Studi Karakteristik Pengaruh Variasi Kuat Arus dan Variasi Gap terhadap Stiffness Effect pada Magnetorheological Damper

Hereno, Kevin Alvaro (2023) Studi Karakteristik Pengaruh Variasi Kuat Arus dan Variasi Gap terhadap Stiffness Effect pada Magnetorheological Damper. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan teknologi dalam bidang peredaman getaran dan kontrol gerakan telah memberikan kontribusi yang signifikan dalam berbagai industri seperti otomotif, konstruksi, dan industri manufaktur. Salah satu teknologi yang telah mendapatkan perhatian luas adalah peredaman magnetorheological (MR) Damper. MR Damper adalah jenis peredam yang menggunakan fluida magnetorheological, yang merupakan campuran partikel magnetisasi dengan cairan pembawa. Ketika medan magnet diterapkan pada fluida MR, sifat aliran dan viskositas fluida dapat berubah secara reversibel dan instan, memungkinkan pengaturan dan kontrol yang presisi terhadap peredaman. Oleh karena itu, penelitian ini bertujuan untuk menyelidiki pengaruh variasi kuat arus dan variasi gap pada MR Damper ketika berfungsi sebagai pengganti fungsi coil spring dalam situasi stationary regime. Pendekatan yang digunakan adalah kombinasi eksperimen dan simulasi numerik. Eksperimen dilakukan untuk memberikan hasil sesuai dengan keadaan dengan dunia nyata dengan kelemahan yaitu keterbatasan untuk memvariasikan gap.Maka dilanjutkan dengan simulasi menggunakan software ANSYS mechanical magnetostatic 2022 R2. Simulasi menggunakan variasi kuat arus 0.1A-1A dengan peningkatan sebesar 0.1A untuk mendapatkan nilai magnetic flux density. Setelah nilai flux density diketahui dilanjutkan dengan perhitungan dengan variasi gap 1mm-4mm dengan peningkatan sebesar 1mm dihitung di dalam rumus menggunakan rumus untuk mendapatkan nilai gaya total pada MR Damper. Dalam simulasi dan eksperimen, terdapat perbedaan antara nilai F total yang dihasilkan. Meskipun terdapat perbedaan absolut antara kedua nilai tersebut, dengan rata-rata persentase error sebesar 5.52%, terlihat bahwa semakin besar kuat arus, semakin tinggi nilai F total baik dalam simulasi maupun eksperimen. Kemudian hasil simulasi dan perhitungan pada MR Damper dengan variasi kuat arus listrik dan variasi gap didapatkan hasil gaya MR (Fmr) dalam MR Damper berbeda pada setiap ukuran gap. Gap dengan ukuran yang lebih kecil menghasilkan nilai Fmr yang lebih besar.
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The development of technology in the field of vibration damping and motion control has significantly contributed to various industries such as automotive, construction, and manufacturing. One technology that has gained wide attention is the magnetorheological (MR) Damper. MR Damper is a type of Damper that utilizes magnetorheological fluid, which is a mixture of magnetized particles with a carrier liquid. When a magnetic field is applied to the MR fluid, the flow properties and viscosity of the fluid can change reversibly and instantly, enabling precise adjustment and control of damping. Therefore, this study aims to investigate and analyze the performance of MR Dampers with a focus on aspects such as current strength variations, response to different magnetic fields, and the influence of design parameters on damping characteristics. With a better understanding of MR Damper behavior, more effective and optimal control strategies can be developed for various applications. The design and design simulation were conducted using ANSYS Mechanical Magnetostatic 2022 R2 software. The simulations involved varying the current strength from 0.1A to 1A with an increment of 0.1A to obtain the magnetic flux density value. Once the flux density value is known, calculations were carried out with gap variations from 1mm to 4mm, incrementing by 1mm, using the formula to obtain the total force value on the MR Damper. The study will be conducted by assembling a model circuit during the simulation process, which will be used for experiments involving linear loading on the MR Damper. In both simulation and experimentation, there were differences in the resulting total force (F_total) values. Although there are absolute differences between these two values, with an average percentage error of 5.52%, it can be observed that higher current strength leads to higher F total values in both simulation and experimentation. Furthermore, the simulation and calculation results for the MR Damper with variations in current strength and gap size showed different MR forces (Fmr) within the MR Damper for each gap size. Smaller gap sizes resulted in larger Fmr values.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	MR damper, MRF silicone oil, magnetic flux density, total force, stiffness effect
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA417.3 Magnetic testing. T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL257 Springs and suspension
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Kevin Alvaro Hereno
Date Deposited:	06 Oct 2023 01:56
Last Modified:	06 Oct 2023 01:56
URI:	http://repository.its.ac.id/id/eprint/103758

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