An Improved Parameter Identification Method of EMA Lifting Mechanism

摘要: 针对限定记忆区间的循环最小二乘法(Limited memory interval cyclic least squares method, CLS)对电动缸举升伺服机构的非线性扰动参数辨识不精确的问题,提出了一种基于扰动解耦的限定记忆区间循环最小二乘法(Limited memory interval cyclic least squares method based on disturbance decoupling,DCLS),用于机构全行程内非线性模型和扰动参数的精确辨识拟合。首先,介绍了机构的完整和简化的动力学模型,以及非线性参数难辨识的原因;然后,分析了CLS辨识法在辨识拟合非线性扰动参数的局限性,并通过基于动平衡的不平衡力矩分离测试方法提出了DCLS辨识法;最后,基于实验平台、激励信号和辨识环路,实现了机构行程范围内的非线性模型和扰动参数精确辨识。实验结果表明:DCLS辨识法辨识系统的速度和位移响应的均方根误差相比于CLS辨识法分别下降了47.6%和48.9%。DCLS辨识法可解决CLS辨识法辨识扰动参数时的互耦合问题,为电动缸举升伺服机构的高精度建模提供参考。

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Publication Details

Journal
Journal of Mechanical Engineering
Published
2025-01-01
DOI
https://doi.org/10.3901/jme.2025.07.382
Primary Topic
Power System Optimization and Stability
Type
article
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article

An Improved Parameter Identification Method of EMA Lifting Mechanism

Journal of Mechanical Engineering
Power System Optimization and Stability
article

An Improved Parameter Identification Method of EMA Lifting Mechanism

article en

Abstract

摘要: 针对限定记忆区间的循环最小二乘法(Limited memory interval cyclic least squares method, CLS)对电动缸举升伺服机构的非线性扰动参数辨识不精确的问题,提出了一种基于扰动解耦的限定记忆区间循环最小二乘法(Limited memory interval cyclic least squares method based on disturbance decoupling,DCLS),用于机构全行程内非线性模型和扰动参数的精确辨识拟合。首先,介绍了机构的完整和简化的动力学模型,以及非线性参数难辨识的原因;然后,分析了CLS辨识法在辨识拟合非线性扰动参数的局限性,并通过基于动平衡的不平衡力矩分离测试方法提出了DCLS辨识法;最后,基于实验平台、激励信号和辨识环路,实现了机构行程范围内的非线性模型和扰动参数精确辨识。实验结果表明:DCLS辨识法辨识系统的速度和位移响应的均方根误差相比于CLS辨识法分别下降了47.6%和48.9%。DCLS辨识法可解决CLS辨识法辨识扰动参数时的互耦合问题,为电动缸举升伺服机构的高精度建模提供参考。

Journal of Mechanical EngineeringVol. 61(7)
National University of Defense Technology (CN)
Openalex Percentile: Top 58%
Power System Optimization and Stability
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An Improved Parameter Identification Method of EMA Lifting Mechanism · Journal of Mechanical Engineering (2025) | TGRS Research Map | TGRS