| 线控转向系统的全状态反馈控制策略 |
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| 引用本文： | 施国标,于蕾艳,林逸.线控转向系统的全状态反馈控制策略[J].农业机械学报,2008,39(2):30-32. |
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| 作者姓名： | 施国标 于蕾艳 林逸 |
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| 作者单位： | 1. 北京理工大学机械与车辆工程学院,100081,北京市
2. 中国石油大学机电工程学院,257061,山东省东营市 |
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| 基金项目： | 国家自然科学基金
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国家高技术研究发展计划(863计划) |
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| 摘 要： | 研究了线控转向系统的车辆全状态(质心侧偏角和横摆角速度)反馈控制策略,根据虚拟前轮侧偏刚度的概念得到横摆角速度和质心侧偏角的反馈系数,研究了虚拟前轮侧偏刚度系数对极点、频率特性等的影响.仿真表明,根据车速选择合适的虚拟侧偏刚度系数,可改变汽车的转向特性,即低速时,该系数为正,过度转向程度增大.提高转向灵敏性;高速时,该系数为负,不足转向程度增大,提高转向稳定性.因此全状态反馈控制策略可提高车辆的操纵稳定性.
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| 关 键 词： | 线控转向 全状态反馈 控制策略 转向特性 |
| 收稿时间： | 2007-03-14 |
| 修稿时间： | 2007年3月14日 |
Research on Full State Feedback Control Strategy of Steer-by-wire |
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| Shi Guobiao,Yu Leiyan,Lin Yi.Research on Full State Feedback Control Strategy of Steer-by-wire[J].Transactions of the Chinese Society of Agricultural Machinery,2008,39(2):30-32. |
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| Authors: | Shi Guobiao Yu Leiyan Lin Yi |
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| Institution: | 1.Beijing Institute of Technology 2.China University of Petroleum |
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| Abstract: | Full states(i.e.slip angle and yaw rate)feedback control strategy was researched and feedback coefficients of slip angle and yaw rate were acquired according to the concepts of virtual front tire cornering stiffness coefficient.Slip angle was estimated with Kalman filter.Effects of virtual front tire cornering stiffness coefficient changing coefficient on poles and frequency characteristics have been researched.Simulations showed that virtual front tire cornering stiffness coefficient changing coefficients could be chosen based on velocities to change steering characteristics:positive coefficient at low velocities leading to oversteer and steering agile;while negative coefficient at high velocities leading to understeer and steering stable.So presented control strategy improved handling and stabilities. |
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| Keywords: | Steer-by-wire Full state feedback Control strategy Steering characteristics |
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