Ultrasonics最新文献_第7页

On the existence of local defect resonance in ultrasonic guided waves interaction with horizontal defects in plates 超声导波与板内水平缺陷相互作用时存在局部缺陷共振

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-25 DOI: 10.1016/j.ultras.2025.107912

Mingyue Zhang , Sandrine Tahina Rakotonarivo , Antonino Spada , Margherita Capriotti

The interaction of ultrasonic guided waves with defected structures gives rise to local defect resonance (LDR), which manifests in large displacements in the vicinity of the defect and affects the reflection and transmission spectra. This paper investigates the fundamental mechanism at the origin of the LDR phenomenon in isotropic elastic plates, using a hybrid computational method (Global–Local). The analyses show that the coupling of ultrasonic guided waves with the vibrational resonance modes of the sub-structure, geometrically defined by the defect, causes LDR, and boundary conditions affect it secondarily. The coupling mechanism is captured by the Global–Local method and is investigated in relation to the characteristics of the defect and the relationship to the host-structure. The coupling occurs at defect lengths that are odd multiples of the modes’ quarter wavelengths. Comparisons with analytical, finite element and methods in literature for the computation of the natural and LDR frequencies are provided. The presence of LDR and its effect on broadband reflection and transmission ultrasonic spectra away from the defected region are also verified experimentally and can be used for remote defect characterization in NDE applications. These studies clarify the fundamental understanding of LDR and provide an effective approach to capture and predict LDR in ultrasonic guided wave propagation in plate-like structures.

超声导波与缺陷结构的相互作用会产生局部缺陷共振（LDR），这种共振在缺陷附近表现为较大的位移，并影响反射和透射光谱。本文采用一种混合计算方法（全局-局部）研究了各向同性弹性板中LDR现象产生的基本机理。分析表明，超声导波与由缺陷几何定义的子结构的振动共振模态的耦合是导致LDR的主要原因，边界条件是影响LDR的次要因素。采用全局-局部方法捕获了耦合机制，并结合缺陷的特征和与主体结构的关系进行了研究。耦合发生在缺陷长度为模式四分之一波长的奇数倍处。并与解析法、有限元法和文献中计算固有频率和LDR频率的方法进行了比较。LDR的存在及其对远离缺陷区域的宽带反射和透射超声光谱的影响也得到了实验验证，并可用于无损检测应用中的远程缺陷表征。这些研究阐明了对LDR的基本认识，并为捕获和预测超声导波在片状结构中传播的LDR提供了有效的方法。

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引用次数: 0

Flexible zoom lens module with Polyhedral cylindrical linear ultrasonic Motor-Actuated transparent elastomer 柔性变焦镜头模块与多面体圆柱形线性超声电机驱动的透明弹性体

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-24 DOI: 10.1016/j.ultras.2025.107911

Zhongying Wang , Menghui Liu , Chenyu Liang , Gaoren Zhang , Hongtao Xia , Shouhua Ren , Yixin Wang , Bochao Zhang , Changsu Wang , Jian Qi , Yonggang Guo

Traditional zoom lenses employ multiple solid lens elements and electromagnetic driving mechanisms. This results in complex structures and large sizes. These limitations significantly restrict their application in compact optical systems where miniaturization is critical. To address this issue, this paper presents a flexible zoom lens module. This module is driven by a cylindrical ultrasonic motor (CYUSM). The CYUSM comprises a stator, a hollow mover, and piezoelectric ceramic (PZT) elements. It acts as a direct-drive actuator to deform a transparent elastomeric lens axially. Polydimethylsiloxane (PDMS) was selected as the optical lens material. The precise linear motion of the CYUSM dynamically controls its surface curvature. This enables continuous adjustment of the focal length. We optimized the structural parameters of the CYUSM stator and the PDMS lens using ANSYS finite element analysis. This optimization aimed to achieve modal frequency degeneracy and high electromechanical coupling efficiency. Experimental characterization of the prototype demonstrated that the CYUSM could deliver a maximum output velocity of 1.21 mm/s and a thrust force of 5.4 N (under 43.3 kHz, 200 Vp). The optical performance was evaluated using ZEMAX. The results indicated a minimum focal length of 36.5 mm for the lens module. The experimentally measured focal length trend showed high consistency with the simulation results, thereby validating the design accuracy. The module employs a coaxial hollow structure to integrate the actuator and optical path, resulting in high integration, miniaturization, self-locking, and electromagnetic interference immunity.

传统变焦镜头采用多个固体透镜元件和电磁驱动机构。这导致了复杂的结构和大尺寸。这些限制极大地限制了它们在小型化至关重要的紧凑型光学系统中的应用。为了解决这一问题，本文提出了一种柔性变焦镜头模块。该模块由圆柱形超声电机（CYUSM）驱动。CYUSM由定子、空心动器和压电陶瓷（PZT）元件组成。它作为一个直接驱动驱动器，使透明弹性透镜轴向变形。选用聚二甲基硅氧烷（PDMS）作为光学透镜材料。CYUSM的精确线性运动动态控制其表面曲率。这样可以连续调整焦距。利用ANSYS有限元分析对CYUSM定子和PDMS透镜的结构参数进行了优化。该优化旨在实现模态频率退化和高机电耦合效率。实验表征表明，CYUSM的最大输出速度为1.21 mm/s，推力为5.4 N （43.3 kHz, 200 Vp）。利用ZEMAX对其光学性能进行了评价。结果表明，最小焦距为36.5毫米的透镜模块。实验测量的焦距趋势与仿真结果具有较高的一致性，从而验证了设计的准确性。该模块采用同轴空心结构，将致动器和光路集成在一起，具有高集成度、小型化、自锁、抗电磁干扰等特点。

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引用次数: 0

Experimental observations of ultrasonic waves reflecting from and passing through a crack 超声波从裂缝反射和穿过裂缝的实验观察。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-19 DOI: 10.1016/j.ultras.2025.107898

Masahiro Suetsugu , Kaori Shirakihara , Minoru Tamiaki , Kouichi Sekino

A crack was introduced into a glass plate by applying thermal stress, and the propagation characteristics of longitudinal ultrasonic waves at this crack were observed using the photoelastic method. Waves incident on the closed crack passed through completely, and no flaw echo was observed on an A-scope display. Propagating waves with slightly open cracks were observed using a sensitive tint technique. The results indicate that the tensile phase of these waves was reflected at the crack, whereas the compressive phase was transmitted. This phenomenon is considered the principle behind the generation of harmonic waves from a crack by contact acoustic nonlinearity. Multi-cycle ultrasonic waves were visualized, and frequency analyses were performed based on the luminance distribution. Immediately after passing through the crack, a wave component with half the incident wave frequency was observed.

通过施加热应力在玻璃板上引入裂纹，利用光弹性方法观察了纵向超声波在裂纹处的传播特性。入射到闭合裂纹上的波完全通过，在a型示波器上没有观察到裂纹回波。用敏感的色调技术观察到带有轻微裂缝的传播波。结果表明，这些波的拉伸阶段在裂纹处被反射，而压缩阶段则被传播。这种现象被认为是接触声非线性导致裂纹产生谐波的原理。将多周期超声波可视化，并根据亮度分布进行频率分析。通过裂缝后，立即观察到入射波频率的一半的波分量。

引用次数: 0

Static component of nonlinear guided wave as a Preferable indicator of creep damage in superalloys 非线性导波静态分量作为高温合金蠕变损伤的较好指标。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-19 DOI: 10.1016/j.ultras.2025.107894

Peng Zheng , Xuan Li , Peng Xiao , Zihao Dong , Dazhi Cong , Lishuai Liu , Yanxun Xiang

Nonlinear ultrasonic testing based on second harmonic generation has shown promise for early-stage creep damage detection. However, its practical application is constrained by a strong dependence on mode-matching conditions and signal degradation at advanced damage stages, limiting its effectiveness in complex service environments. Additionally, traditional approaches struggle to reliably characterize microstructural evolution throughout the entire creep process, affecting the accuracy of damage evaluation. To overcome these challenges, this study introduces the static component signal (

β_{0}

) of guided wave propagation into the creep damage assessment of superalloys. This approach broadens the characterization scope of nonlinear ultrasonic responses and enhances detection stability during later creep stages. Experimental results demonstrate that the static component is largely insensitive to mode-matching conditions, with its nonlinear parameter exhibiting a stable, linear increase throughout the creep lifetime. Compared to the second harmonic parameter—which typically exhibits a nonlinear “rise-then-fall” trend—the static component shows improved robustness and practical applicability. This method effectively addresses the limitations of conventional nonlinear ultrasonic techniques for late-stage creep damage detection, offering a valuable complementary tool for structural health monitoring and life assessment of high-temperature materials.

基于二次谐波产生的非线性超声检测在早期蠕变损伤检测中具有广阔的应用前景。然而，它的实际应用受到模式匹配条件的强烈依赖和后期损伤阶段信号退化的限制，限制了它在复杂服务环境中的有效性。此外，传统方法难以在整个蠕变过程中可靠地表征微观组织演变，从而影响损伤评估的准确性。为了克服这些挑战，本研究将导波传播的静态分量信号（β0）引入高温合金蠕变损伤评估中。该方法拓宽了非线性超声响应的表征范围，提高了后期蠕变阶段的检测稳定性。实验结果表明，静态构件对模态匹配条件基本不敏感，其非线性参数在整个蠕变寿命期间呈稳定的线性增长。与二次谐波参数（通常表现出非线性的“先上升后下降”趋势）相比，静态分量显示出更好的鲁棒性和实用性。该方法有效地解决了传统非线性超声技术在后期蠕变损伤检测中的局限性，为高温材料结构健康监测和寿命评估提供了有价值的补充工具。

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引用次数: 0

Non-destructive characterization of mechanical properties using magnetostrictive magnetoacoustic conversion: Theory and experiment 磁致伸缩磁声转换力学性能的无损表征：理论与实验。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-18 DOI: 10.1016/j.ultras.2025.107900

Wenbo Cao , Bin Wu , Yuan Yuan , Zhenghong Wang , Xiang Gao , Xiucheng Liu

Mechanical properties are critical parameters of ferromagnetic materials and directly affect their structural reliability and functional stability. Ultrasonic characterization techniques based on the magnetostrictive effect have the advantages of non-contact and high sensitivity. However, the relationship between magnetoacoustic conversion efficiency (MCE) and mechanical properties lacks sufficient theoretical support and the intrinsic mechanism remains unclear. To provide theoretical support for this, a theoretical model of magnetostrictive magnetoacoustic conversion with different mechanical parameters was constructed in this study and the key factors affecting MCE were analyzed in detail for the first time. On this basis, a non-destructive characterization method of evaluating multiple mechanical parameters was developed. Finally, experimental validation was conducted with heat-treated 3Cr13 steel samples. Both theoretical and experimental results showed a significant linear correlation between the mechanical parameters and SH wave MCE curves measured with magnetostrictive transducers. The observed experimental phenomena were consistent with the predicted patterns from the model. This study enriched the magnetoacoustic conversion theory of magnetostrictive ultrasonic transducers and provided new insights into the non-contact and non-destructive characterization of mechanical properties.

力学性能是铁磁材料的关键参数，直接影响铁磁材料的结构可靠性和功能稳定性。基于磁致伸缩效应的超声表征技术具有非接触、灵敏度高的优点。然而，磁声转换效率（MCE）与力学性能之间的关系缺乏足够的理论支持，其内在机制尚不清楚。为了对此提供理论支持，本研究构建了不同力学参数下磁致伸缩磁声转换的理论模型，并首次详细分析了影响磁致伸缩磁声转换的关键因素。在此基础上，提出了一种评估多个力学参数的无损表征方法。最后用热处理后的3Cr13钢试样进行实验验证。理论和实验结果均表明，用磁致伸缩换能器测量的SH波MCE曲线与力学参数之间存在显著的线性相关。观察到的实验现象与模型预测的模式一致。该研究丰富了磁致伸缩超声换能器的磁声转换理论，为其非接触、无损的力学性能表征提供了新的见解。

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引用次数: 0

Feasibility of deep learning-based cancer detection in ultrasound microvascular images 基于深度学习的超声微血管图像癌症检测的可行性

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-15 DOI: 10.1016/j.ultras.2025.107892

Kathlyne Jayne B. Bautista , Thomas M. Kierski , Isabel G. Newsome , Hae Rim Lee , Wesley R. Legant , David S. Lalush , Paul A. Dayton

Acoustic angiography is a superharmonic contrast-enhanced ultrasound modality that maps 3-D microvasculature with fine spatial resolutions and has demonstrated potential to improve disease detection. However, the application of acoustic angiography for cancer detection currently faces challenges. Quantitative analysis relies on time-consuming, manual segmentation of individual vessels, and inter-operator variability limits reader-based discrimination. This feasibility study aims to address the limitations of current approaches with deep learning for efficient and accurate detection of tumor-associated vasculature in vivo and to validate against quantitative methods that evaluate vascular morphology. Convolutional neural networks (CNNs), namely EfficientNet, ResNet, and DenseNet, were trained on a newly collected dataset of acoustic angiography volumes (n = 195 with 98 controls and 97 tumors) in rodents using a nested cross-validation study. The best performing model, 3-D EfficientNet-B0, achieved a mean classification accuracy of 0.928 ± 0.034 with high sensitivity and specificity, comparable to previously published results. Comparison with quantitative methods in tumor cases showed correlation between high network attention regions and morphological features typically associated with malignant vessels, including increased density and tortuosity. These results highlight the efficiency and accuracy of end-to-end CNNs for tumor detection in acoustic angiography volumes, validated by known markers of malignancy.

超声血管造影术是一种超谐波增强超声成像技术，它能以精细的空间分辨率绘制三维微血管，并已证明有潜力改善疾病检测。然而，超声血管造影在癌症检测中的应用目前面临着挑战。定量分析依赖于耗时的单个血管的人工分割，操作人员之间的可变性限制了基于读者的区分。这项可行性研究旨在解决当前深度学习方法的局限性，以有效和准确地检测体内肿瘤相关血管，并验证评估血管形态的定量方法。卷积神经网络（cnn），即高效神经网络（EfficientNet）、ResNet和DenseNet，采用巢式交叉验证研究方法，在新收集的啮齿动物声学血管造影体积数据集（n = 195, 98个对照组和97个肿瘤）上进行训练。表现最好的3-D EfficientNet-B0模型的平均分类准确率为0.928±0.034，具有较高的灵敏度和特异性，与先前发表的结果相当。与肿瘤病例的定量方法比较发现，高网络注意区与典型的恶性血管相关的形态学特征相关，包括密度增加和扭曲。这些结果强调了端到端cnn在声学血管造影体积中检测肿瘤的效率和准确性，并得到了已知恶性肿瘤标志物的验证。

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引用次数: 0

Looseness monitoring of Multi-Bolt connection using acoustic emission 多螺栓连接松动的声发射监测。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-15 DOI: 10.1016/j.ultras.2025.107895

S.A. Hoseini Sabzevari , M.H. Jalal Kamali

A novel approach based on low sampling rate data is proposed to detect early-stage bolt looseness in structural joints. This study investigates how bolt loosening affects the acoustic emission signal in a multi-bolt connection using low sampling rates. Utilizing a low sampling rate sensor enables continuous and cost-effective structural health monitoring. To validate the method, an experimental set-up was conducted on carbon steel plates fastened with M8 bolts. The proposed technique consists of two main stages. First, the effect of bolt loosening in a single-bolt joint on acoustic signals is analyzed. Second, various bolt loosening configurations are examined in a linear three-bolt setup. The influence of different permutations of bolt looseness in the linear arrangement on the final results is also discussed. The results indicate that even in the presence of fully tightened bolts capable of transmitting stress waves, the initiation of loosening can be successfully detected using time–frequency domain features combined with support vector machine (SVM) classification. Experimental results demonstrate that the proposed method achieves an accuracy of 97.53 % in detecting early-stage bolt looseness. The findings highlight the method’s potential as a practical and scalable solution for improving the safety and reliability of bolted connections in industrial applications.

提出了一种基于低采样率数据的结构节点螺栓早期松动检测方法。本文研究了低采样率下螺栓松动对多螺栓连接声发射信号的影响。利用低采样率传感器可以实现连续和经济高效的结构健康监测。为了验证该方法，在M8螺栓紧固的碳钢板上进行了实验设置。所提出的技术包括两个主要阶段。首先，分析了单螺栓连接中螺栓松动对声信号的影响。其次，在线性三螺栓设置中检查各种螺栓松动配置。讨论了线形布置中螺栓松动的不同排列对最终结果的影响。结果表明，即使在完全拧紧的螺栓能够传播应力波的情况下，使用时频域特征结合支持向量机（SVM）分类也可以成功地检测到松动的开始。实验结果表明，该方法检测螺栓早期松动的准确率为97.53%。该研究结果强调了该方法作为一种实用且可扩展的解决方案的潜力，可以提高螺栓连接在工业应用中的安全性和可靠性。

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引用次数: 0

A theoretical model for predicting the ultrasonic signals in cylindrical waveguide generated by EMATs 一种预测emat产生的圆柱波导超声信号的理论模型。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-15 DOI: 10.1016/j.ultras.2025.107887

Xi Li, Zhichao Li, Shujuan Wang, Runjie Yang, Ce Li

Developing a numerical model that accurately predicts ultrasonic signals in cylinders without relying on the finite element (FE) method can significantly improve computational efficiency. However, existing models capable of predicting received ultrasonic signals by electromagnetic acoustic transducers (EMATs) in cylindrical structures remain limited. To address this gap, this paper presents a theoretical model for predicting ultrasonic signals in finite-length cylinders excited by EMATs. The model comprehensively incorporates the entire EMAT operation process, including the excitation, propagation, and reception of ultrasonic waves. Analytical expressions of the trailing pulses are first derived based on the Pochhammer–Chree theory, revealing that these pulses originate from the superposition of guided waves. Subsequently, a numerical model is developed to calculate the time-domain signals received by EMATs through modal analysis. The effectiveness and accuracy of the proposed model are validated through comparisons with FE simulations and experimental results. The findings demonstrate that the model can accurately predict the ultrasonic wave modes and key signal characteristics, including waveform, amplitude, and trailing-wave periodicity, under varying EMAT parameters. This study provides a fast and accurate approach for predicting and interpreting ultrasonic responses generated and received by EMATs in cylindrical structures.

建立一种不依赖有限元法准确预测缸内超声信号的数值模型可以显著提高计算效率。然而，现有的能够预测圆柱形结构中电磁声换能器（EMATs）接收的超声波信号的模型仍然有限。为了解决这一问题，本文提出了一个理论模型来预测有限长度圆柱体中由emat激发的超声信号。该模型综合考虑了EMAT的整个工作过程，包括超声波的激发、传播和接收。首先根据波查哈默-克里理论推导了尾随脉冲的解析表达式，揭示了这些脉冲源于导波的叠加。随后，通过模态分析，建立了EMATs接收时域信号的数值模型。通过与有限元模拟和实验结果的比较，验证了该模型的有效性和准确性。结果表明，该模型能够准确预测不同EMAT参数下的超声波形模式和关键信号特征，包括波形、幅值和尾波周期。该研究提供了一种快速准确的方法来预测和解释圆柱形结构中emat产生和接收的超声波响应。

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引用次数: 0

Assessing myocardial stiffness with transient elastography using catheter-compatible miniature actuator 用导管兼容微型驱动器瞬态弹性成像评估心肌刚度

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-14 DOI: 10.1016/j.ultras.2025.107893

Samuel M.A. Morais , Andrei B. Karpiouk , Donald J. VanderLaan , Muralidhar Padala , Stanislav Y. Emelianov

This study presents a proof-of-concept miniaturized transient elastography (TE) framework for measuring myocardial elasticity during catheter-based cardiac procedures. Recognizing that mechanical properties of myocardial tissue, particularly the shear modulus, offer valuable insight into the development and progression of cardiovascular conditions such as heart failure, we propose a TE system that can be integrated into existing intracardiac catheters. A miniature (2 mm × 2 mm) piezoelectric actuator was used to generate longitudinal shear waves (LSWs) in tissue-mimicking phantoms with varying shear moduli levels and in ex vivo porcine heart tissue. For validation, an ultrasound array transducer was used in this study to visualize the propagation of the LSWs generated by the actuator. Spatiotemporal displacement maps were analyzed to estimate shear wave speeds and corresponding shear moduli, with TE results showing strong agreement with values obtained using conventional acoustic radiation force-based shear wave elasticity imaging (SWEI). The TE and SWEI measurements showed no statistically significant differences. Ex vivo tissue measurements performed in different orientations relative to myocardial fiber direction confirmed the system’s sensitivity to tissue anisotropy. Additionally, the technique successfully distinguished between fresh and fixed heart tissue, detecting a noticeable increase in stiffness due to preservation. These findings support the feasibility of a catheter-integrated TE device as a functional extension of existing clinical workflows, offering quantitative assessment of myocardial elasticity during routine catheterization procedures.

本研究提出了一种概念验证的小型化瞬态弹性成像（TE）框架，用于测量导管心脏手术期间的心肌弹性。认识到心肌组织的力学特性，特别是剪切模量，为心力衰竭等心血管疾病的发展和进展提供了有价值的见解，我们提出了一种可以集成到现有心内导管中的TE系统。采用微型（2mm × 2mm）压电致动器在不同剪切模量的模拟组织模型和离体猪心脏组织中产生纵向剪切波（LSWs）。为了验证，在本研究中使用了超声波阵列换能器来可视化执行器产生的lsw的传播。通过分析时空位移图来估计剪切波速和相应的剪切模量，TE结果与传统的基于声辐射力的剪切波弹性成像（SWEI）得到的结果非常吻合。TE和SWEI测量结果无统计学差异。在相对于心肌纤维方向的不同方向上进行的离体组织测量证实了该系统对组织各向异性的敏感性。此外，该技术成功地区分了新鲜和固定的心脏组织，检测到由于保存而明显增加的硬度。这些发现支持导管集成TE设备作为现有临床工作流程的功能扩展的可行性，在常规导管置入过程中提供心肌弹性的定量评估。

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引用次数: 0

Low-voltage traveling wave rotary ultrasonic motor based on piezoelectric bimorph 基于压电双晶片的低压行波旋转超声电机。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-13 DOI: 10.1016/j.ultras.2025.107890

Lin Yang, Jie Zhang, Yue Xiong, Xinwei Hong, Zhuping Lan, Ait Benali Nada, Huafeng Li

To solve the problem of high driving voltage of traditional traveling wave rotary ultrasonic motor (TRUM), a low-voltage traveling wave rotary ultrasonic motor is proposed by using a piezoelectric bimorph. First, the whole structure of the motor is proposed, the principle of low-voltage drive is revealed, and the arrangement of the piezoelectric bimorph is designed. Secondly, the finite element (FE) simulation of the stator and the whole machine is carried out to study the influence of different conditions on the output performance of the motor. Finally, a prototype is made and an experimental platform is built to verify the feasibility and correctness of the design. The research results indicate that this design retains the advantages of traditional structures while also possessing the advantages of low-voltage driving.

针对传统行波旋转超声电机（TRUM）驱动电压高的问题，提出了一种采用压电双晶片的低压行波旋转超声电机。首先，提出了电机的整体结构，揭示了低压驱动的原理，并设计了压电双晶片的布置。其次，对定子及整机进行有限元仿真，研究不同工况对电机输出性能的影响。最后，制作了样机并搭建了实验平台，验证了设计的可行性和正确性。研究结果表明，该设计既保留了传统结构的优点，又具有低压驱动的优点。

引用次数: 0