基于频率成型性能指标的主动悬架控制策略的研究

Study of active suspension control algorithm based on frequency shaping performance index

对传统的主动悬架线性二次型控制策略作了改进设计和研究。通过对与平顺性有关的指标项（车体垂直振动、角振动）在性能评价时进行频率加权，并对加权特性在控制策略中加以考虑。与传统的线性二次型全状态反馈控制策略相比，通过振动传递函数、系统对激励的均方响应和系统模态参数的比较，可知改进后的控制策略能够较大地改善车辆的平顺性，而对其他方面的性能指标没有太大影响。

This paper improves the conventional linear quadratic regulator control algorithm of active suspension. When evaluating performance, these indices relating ride comfort (vehicle body heave, pitch acceleration) are frequency shaped by ISO/DIS 2631 1 weighting function, and these characteristics are also considered in control algorithm. Through vibrating transfer function, system average response and system eigenvalue analysis, it is shown that ride quality can be greatly improved without deteriorating other aspects of performance index.