主动悬架, H&infin, 控制, 频率加权, 控制器降阶

A dynamics model for a full-vehicle active suspension system with 7 degree-of-freedom was built. Considering the factors of high-frequency dynamic uncertainties and human’s sensitive frequency ranges to vibration, a weighted H∞ controller for the generalized suspension system was designed to restrain the road disturbances. Frequency-weighted coprime factorization based controller reduction method was utilized to reduce the order of the obtained high-order controller. Through ride comfort performance comparision and frequency-domain simulation analyses, the research results demonstrate that the order of high-order controller can be reduced significantly, and the reduced-order suspension closed-loop control system can obtain the similar control performance with the full-order one.