Automobiles Series Hydro-Pneumatic Spring Active Suspension Structural Design and Nonlinear Control System

Abstract

The automotive suspension system is crucial for providing driving comfort and vehicle stability. However, traditional passive suspension systems cannot fully cope with constantly changing road conditions and challenges at different driving speeds. Therefore, this study proposes a new suspension scheme, namely the dual vibration reduction structured (DVRS) active suspension, to address the problem of control force amplification in traditional primary damping suspension configurations. The experiment showed that the nonlinear DVRS active suspension showed significant improvement in the time domain, with the acceleration amplitude of the sprung mass reduced by about 54.27%, 53.03% and 51.03% in high-speed, medium and low-speed conditions, respectively. The comprehensive evaluation index J decreased by about 53%, slightly better than the traditional ideal active suspension. Under bumpy road surfaces, nonlinear DVRS active suspension exhibited better stability, verifying its good adaptability. The research results indicate that by continuously improving suspension design and control methods, more efficient and reliable suspension systems can be achieved, further improving vehicle performance and driving experience. The research on the structural design and nonlinear control system of the series oil gas spring active suspension for automobiles is of great significance for improving driving and riding comfort, enhancing vehicle stability, improving road adaptability and promoting the development of suspension technology.