Manyetoreolojik Amortisör Prototipinin Deneysel Çalışması ve Eşdeğer Sönüm Katsayılarının Elde Edilmesi

Bu çalışmada, kontrol edilebilir sönümleme kuvveti sağlayan manyetoreolojik (MR) bir amortisör prototipi tasarlanmış, üretilmiş ve test edilmiştir. MR amortisör pistonunun tasarımı ve boyutları ANSYS/Emag (Elektromanyetik) yazılımında yapılan statik manyetik analiz sonuçlarına göre belirlenmiştir. MR amortisörün sönümleme performansı, bir amortisör test cihazı kullanılarak laboratuvarda test edilmiştir. Testler, MR amortisörün bobinine uygulanan farklı akımlar altında gerçekleştirilmiştir. Test sonuçlarına göre farklı akımlar için MR amortisörün eşdeğer sönüm katsayıları hesaplanmıştır. Test sonuçları, 3,18 Hz frekans ve uygulanan 2 A akım değeri için, en yüksek sönümleme kuvvetinin 169,4 N olduğunu göstermektedir. Bu durumda, eşdeğer sönümleme katsayısı 302 Ns/m'dir. Bobine akım verilmediğinde eşdeğer sönümleme katsayısı 181 Ns/m'dir. Dinamik kuvvet aralığının alanı da uygulanan akımın artmasıyla büyümüştür. Ayrıca MATLAB/Simulink'te çeyrek taşıt modeli tabanlı simülasyon sonuçlarına göre MR amortisör kullanan yarı aktif süspansiyon sisteminin titreşim azaltmada daha etkili ve başarılı olduğu görülmüştür.

Anahtar Kelimeler:

Manyetoreolojik sıvı, manyetoreolojik amortisör, eşdeğer sönümleme, çeyrek taşıt modeli, manyetik analiz

Experimental Study on Magnetorheological Damper Prototype and Obtaining Its Equivalent Damping Coefficients

In this work, a magnetorheological (MR) damper prototype that provides controllable damping force was designed, manufactured and tested. The design and dimensions of the MR damper piston were determined according to the static magnetic analysis results made in ANSYS/Emag (Electromagnetics) software. The MR damper’s damping performance was tested in laboratory by utilizing a damper testing device. The tests were carried out under different currents applied to coil of the MR damper. According to the test results, the equivalent damping coefficients of the MR damper were calculated for different currents. The test results show that the highest damping force is 169.4 N with frequency of 3.18 Hz and applied current of 2 A. In this case, the equivalent damping coefficient is 302 Ns/m. The equivalent damping coefficient is 181 Ns/m when no current is supplied to the coil. The area of the dynamic force range also becomes larger with increasing the applied current. In addition, according to the quarter car model based simulation results in MATLAB/Simulink, it was seen that the semi-active suspension system using MR damper was more effective and successful in vibration mitigation.

Keywords:

Magnetorheological fluid, magnetorheological damper, equivalent damping, quarter car model, magnetic analysis,

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