在添加史密斯预测器后,对磁铁轨车辆系统的时间延迟悬浮控制系统的动态冲击分析
Yang Feng1, Chunfa Zhao1, Laisheng Tong2
1State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China.
ISA transactions
|September 14, 2024
概括
电磁悬挂马格莱夫车辆的时间延迟导致不稳定. 集成史密斯预测器 (SP) 通过补偿时间延迟来稳定系统,其最小有效值对性能至关重要.
科学领域:
- 控制系统工程 控制系统工程
- 运输工程 运输工程
- 机械电子学是什么意思 机械电子学
背景情况:
- 电磁悬挂 (EMS) 磁力车辆悬浮控制系统的时间延迟 (TD) 对动态性能和稳定性产生了重大影响.
- 过度的TD可能导致悬浮不稳定,需要有效的缓解策略.
研究的目的:
- 为了研究将史密斯预测器 (SP) 集成到比例整合导数 (PID) 悬浮控制系统中,以减轻时间延迟问题.
- 为了分析时间延迟悬浮控制系统与内置的SP的稳定性.
主要方法:
- 使用理论分析和数值模拟来评估系统稳定性.
- 该研究研究了SP集成对系统特征方程的根轨迹的影响.
- 确定了延迟补偿的最小有效值 (MEV),并与系统的稳定区域相关联.
主要成果:
- 理论分析证实,超过关键的TD值会使悬浮系统变得不稳定.
- 史密斯预测器有效地改变了根的轨迹,恢复了悬浮系统的稳定性.
- 对于更复杂的系统和更高的车辆速度,需要更大的MEV来补偿TD,对于给定的模拟参数 (15 ms TD,160 km/h) 确定了12 ms的具体MEV.
结论:
- 史密斯预测器是稳定受时间延迟影响的EMS磁悬浮控制系统的有效方法.
- 史密斯预测器中时间延迟补偿的最小有效值是一个直接影响系统稳定性和性能的关键参数.
- 系统的复杂性和运行速度显著影响所需的时间延迟补偿,突出了对自适应控制策略的需求.
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