Performance Analysis Of Hydraulically Interconnected Suspension Based On Motion-mode Energy Method

Anything that can be developed or improved the system of vehicle lateral acceleration threshold to reduce vehicle rollover accidents and improve road safety are of great significance, such as the improved suspension system and anti-rollover system. Among them, a kind of anti-roll hydraulically interconnected suspension (HIS) has become a research hotspot recently. Compared with the active suspension, the suspension not only takes into account the vehicle handling stability and comfort requirements, but also has the features of low cost, reliable performance and good effect.This paper introduced a new method for kinetic studies-Motion-mode Energy Method (MEM), which could calculate the kinetic energy and potential energy stored in the mode according to the physical characteristics of vehicle. Then by comparing the mode energy and its ratio, the effect of HIS on the vehicle movement could be analyzed, which could also validate its anti-roll performance and impact on comfort.Firstly, this paper introduced the structural components and working principle of HIS and the motion-mode energy method. Then, the paper established the transient time domain model of vehicle equipped with HIS, making preparation for the simulation analysis. After that, the paper studied the performance of HIS through the numerical simulation and real vehicle comparison test based on motion-mode energy method. The test results showed that HIS could not only significantly reduce the mode energy and mode-ratio of body-roll mode, but also had little effect on that of body-bounce mode. This meant HIS could improve anti-roll performance of the vehicle, and had little effect on riding comfort. This paper also used the traditional methods to study the characteristics of HIS, and analyzed the sensitivity of the system parameters. At last, the paper presented a method to adjust the stiffness of the HIS system.This paper presented a new method to study the HIS system, which could provide theoretical basis and data support for design and development of related products, with a wide range of applications as well as practical significance.