用可变带宽扩展状态观察器进行故障检测和容忍控制,用于具有一次性干扰和测量噪声的电液伺服系统
Xing Ren1, Qing Guo2, Tieshan Li3
1School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
ISA transactions
|April 26, 2025
概括
本研究引入了一种新的故障检测和控制方法,用于电液伺服系统 (EHSS) 经历执行器部分失效 (LOE). 该方法确保了系统稳定性和性能恢复,尽管存在不确定性和干扰.
科学领域:
- 控制工程 控制工程 控制工程
- 机器人技术 机器人技术 机器人技术
- 机械系统 机械系统
背景情况:
- 电液伺服系统 (EHSS) 在许多工业应用中至关重要.
- 执行器故障,例如部分有效性损失 (LOE),可以显著降低EHSS的性能和安全性.
- 现有的故障检测和宽容控制方法经常与参数不确定性,外部干扰和测量噪声作斗争.
研究的目的:
- 开发一种新的故障检测和宽容控制策略,用于执行器部分LOE的EHSS.
- 为了应对参数不确定性,外部干扰和输出测量噪声所带来的挑战.
- 为了提高EHSS在执行器故障后的强度和性能恢复.
主要方法:
- 一个新的映射功能和一个可变带宽扩展状态观察器 (VBESO) 被设计用于状态和干扰估计.
- VBESO将故障组件与一次性干扰脱,提高了故障检测的准确性.
- 开发了一个具有时间变化的增益的自适应定律,以近似执行器LOE系数,从而实现稳定的故障检测.
主要成果:
- 拟议的VBESO有效地估计系统状态和干扰,同时平衡精度和噪声灵敏度.
- 适应性定律准确地接近执行器的LOE系数,从而产生稳定且强大的故障检测方案.
- 集成的耐故障控制器可确保高跟踪精度和在执行器故障后快速恢复性能.
结论:
- 新的故障检测和容忍控制方法有效地处理在各种不利条件下在EHSS中的执行器部分LOE.
- VBESO的协调设计,适应性规律和时间变化的增益提供了一个独特而有效的解决方案.
- 与现有方法相比,模拟和实验验证证证了该方法的优越性能.
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