不同位移时滞反馈控制对车身减振的影响

为了研究不同位移时滞反馈控制对车身减振性能的影响。以考虑轮胎阻尼的1/4车辆悬架模型为基础,分别构建车身位移时滞和轮胎位移时滞两种不同状态反馈控制,通过利用劳斯-赫尔维茨稳定性判据和多项式判别理论分别得到不同位移时滞反馈控制系统的稳定性区间。在优化参数范围和约束条件下,以车身加速度、速度和位移为优化目标,采用粒子群算法获得不同控制策略的优化参数。仿真结果表明,相同外部激励下轮胎位移时滞状态反馈控制有较大的稳定性区域和更佳的减振效果,可有效改善车身的振动响应,对进一步研究时滞状态反馈控制在车辆中的应用具有一定的参考价值。

The Influence of Different Displacement Time-Delay Feedback Control on Vehicle Body Vibration Reduction

In order to study the influence of different displacement time-delay feedback control on vibration reduction performance of the vehicle body. Based on the 1/4 vehicle suspension model considering tire damping, two kinds of state feedback control with body displacement delay and tire displacement delay were constructed respectively. The stability regions of different displacement time-delay feedback control were obtained by using the Routh-Hurwitz stability criterion and polynomial discriminant theory. In the range of optimization parameters and constraints, the acceleration, velocity and displacement of vehicle body were taken as optimization objectives, and the optimization parameters of different control strategies were obtained by particle swarm optimization algorithm. The simulation results show that the time-delay state feedback control of tire displacement under the same external excitation has a larger stability region and better damping effect, which can effectively improve the vibration response of vehicle body. It has a certain reference value for further research on the application of time- delay state feedback control in vehicles.