Fractional Modeling and Characteristic Analysis of Hydro-Pneumatic Suspension for Construction Vehicles

The motion differential equation of hydro-pneumatic suspension is established to describe the vibration characteristics for a certain type construction vehicle. output force was deduced from parameters. Based on multi-phase medium, fractional calculus theory introduced, and its Bagley–Torvik formed. numerical computation by low-pass filter Oustaloup algorithm performed. solution nonlinear obtained investigate system. Through building an equal-ratio test platform simulation model, fractional- integer-order model experimental data were compared. When order 0.9, it better describes experiments show that can fit fractional-order system well, thereby prove