压电微定位系统的无模型自适应预测控制
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北京林业大学 工学院,北京

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北京市科技新星计划交叉合作课题(20230484399);国家自然科学基金(52475596);北京市自然科学基金-小米创新联合基金(L243022)


Model-Free Adaptive Predictive Control of Piezoelectric Micropositioning Systems
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    摘要:

    针对当前微纳米定位系统存在的操作复杂和控制精度不足的问题,提出了一种基于半实物实时仿真控制平台的无模型自适应预测控制方案。为了克服传统实验平台适应性差的问题,结合Real-Time实时仿真环境与数据采集工具箱,并利用激光测距仪和电压放大器等设备,搭建了一个具备实时数据交换功能的控制平台,从而显著提升了实验系统的通用性和灵活性。在控制方面,针对传统离线模型未能充分考虑动态非线性影响的局限性,提出了无模型自适应控制方案,并引入预测控制技术,旨在有效解决频率相关的迟滞非线性问题,进而实现实时轨迹跟踪功能。实验结果表明,无模型自适应预测控制算法可以快速且精确地跟踪给定位移,调节时间小于1.5ms,跟踪精度保持在1.3μm以内。

    Abstract:

    Aiming to address the issues of complicated operation and insufficient control accuracy in current micro-nanopositioning systems, a model-free adaptive predictive control scheme based on a semi-physical real-time simulation control platform is proposed. To overcome the limitations of poor adaptability in traditional experimental platforms, a control platform with real-time data exchange functionality is developed by integrating a real-time simulation environment with a data acquisition toolbox and utilizing equipment such as a laser range finder and a voltage amplifier. This significantly enhances the versatility and flexibility of the experimental system. In terms of control, to overcome the limitation that traditional offline models fail to fully account for the influence of dynamic nonlinearity, a model-free adaptive control scheme is proposed, and predictive control technology is introduced. This approach effectively addresses the frequency-dependent hysteresis nonlinearity problem, enabling real-time trajectory tracking. Experimental results show that the model-free adaptive predictive control algorithm can quickly and accurately track a given displacement, with a settling time of less than 1.5ms, and the tracking accuracy remains within 1.3μm.

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曹婷,谭月胜.压电微定位系统的无模型自适应预测控制计算机测量与控制[J].,2025,33(12):118-127.

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  • 收稿日期:2024-12-04
  • 最后修改日期:2025-01-05
  • 录用日期:2025-01-06
  • 在线发布日期: 2025-12-24
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