Compact neural network-enhanced synthesis of a novel decoupled 2-DOF tilt stage based on graded auxetic and contracting honeycomb

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-20 DOI:10.1016/j.tws.2026.114697

Tingting Ye , Zhao Feng , Yangmin Li

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引用次数: 0

Abstract

Given the increasing demands for large strokes with low coupling for micro/nanomanipulation, a novel compact tilt stage is proposed based on the graded auxetic metamaterial to provide two degrees-of-freedom (DOFs) rotation motions in this paper. Firstly, graded auxetic and contracting structured honeycombs are designed with parallel combinations to provide amplified displacements driven by piezoelectric stacks, applying the orthogonal layering configuration with spatial distribution to alleviate rotation coupling. Compared with other tilt stages, larger rotation stroke and lower rotation coupling are yielded with compact dimension, attributed to intensive honeycomb structures. Then, the attention mechanism is involved in a compact neural network model to predict boundary conditions of the elliptical integral model, improving accuracy and simplifying derivation. Through sensitivity analysis and parametric optimization, the structural parameters are determined. To validate the effectiveness of design and modeling, the prototype of the proposed 2-DOF tilt stage is fabricated with the volume of 29*29*32 mm

^{3}

. Experimental results show the rotation strokes of 17.98 and 18.82 mrad, with the coupling ratio of 0.46% and 0.45%, respectively.

Abstract Image

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基于梯度渐缩蜂窝的新型解耦二自由度倾斜平台的紧凑神经网络增强综合

针对微纳操作对大冲程、低耦合的需求日益增长，提出了一种基于梯度形变超材料的紧凑倾斜工作台，可提供两自由度的旋转运动。首先，采用空间分布的正交分层结构减轻旋转耦合，采用并联组合设计梯度伸缩和收缩结构蜂窝，以提供压电堆驱动下的放大位移；与其他倾斜阶段相比，由于密集的蜂窝结构，其旋转行程更大，旋转耦合更小，尺寸更紧凑。然后，将注意力机制引入到一个紧凑的神经网络模型中，预测椭圆积分模型的边界条件，提高了精度，简化了推导过程。通过灵敏度分析和参数优化，确定了结构参数。为了验证设计和建模的有效性，制作了体积为29*29*32 mm3的二自由度倾斜平台原型。实验结果表明，旋转行程分别为17.98和18.82 mrad，耦合比分别为0.46%和0.45%。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.