| 汽车悬架系统的H∞时滞主动控制 |
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| 引用本文：武宏强,闫盖.汽车悬架系统的H∞时滞主动控制[J].上海第二工业大学(中文版),2025,42(4):411-417 |
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| 基金项目:上海第二工业大学校基金(EGD20XQD03) 资助 |
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| 中文摘要:汽车悬架系统关乎乘坐舒适性和车辆操纵稳定性, 由于主动悬架控制回路存在时滞而使得系统复杂性和非线性特征增加, 本文采用理论与仿真结合的方法, 运用H∞时滞主动控制策略, 研究悬架系统振动特性。首先建立了车身垂向、俯仰和侧倾运动的七自由度悬架系统随机动力学模型; 然后通过Lyapunov-Krasovskii 泛函和自由权矩阵法, 设计了H∞时滞主动控制器; 最后通过仿真计算验证控制策略的实效性。结果表明, 提出的H∞ 时滞主动控制在多种路面条件和不同车速下, 均能显著降低车身质心垂向、侧倾和俯仰加速度, 悬架动行程及动载荷也均在规定范围内, 因此控制器增强了车辆的乘坐舒适性和操控稳定性, 具有较好的鲁棒性和适应性, 为汽车悬架系统设计提供了一种新的理论基础和实践指导。 |
| 中文关键词:汽车悬架 H∞控制 时滞 随机路面 |
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| H∞ Time-Delay Active Control of Vehicle Suspension System |
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| Abstract:The vehicle suspension system is regarded as crucial for ensuring ride comfort and handling stability. It is recognized that time delays in active suspension control loops increase system complexity and introduce nonlinear characteristics. In this study, a combined theoretical and simulation approach was adopted to investigate the vibration characteristics of the suspension system using an H∞ time-delay active control strategy. First, a seven-degree-of-freedom stochastic dynamic model was established, which included vertical, pitch, and roll motions of the vehicle body. Then, an H∞ time-delay active controller was designed based on the Lyapunov-Krasovskii functional and free-weighting matrix method. The proposed control strategy was validated through simulation. The results show that the H∞ time-delay active control effectively reduces the vertical, roll, and pitch accelerations of the vehicle,s center of mass under various road conditions and speeds. The suspension dynamic travel and dynamic load remain within acceptable limits, improving ride comfort and handling stability. The controller is robust and adaptable, providing theoretical and practical insights for the design of vehicle suspension systems. |
| keywords:vehicle suspension H∞control time delay stochastic road |
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