Magnetostrictive Actuator,簡稱GMA),并對其進行了靜動態(tài)理論分析,建立數(shù)學模型進行動態(tài)仿真分析,仿真結果顯示GMA階躍上升時間Tr為0.8ms,穩(wěn)態(tài)輸出力F可達1832N,表明GMA具有響應速度快、輸出力大等顯著特點。同時基于該GMA轉換器,設計了一種新型結構的直動式高頻電液伺服閥,并通過理論分析和計算、數(shù)學建模和動態(tài)仿真分析、電磁場有限元分析等,對其關鍵技術進行了系統(tǒng)的研究,得出如下結論：對GMM直動式高頻伺服閥而言,其相位裕度可達γ=84°,幅值裕量Kg＝17dB,幅頻寬ε=499Hz,幅值穿越頻率ωgc=403Hz,相位穿越頻率ωpc=5780Hz,可見基于GMM的直動式高頻伺服閥的響應速度快、精度高、穩(wěn)定性好；轉換器GMA的阻尼系數(shù)、線圈匝數(shù)、閥體結構等對伺服閥動態(tài)特性的影響較大,增大GMA的阻尼系數(shù)可以提高伺服閥的高頻特性,增加線圈匝數(shù)可以增大伺服閥的流量,減少伺服閥的構件數(shù)量可以提高伺服閥的響應速度。 本文的研究可為基于GMM的直動式高頻伺服閥的設計提供了理論基礎,為直動式高頻伺服閥的研究注入了新的活力,同時為進一步優(yōu)化該伺服閥的結構提供了重要依據(jù)。
[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 緯 = 84 擄, 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.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH137.522

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