多極式磁流變液阻尼器之最佳化設計與測試

本研究針對磁流變液阻尼器，設計一多極式磁流變液阻尼器(MR阻尼器)，以有效增強阻尼作用力之範圍。研究中對此MR阻尼器之創新四極式阻尼塊進行磁路模擬分析，確定各磁路均可垂直通過磁流變液而提供高黏滯阻力，且各處磁場強度均未達磁飽和。由於MR阻尼器之外筒亦為磁路傳導路徑，其厚度影響磁場飽和、整體阻尼力及輕量化，研究中針對外筒厚度進行最佳化設計，再以其數學模式進行F-D及F-V圖之阻尼特性。該MR阻尼器並繪出工程圖後製作成實體，進行實際測試；由測試結果中可看出，阻尼器之阻尼力可隨電流增加而大幅上升，在低速下，阻尼力可有7.66倍之變化，在高速下阻尼力亦有2.56倍之變化，顯示此多極式磁流變液阻尼器具有高阻尼力及高可控制範圍，極適合作為半主動式懸吊系統之可變阻尼器。本論文同時進行改良式多極式MR阻尼器之最佳化設計與分析，設計一改良式多極式MR阻尼器，研究中對此MR阻尼器之各個元件進行磁路模擬分析，確定各處磁場強度均未達磁飽和。分析結果得知磁路垂直通過磁流變液，且廣泛運用磁流變液層之鏈結面積而提升鏈結力，MR提供之黏滯力大小為1.85 N，相較於改良式第一階段MR阻尼器之黏滯力(1.276 N)提升約1.44倍。

關鍵字

磁流變液；阻尼器；多極式阻尼器；半主動懸吊系統；輕量化

並列摘要

This paper focuses on developing a novel multi-pole magneto-rheological damper (MR damper or MR shock absorber). Such a new MR damper can effectively increase the controllable range of damping force. Magnetic simulation is performed for a 4-pole damper. Results show that all magnetic fields vertically penetrate magneto-rheological fluid to provide high viscous force, and no magnetic saturation occurs inside the damper structure. Since the outer cylinder is also the path of magnetic flux, cylinder thickness, which affects magnetic saturation, total viscous force and damper weight, is evaluated to find an optimal thickness. The damper is then manufactured and tested in test bed. Test results show that the damping force increases as the applied current increases. At low damper moving speed, damping force has 766 % variation, and it is 256 % for high moving speed. Consequently, due to the high damping force and very wide controllable range, this multi-pole MR damper is an excellent variable damping damper for semi-active suspension systems. This thesis aims to simultaneously improve multi-pole type MR damper. To find the optimal design, optimization and analysis and experiment have been conducted. In this study, various components of the MR damper with their geometrical dimensions were used for magnetic simulation and analysis to determine the entire magnetic field strength and avoid magnetic saturation. Through the magnetic circuit analysis, the extension of active MR layer area and the enhancement of damping force have been achieved. The MR damper provides the maximum damping force at 1.85 N, compared to the first-stage MR damper which is performed only at 1.276 N. The increment is rated approximately at 144%.

並列關鍵字

magneto-rheological fluid ； damper ； multi-pole damper ； semi-active suspension ； lightweight

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，台北，2009。

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國際替代計量

多極式磁流變液阻尼器之最佳化設計與測試

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