摘要
建立了7自由度汽车整车悬架模型,考虑人体对垂直和旋转方向振动的敏感频率范围,设计频率加权的H∞控制器。进而在选取特定加权矩阵保证降阶闭环系统稳定前提下,应用基于频率加权左互质分解的控制器降阶方法,对所设计的高阶H∞控制器进行降阶。仿真结果表明,控制器的阶数能够被较大程度地降低,而闭环控制效果损失很小,证明了频率加权左互质分解控制器降阶方法的有效性。
A 7-DOFs state-space model for vehicle suspension system is built. In view of the frequency ranges of human＇s sensitivity to vibration in different directions, a frequency-weighted controller is designed. Then under the precondition of choosing specific weighted matrix to ensure the stability of lower-order closed-loop system, and by applying the controller order reduction technique based on frequency-weighted left coprime factorization （ FWLCF）, the order of designed controller is reduced, and corresponding simulations are carried out. The simulation results show that the controller order is considerably reduced with reasonable closed-loop control effects, showing the effectiveness of FWLCF-based controller order reduction technique.
出处
《汽车工程》
EI
CSCD
北大核心
2006年第9期812-816,853,共6页
Automotive Engineering
基金
国家自然科学基金项目(50275045
50575064)
国家自然科学基金国际合作项目(50411130486)资助
关键词
主动悬架
H∞控制
控制器降阶
互质分解
Active suspension, H∞ control, Controller order-reduction, Coprime factorization
