Experimental study on wheeled vehicle hydro-pneumatic suspension fault detection

A four-channel MTS road simulation system, which is used to regenerate the acceleration signal at the axle head is presented. A new fault detection method is proposed, which is based on the remote parameter control (RPC) technology for vehicle hydro-pneumatic suspension system. The transfer function between the drive signals and the axle head acceleration should be identified before the RPC iterative calculation on a computer. By contrasting with the desired frequency response functions (FRF), excited through the sample spectrum of road, the iterative convergence speed of the drive function and weighted error are used to detect faults existing in the vehicle's suspension. Experimental results show that during the process of regeneration of the acceleration signal at the axle head, the characteristics of failure of the hydro-pneumatic spring are changed randomly resulting in a dramatic increase in calculation of the RPC iterative, which enables relatively large iterative convergence errors. This method can quickly detect and locate a suspension fault and is a simple bench test way in suspension fault detection.