Hydraulically Interconnected Suspension Parameter Sensitivity in Half-Car Ride Performance

Abstract

In this paper, the development of a hydraulically interconnected suspension (HIS) system model and the integration of this model into a four degree-of-freedom half-car system is briefly introduced. The appropriate frequency response functions are derived in order to simulate the system response to a stochastic road profile. The sprung mass vertical and roll accelerations, the dynamic normal tyre force, and the suspension deflection are considered in the frequency domain up to 20 Hz. Four key hydraulic system parameters are identified and investigated to gauge their effects on the system's dynamic performance. The results indicate that HIS system performance can be greatly affected by these hydraulic parameters.

The Mechanical Characteristics Study on an Interconnected Anti-Rolling Suspension System

“…In Contrast to the independent hydro-pneumatic suspension, the biggest advantage of interconnected oil and gas suspension system is further improving the vehicle's roll stiffness, reducing roll angle while turning, and improving vehicles operation stability. Most of the current research at home and abroad are aiming at the mechanical characteristics of vehicles (stiffness, damping) [1][2][3][4] , however, the study on the mechanical characteristics of roll is relatively less, and the prominent advantage of interconnected oil and gas suspension is embodied in mechanics features.…”

Influence of Key Parameters of Hydraulically Interconnected Suspension on Vehicle Dynamics and Experimental Validation

“…机 械 工 程 学 报 第 53 卷第 14 期期 40 0 前言 为有效改善车辆运动性能，国内外研发了多种 新型悬架系统，如空气悬架 [1][2][3] 、油气悬架 [4][5][6] 和液 压互联悬架(Hydraulically interconnected suspension, HIS) [7] 等。其中，HIS 系统在不同互联模式下能够 对车辆运动模态(如侧倾、 俯仰、 垂向及扭曲等模态) 进行解耦调节，可以协调车辆的操纵稳定性与行驶 平顺性，从而引起国内外研究人员的广泛关注。 SWITH 等 [8] 分析安装有 HIS 系统车辆在鱼钩试验和 半正弦转角输入下车辆的侧倾角、侧倾角速度、侧 向加速度、动态侧翻因子等评价指标的响应行为， 证明了 HIS 比横向稳定杆可提供更优越的操稳性； SMITH 等 [9][10] 建立装有 HIS 系统车辆的侧倾工况半 车模型及试验台架，分析系统油压、液压作动器进 出口压力损失、液体黏度对侧倾角和轮胎抓地力功 率谱的影响，但仅在频域进行了讨论；CAO 等 [11] 研究不同连接模式 HIS 系统对车辆侧倾刚度、俯仰 刚度和阻尼特性的影响；董广明等 [12] 建立 9 自由度 车辆动力学模型，讨论悬架参数、车辆物理参数、 车速等参数对车辆侧翻稳定性的影响； WANG 等 [13] 对装有 HIS 系统车辆的转向特性进行了参数敏感性 分析。 庄德军等 [14] 建立油气弹簧的非线性数学模型， 分析了油气悬架的刚度和阻尼特性；杜恒等 [15][16] 利 用改进的遗传算法优化油气悬架的设计参数；杨波 等 [17] 提出双气室双阻尼油气悬架；王云超等 [18] …”