- 會議論文
多極式磁流變液阻尼器之設計與測驗
Design and Test of a Multi-pole Magneto-rheological Damper
摘要
本研究針對磁流變液阻尼器，設計一新型多極式磁流變液阻尼器（MR阻尼器），採用與傳統MR阻尼器完全不同之結構設計與磁路設計，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圖之動態模擬。該MR阻尼器並經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，顯示此新型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。
並列摘要
This paper focuses on developing a novel multi-pole magneto-rheological damper (MR damper) whose structure and operation concept are totally distinct from conventional single-pole MR dampers. 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 700 % variation, and it is 256 % for high moving speed. Consequently, due to the high damping force and very wide controllable range, this new multi-pole MR damper is an excellent variable damping damper for semi-active suspension systems.