Frequency-Based Modeling of a Vehicle Fitted With Roll-Plane Hydraulically Interconnected Suspension for Ride Comfort and Experimental Validation

Abstract

A frequency-based modeling approach has been developed for the vehicle fitted with Hydraulically Interconnected Suspension (HIS) system. This frequency-based model has fewer degrees of freedom (DOF) than the reference time-based model. Several physical parameters of HIS system are selected to analytically investigate their effects on several indicators of vehicle roll, pitch and bounce modes, such as roll and pitch angular acceleration, vertical acceleration, and tire ground force. The HIS system parameters are also coordinately tuned and optimized to meet the ride comfort requirement. The full vehicle drop test is conducted for the experimental validation. The analytical results of the proposed model have a good agreement with the measurements. INDEX TERMS Vehicle suspension, ride comfort, hydraulically interconnected suspension, frequencybased modelling, parameter tuning, experimental validation.

Hydraulic Integrated Interconnected Regenerative Suspension: Modeling and Characteristics Analysis

“…With the model in the frequency domain, the modal analysis of the system could be performed and the system's own characteristics could be analyzed. The corresponding results disclosed a good agreement with experiments [19].…”

“…Zhang et al [ 18 ] proposed a frequency domain method to study the hydraulic interconnected suspension system, derived the coupled frequency-related equations and obtained the free vibration solution and frequency response function of a half-vehicle system. Wang et al [ 19 ] did further research. He applied this method to a 7-degree-of-freedom model and studied the effects of several parameters on the roll, pitch and bounce modes of the vehicle.…”

“…The existing modeling methods of the mechanical–hydraulic coupled vehicle systems were either in time domain [ 21 , 22 , 23 ] or in frequency domain [ 18 , 19 , 20 ]. The frequency-domain modeling research mostly utilized the transfer matrix method to evaluate the impedance matrix of the hydraulic subsystem.…”

Research on Damping Characteristics of Interconnected Hydropneumatic Suspension considering the Effects of Hose and Check Valve

“…However, for ICHPS, the left and right (front and back or cross) hydraulic cylinders are interconnected with each other, which not only has the advantages of IDHPS but also can restrain each other when the road is not smooth, to keep the whole vehicle in a balanced state. A large body of research work mainly focuses on the following four aspects: (i) optimisation of the stiffness and damping characteristic of the IDHPS [9-11, 17, 18], (ii) research on antiroll and antipitch performance of IDHPS [15,[19][20][21][22][23][24][25], (iii) control of active or semiactive HPS system [26][27][28][29][30], and (iv) energy recovery of HPS [31][32][33][34].…”

Study on compliant actuator based on compliance features of flexible hinges

“…With the development of optical communication technology, the optical positioning platform is developing toward high precision and a large working stroke. Meanwhile, the amplification of the working stroke of the optical positioning platform will result in the accumulation of errors, which may reduce positioning precision (Xu, 2013). The ability to realize the balance between high precision and a large working stroke is the bottleneck of the optical precise positioning instrument's development.…”