Abstract
This paper details the non-linear dynamic behaviours and control of a non-linear semi-active suspension system using a quarter-car model under kinematic excitation by a road surface profile. The results of local and global bifurcation analysis indicate that the hysteretic non-linear characteristics of damping force cause the suspension system to exhibit codimension-two bifurcation, resulting in homoclinic orbits and a pitchfork bifurcation. The complex dynamic behaviour of automotive suspension systems was examined using a bifurcation diagram, phase portraits, a Poincaré map, and frequency spectra. We also used Lyapunov exponent to identify the occurrence of chaotic motion and verify our analysis. Finally, a dither signal control was used to convert chaotic behaviours into periodic motion. Simulation results verify the effectiveness of the proposed control method.
Original language | English |
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Pages (from-to) | 340-359 |
Number of pages | 20 |
Journal | International Journal of Vehicle Autonomous Systems |
Volume | 13 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2017 |
Keywords
- Lyapunov exponent
- bifurcation
- chaotic
- codimension-two
- dither.
ASJC Scopus subject areas
- Control and Systems Engineering
- Automotive Engineering
- Electrical and Electronic Engineering