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车辆的悬架系统对于其舒适性和操纵稳定性都起着关键作用。随着计算机技术和液压伺服元件的发展，出现了主动和半主动悬架系统，在其控制策略上具有二次型性能指标的最优控制方法比较成熟。通过建立系统的数学模型和仿真计算，对全状态反馈、有限状态反馈和被动悬架进行了对比分析，表明主动悬架采用的有限状态反馈较全状态反馈有明显优势，是一种比较实用的状态反馈控制方法。
The vehicle’s suspension system plays a key role in its comfort and handling. With the development of computer technology and hydraulic servo components, active and semi-active suspension systems appear, and the optimal control method with quadratic performance index in its control strategy is relatively mature. Through the establishment of the mathematical model and the simulation calculation, the full state feedback, finite state feedback and passive suspension are compared and analyzed. It shows that the finite state feedback used by the active suspension has obvious advantages over the full state feedback. It is a practical Status feedback control method.