军用越野车辆磁流变半主动悬架的研制及其控制方法研究

项目名称： 军用越野车辆磁流变半主动悬架的研制及其控制方法研究

项目编号： No.51305114

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 白先旭

作者单位： 合肥工业大学

项目金额： 25万元

中文摘要： 基于智能材料磁流变液的半主动可控阻尼器已被研究/应用于汽车悬架振动控制系统中以提高安全性和舒适性。然而对于行驶环境（包括路面环境和行驶速度）极为苛刻的军用越野车辆而言，传统的磁流变阻尼器性能已不能满足半主动悬架系统的控制需要。针对高速行驶于路面环境不确定的军用车辆，本项目(1)提出了一种同时具有冲击控制执行器性能和振动控制执行器性能的磁流变阻尼器原理，实现了在供电系统失效情况时的"失效-安全"性能。该"失效-安全"磁流变阻尼器通过降低活塞运动速度和磁流变液流通液流通道的速度比以降低流通液体的雷诺数，最终提高磁流变阻尼器的可控阻尼比范围，在实现高速冲击用的半主动执行器性能要求的同时满足低速振动控制要求；(2)提出了一种基于"失效-安全"磁流变阻尼器的军用越野车辆半主动悬架的控制方法，根据车辆行驶环境区分冲击控制与振动控制，分别对冲击与振动进行有效控制，最终实现整车悬架系统的协调最优控制。

中文关键词： 磁流变液；冲击控制；高频；挤压；磁流变弹性体

英文摘要： Semi-active controllable dampers, based on smart material magnetorheological fluids, have been applied to vehicle suspension vibration control systems to improve the suspension performances. However, for the military road and off-road vehicles that are driving in tough environments, including poor road conditions and high vehicle speeds, conventional magnetorheological dampers cannot meet the control requirements for the semi-active suspension systems based on magnetorheological dampers. In order to address the suspension problems due to the uncertain environments, in this project, (1) the principle of a magnetorheological damper that simultaneously has shock control actuator performance and vibration control actuator performance is proposed, and fail-safe performance of the magnetorheological damper is integrated as well. The fail-safe magnetorheological damper can be applied in both the shock and vibration control systems, since large range of dynamic controllable ratio of the damper is achieved by decreasing the ratio of piston speed of the damper to the fluid flow speed through the fluid flow channel. The dynamic controllable ratio that is dependent on the Reynolds number of the fluid through the fluid flow channel is determined by the piston-fluid speed ratio. (2) A control strategy for suspensions of milit

英文关键词： Magnetorheological fluids；shock control；high frequency；squeeze；Magnetorheological elastomer