新型磁流變液阻尼器之設計與測試

Design and Testing of an Innovative Magnetorheological Damper

黃耀寬(Yao-Kuan Huang)

指導教授 ： 蕭耀榮

國立臺北科技大學/機電學院/車輛工程系所/碩士(2010年)

摘要

傳統的阻尼器是以油性液體做為阻尼器內部的流動物質，但油性液體其黏滯係數無法大範圍改變，因此傳統的阻尼器為一個黏滯係數不可控阻尼器。近代開發新型液體(磁流變液magnetorheological fluid，簡稱MR fluid)，磁流變液是一種可依電流大小控制磁場強度改變黏滯係數的液體，進而達到可控阻尼力的作用，因此磁流變液有助於可控式阻尼器的發展，以取代傳統的不可控阻尼器。
本研究提出一種新型磁流變液阻尼器之設計，採用多極式線圈取代單一線圈式，當多極式線圈中的單一線圈發生斷裂、漏電、或者短路時，可避免阻尼器作動全面性癱瘓造成危險，同時此阻尼器採用高密合式金屬環片取代塑膠材料性質薄膜設計，提高整體的耐用性與提升磁場強度。
本研究對所設計之新型磁流變液阻尼器，進行系統模型之建立以及最佳化的探討，對磁極數、磁極間距、固定極與磁流變液磁場通道之寬度、有效的使用空間等，進行最佳化分析。經過最佳化後之阻尼器，無論是磁路走向或可用磁力面積都具有優異的表現。研究中進行的模擬分析發現，本研究所設計之新型磁流變液阻尼器與一般磁流變液阻尼器的效能比較下，其阻抗力可提高到百分之四十七之效能。

關鍵字

阻尼器 ； 磁流變液

並列摘要

The traditional damper uses oily fluid as the flowing material within the damper. However, the coefficient of viscosity of the oily liquid can not be changed for large range. In other words, the traditional damper is the one that the viscosity is not controllable. The modern developed novel fluid, Magnetorheological Fluid (referred to as MR Fluid), is a kind of fluid whose coefficient of viscosity can be changed by controlling the strength of magnetic fields according to the size of current intensity, and thus control the damper. In conclusion, the MR Fluid helps the development of the controllable damper in replace of the traditional non-controllable damper.
This study presents a new type of MR fluid damper design. By applying the multi-pole coil in replace of the single-pole coil, it can prevent the risk of comprehensive paralysis caused by damper in case of rupture, leakage electricity, or shorts circuit for one of the multi-pole coils. In addition, the damper adapts the design of high density of metal ring film instead of plastic thin-film material to improve the overall durability and enhance magnetic field strength.
This study constructs the system model and discusses its optimization for the newly designed MR Fluid damper, performing the analysis for the number of poles, pole spacing, flow gap of MR Fluid and effective use of space. The result shows that the damper has excellent performance in terms of magnetic circuit direction and effective magnetic area. According to the simulation analysis, the newly proposed MR Fluid damper increased its resistance force by 47% compared to the traditional once.

並列關鍵字

damper ； magnetorheological

參考文獻

[29] 賴俊吉，個人輕量化載具之可變剛性及阻尼之半主動車輛懸吊系統模擬與分析，碩士論文，台北科技大學車輛工程研究所，2009。

[1] Rabinow, J., “The Magnetic Fluids Clutch,” Electric Engineering,Vol.

[2] Rabinow, J., “Magnetic Fluids Clutch”, National Bureau of Standards

[4] Rosensweig, R. E, Kaiser, R. and Miskolzy. G., “Viscosity of Magnetic Fluid in a Magnetic Fluid,” J. Colloid and Interface Sci., Vol.V.A. Neelakantan and G.N.

[5] Shulman, Z. P., Kordonsky, V. I.,Zaltsgendler, E. A., Prokhorov, I. V., Khusid, B. M. and Demchuk, S. A., “Structure, Physical Properties and Dynamics of Magetorheological Suspensions,” Int. J. Multiphase Flow, Vol. 12, No. 6, pp. 935-955, 1986.