Analisa Perbandingan Performa Sistem Series Active Variable Geometric Suspension pada Konfigurasi Double Wishbone dan Trailing Arm

Sakti, Bima Bintang (2026) Analisa Perbandingan Performa Sistem Series Active Variable Geometric Suspension pada Konfigurasi Double Wishbone dan Trailing Arm. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Suspensi memiliki peran penting untuk meningkatkan kenyamanan dan keselamatan pengendara. Namun, suspensi pasif memiliki keterbatasan karena karakteristik pegas dan peredam yang bersifat tetap sehingga tidak mampu beradaptasi terhadap perubahan kondisi jalan. Salah satu pengembangan yang dilakukan untuk mengatasi keterbatasan tersebut adalah Series Active Variable Geometry Suspension (SAVGS) yang memanfaatkan perubahan geometri suspensi melalui aktuator dan sistem kendali. Penelitian ini bertujuan merancang test-rig SAVGS modular yang dapat digunakan pada konfigurasi suspensi double-wishbone dan trailing-arm, serta menganalisis pengaruh tipe konfigurasi suspensi terhadap kenyamanan kendaraan. Pemodelan dilakukan menggunakan model quarter-car dengan lima variabel keadaan yang terlebih dahulu dilinearkan untuk perancangan pengendali Linear Quadratic Regulator (LQR). Simulasi dilakukan menggunakan MATLAB/Simulink dan Simscape Multibody pada dua jenis profil jalan, yaitu bump road dan rumble strip road. Kinerja sistem dievaluasi berdasarkan Root Mean Square (RMS) percepatan sprung mass, defleksi suspensi, dan defleksi roda. Hasil penelitian menunjukkan bahwa test-rig SAVGS modular berhasil dirancang dan mampu mengakomodasi kedua konfigurasi suspensi melalui penggantian komponen secara modular. Penerapan SAVGS mampu menurunkan nilai RMS percepatan sprung mass pada seluruh konfigurasi dibandingkan suspensi pasif, dengan peningkatan kinerja sebesar 17,32% hingga 42,81% pada pengujian bump road dan 12,15% hingga 32,27% pada pengujian rumble strip road. Berdasarkan hasil simulasi, konfigurasi trailing-arm menghasilkan nilai RMS percepatan sprung mass yang lebih rendah dibandingkan double-wishbone, sehingga memberikan tingkat kenyamanan kendaraan yang lebih baik pada kedua kondisi jalan yang diuji.
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The suspension system plays an important role in improving vehicle ride comfort and safety. However, conventional passive suspension systems have limitations due to their fixed spring and damper characteristics, making them incapable of adapting to varying road conditions. One approach to overcome these limitations is the Series Active Variable Geometry Suspension (SAVGS), which enhances suspension performance by modifying the suspension geometry through an actuator and a control system. This study aims to design a modular SAVGS test rig capable of accommodating both double wishbone and trailing arm suspension configurations and to investigate the effect of suspension configuration on vehicle ride comfort. A quarter-car model with five state variables was developed and linearized for the design of a Linear Quadratic Regulator (LQR) controller. Simulations were carried out using MATLAB/Simulink and Simscape Multibody under two road excitation profiles, namely bump road and rumble strip road. The suspension performance was evaluated based on the root mean square (RMS) of sprung mass acceleration, suspension deflection, and tire deflection. The results show that the proposed modular SAVGS test rig was successfully designed and is capable of accommodating both suspension configurations through a modular component replacement mechanism. The implementation of SAVGS reduced the RMS sprung mass acceleration in all configurations compared with the passive suspension, achieving performance improvements ranging from 17.32% to 42.81% under bump road excitation and 12.15% to 32.27% under rumble strip road excitation. Furthermore, the trailing arm configuration consistently produced lower RMS sprung mass acceleration than the double wishbone configuration, indicating superior ride comfort under both road conditions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Series Active Variable Geometry Suspension (SAVGS), quarter-car, double-wishbone, trailing-arm, Linear Quadratic Regulator (LQR), kenyamanan kendaraan ============================================== Series Active Variable Geometry Suspension (SAVGS), quarter-car model, double wishbone, trailing arm, Linear Quadratic Regulator (LQR), ride comfort.
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL257 Springs and suspension T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL257.5 Automobiles--Shock absorbers--Design and construction. T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL521.3 Automatic Control
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Bima Bintang Sakti
Date Deposited:	04 Aug 2026 07:43
Last Modified:	04 Aug 2026 07:43
URI:	http://repository.its.ac.id/id/eprint/143268

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