考虑输入和输出约束的主动悬架系统自适应容错控制
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作者单位:

河海大学

作者简介:

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中图分类号:

TP273

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Adaptive fault-tolerant control of active suspension systems with input and output constraints
Author:
Affiliation:

Hohai University

Fund Project:

National Natural Science Foundation of China,The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    本文针对具有约束的不确定主动悬架系统(ASS), 提出了一种考虑输入和输出约束的自适应容错控制方案. 首先, 设计了一个有界约束函数来同时约束车身和轮胎的垂向位移, 以实现驾驶舒适度与轮胎抓地力之间的平衡. 其次, 为了进一步提高驾驶舒适度, 针对不确定车身子系统, 提出了一种考虑输入约束的自适应容错控制律, 并与设计的有界约束函数进行叠加, 得到了最终的控制律. 其中, 考虑到执行器故障及ASS不确定性带来的未知项, 采用自适应控制来逼近未知项的上界, 同时, 引入辅助系统对输入饱和进行补偿. 最终, 分析了ASS的稳定性, 并通过仿真对比验证了本文提出方案的有效性.

    Abstract:

    In this paper, an adaptive fault-tolerant control scheme considering input and output constraints for uncertain active suspension system (ASS) with constraints is proposed. Firstly, a bounded constraint function is designed to constrain both the vertical displacement of the car-body and the tire in order to achieve a balance between ride comfort and tire grip. Secondly, to further improve the ride comfort, an adaptive fault-tolerant control law considering input constraint is proposed for the uncertain car-body subsystem, and the final control law is obtained by adding the bounded constraint function. Considering the unknown term caused by actuator fault and ASS uncertainties, adaptive control is adopted to approach its upper bound. Meanwhile, the auxiliary system is introduced to compensate for input saturation. Finally, the stability of the ASS is analysed and the effectiveness of the proposed scheme is verified by simulation.

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历史
  • 收稿日期:2023-12-28
  • 最后修改日期:2024-06-11
  • 录用日期:2024-06-22
  • 在线发布日期: 2024-07-04
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