东篱科研大数据发现系统（DRDS）

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Effects of anti-symmetric nonlinear viscous damping on the force transmissibility of multi-degree of freedom structures

ISSN号：2095-0349
期刊名称：《力学快报：英文版》
时间：0
分类：TP273[自动化与计算机技术—控制科学与工程;自动化与计算机技术—检测技术与自动化装置] TM274[电气工程—电工理论与新技术;一般工业技术—材料科学与工程]
作者机构：[1]上海交通大学机械系统与振动国家重点实验室,上海200240
相关基金：国家自然科学基金资助项目（No.11172169,11125209）;机械系统与振动国家重点实验室重点基金资助项目（No.MSVZD201102）;上海航天基金资助项目（No.HTJ10-08）

关键词：超磁致伸缩驱动器, 磁滞, Prandtl—Ishlinskii模型, 逆模型, 实时补偿, giant magnetostrietive actuator , hysteresis , Prandtl-Ishlinskii（PI） operator , inverse mod- el, real-time compensation

中文摘要：

摘要：针对超磁致伸缩驱动器（GMA）存在复杂的磁滞非线性易降低系统性能，导致系统不稳定的问题，建立了可以精确描述磁滞现象的模型并提出了合适的驱动控制方法。首先，基于Prandtl—Ishlinsii（PI）模型对GMA磁滞建模，并采用最小均方法（LMS）进行模型参数辨识，模型预测误差为0．0379μm。接着，通过对PI模型解析求逆进行实时补偿控制，从而有效减小磁滞误差，补偿控制误差为0．309μm。实验结果证明，PI模型可以精确描述GMA磁滞现象，且具有计算简单，磁滞跟踪能力强的优点。基于该模型的实时磁滞补偿控制方法可以有效减小磁滞误差，提高GMA实时驱动定位控制精度，是实现GMA精密驱动控制的一种有效方法。

英文摘要：

Giant Magnetostrictive Actuator （GMA） has complex hysteretic nonlinearities, which can degrade system performance and cause system instability. To solve the problem, this paper establi- shes a model to accurately describe hysteretic phenomenon and propose a proper method to improve re- al-time control accuracy. Firstly, Prandti-Ishlinskii（PI） operator is proposed in this paper to model the hysteresis of GMA and Least Mean Square（LMS） algorithm is used identify the parameter of this model, by which the prediction error reaches up to 0. 037 9 μm. Then, an inverse model is established based on the PI model for real-time compensation control of the hysteresis, and the inverse control er- ror reaches up to 0. 309 μm. The experimental results demonstrate that PI operator can accurately characterize the GMA hysteresis, and the model has advantages of simple calculation and strong hys- teretic tracking ability. The reabtime compensation control of hysteresis can effectively reduce hyster-etic errors and improve real-time control accuracy. It is a effective way to achieve precision driving control of GMAs.