Pemodelan Active Magneto-Pneumatics Suspension Sistem Shock Absorber Berbasis Magnet Nd-Fe-B sebagai Pengganti Sistem Pegas pada Kendaraan Bermotor Dyah Sawitri, Yerry Susatio, Suko Bagus Trisnanto

Abstract

In this paper, the magnet use as an automotive vibration isolation will be explained. It is based on expelling forces that between two similar magnetic poles. A model of active magneto-pneumatic suspension system is developed to simulate the required magnet performance by analysing the magnetic flux distribution and its related suspension response. Both geometrical and mathematical models consist of suspension sub-components (i.e. Nd-Fe-B permanent magnet and electromagnet which are in serial-vertical structure, with refer to magnetic levitation based on polarisation principle) and vibration control sub-components (piezoelectric and its amplifier, PID voltage coltroller, and power amplifier. Results shown that the Nd-Fe-B permanent magnet have a good performance for isolating automative vibration, indicated by the small transmissibility and high stability of suspension response. With a hydraulic pressure of 0.125 bar and a forward control on active magneto-pneumatic suspension system, respected transmissibility values obtained are 0.9% - 7% for sinusoidal path profile, 6.5%-25% for bump path profile, and 2.5% for random profile.