具有参数不确定性的车辆座椅悬架H∞输出反馈半主动控制

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 93-97.

论文

具有参数不确定性的车辆座椅悬架H∞输出反馈半主动控制

张志勇1,2，刘鑫1，黄彩霞2，王向红1

作者信息 +

H∞ Output Feedback Semi-active Control of Vehicle Seat Suspension with Parameters Uncertainty

Zhang Zhiyong1, Liu Xin1, Huang Caixia2, Wang Xianghong1

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文章历史 +

摘要

针对座椅悬架系统的参数不确定性和位移测量难题，基于线性矩阵不等式和H∞最优控制理论，建立了座椅悬架系统的参数不确定性H∞输出反馈控制器。控制器利用估计的状态采用鲁棒控制策略计算期望控制力。磁流变阻尼器的控制电压在满足半主动和极值约束条件下，比较期望控制力与当前阻尼力的大小，应用开关控制算法进行调整，使得磁流变阻尼器产生跟踪期望控制力的阻尼力。数值仿真结果证明，该控制器在仅利用座椅架的加速度作为测量输出进行状态估计，以及在座椅悬架系统具有参数不确定性的情况下，仍能有效地对座椅外部激励进行隔振，改善驾驶员的乘坐舒适性。

Abstract

For the parameters uncertainty and the puzzle of displacement measurement in seat suspension system, based on linear matrix inequality and H∞ optimal control theory, an H∞ output feedback controller of seat suspension system subject to parameters uncertainty is established. This controller can produce expected control force by using of the system measuring output to estimate states. The control voltage of magneto-rheological damper is adjusted by on-off control algorithm, in which the expected control force is compared with the current damper force under the restrict of semi-active and extremum limitation，and the damper force of magneto-rhological damper can track the expected control force well. The result of numeric simulations testify that the controller can effectively isolate the seat from external exciting and improve ride comfort of driver, even if only the seat acceleration is acted as measuring output for states estimation and there are parameters uncertainty in seat suspension.

导出引用

张志勇;刘鑫;黄彩霞;王向红. 具有参数不确定性的车辆座椅悬架H∞输出反馈半主动控制[J]. 振动与冲击, 2013, 32(14): 93-97

Zhang Zhiyong;Liu Xin;Huang Caixia;Wang Xianghong. H∞ Output Feedback Semi-active Control of Vehicle Seat Suspension with Parameters Uncertainty[J]. Journal of Vibration and Shock, 2013, 32(14): 93-97