【摘要】 本文从提高汽车的乘坐舒适性角度出发,研究了主动悬架的最优控制问题。根据坐位人体的振动响应特性构造了频域计权形式二次型性能指标函数。在性能指标函数中采用与频率相关的计权矩阵可以对系统特定频带的振动状态施以重权或弱权,以体现设计者对此振动频带的关心程度。仿真结果表明,主动悬架有效地降低了汽车簧载质量的垂直振动加速度,采用频域计权形式二次型性能指标函数可进一步降低车身在坐姿乘员敏感频率范围内的振动强度。更多还原

【Abstract】 This Paper develops a Control law of active suspension for ride quality improvement. The performance is represented by frequency-shaped index according to the vibration characteristics of sitting, body. Introducing the frequency-dependent weighting matrices allow one to emphasize the specific variables related to the vibration at specific bands of frequencies. The numerical results show that active suspension greatly reduces the vertical acceleration of sprung mass and the vibration intensity in the range of frequencies sensitive. to sitting body can be further lowered by the used of frequency-dependent weighting function更多还原