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arXiv 2501.04793eess.SYcs.SY
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一种用于LuGre摩擦估计与控制的新型观测器设计

A Novel Observer Design for LuGre Friction Estimation and Control

Caner Odabaş, Ömer Morgül

AI总结:

针对LuGre摩擦补偿难题,本文提出一种简单独立、可配合任意控制输入的新型观测器,利用速度及速度误差估计摩擦,并通过Lyapunov分析与仿真验证其稳定性和跟踪性能提升。

摘要:

摩擦的动态分量可能直接影响运动控制系统的稳定性和性能。LuGre模型是用于表达这种动态行为的一种常用摩擦模型。由于LuGre模型非常全面,基于它进行摩擦补偿可能具有挑战性。受此启发,我们开发了一种新型观测器来估计和补偿LuGre摩擦。此外,我们给出了Lyapunov稳定性分析,以表明观测器动态在特定条件下是渐近稳定的。与同类方法相比,所提出的观测器构成了一种简单且独立的方案,能够以直接的方式与任意控制输入一起使用。作为主要区别,所提出的观测器估计速度,并在控制输入之外利用速度误差来估计摩擦。大量仿真表明,所引入的观测器在存在摩擦的情况下提高了位置和速度跟踪性能。

英文摘要:

Dynamic components of the friction may directly impact the stability and performance of the motion control systems. The LuGre model is a prevalent friction model utilized to express this dynamic behavior. Since the LuGre model is very comprehensive, friction compensation based on it might be challenging. Inspired by this, we develop a novel observer to estimate and compensate for LuGre friction. Furthermore, we present a Lyapunov stability analysis to show that observer dynamics are asymptotically stable under certain conditions. Compared to its counterparts, the proposed observer constitutes a simple and standalone scheme that can be utilized with arbitrary control inputs in a straightforward way. As a primary difference, the presented observer estimates velocity and uses the velocity error to estimate friction in addition to control input. The extensive simulations revealed that the introduced observer enhances position and velocity tracking performance in the presence of friction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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