Mechanical Systems and Signal Processing最新文献

{"title":"Theoretical analysis and experimental research on control performance of active tuned liquid damper","authors":"Hao-ding Sun,&nbsp;Hao-xiang He,&nbsp;Yang Cheng,&nbsp;Xiao-jian Gao","doi":"10.1016/j.ymssp.2025.112440","DOIUrl":"10.1016/j.ymssp.2025.112440","url":null,"abstract":"<div><div>Aiming at the shortcomings of the damping performance of the traditional tuned liquid damper (TLD), a damping technology scheme that organically combines the TLD with the active control device is proposed to form an active tuned liquid damper (ATLD) based on the sliding mode control algorithm. Based on the intensive analysis of ATLD damping characteristics, the ATLD-single degree of freedom structural mechanics model is established according to the composite damping of the structure by the active control force and the passive control force of TLD. To verify the accuracy of the theoretical mechanical model of ATLD and to investigate the effects of structural period and seismic site category on the real damping performance of ATLD, three different period single-degree-of-freedom steel framework test models are adopted to complete the seismic simulation shaking table tests. The sliding-mode control algorithm with a steep saturation function is proposed to eliminate the structural jitter effect. The dynamic test and theoretical results show that the numerical calculation results and the test results have good agreement in terms of the peak displacement and the root mean square. The introduction of an active control device into TLD can significantly improve the seismic performance of traditional TLD. ATLD can produce an excellent seismic control effect on the controlled structure under all kinds of site conditions, and the damping effect is better with the increase of the site category. ATLD is more suitable for medium and high-rise buildings, and it has a good prospect for engineering applications.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":""},"PeriodicalIF":7.9,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase-based motion analysis for high-precision measurement of bridge deflection using drone imagery","authors":"Jiaxing Ye,&nbsp;Shien Ri","doi":"10.1016/j.ymssp.2025.112433","DOIUrl":"10.1016/j.ymssp.2025.112433","url":null,"abstract":"<div><div>Recent advancements in unmanned aerial vehicles (drones) technology have significantly broadened the avenue for enhancing the ability to perform precise deflection measurements for bridges using aerial imagery. Utilizing drones for such purposes offers numerous advantages, such as enabling access to hard-to-reach areas, superior cost efficiency, a simplified process in onsite inspection preparation, and the prospective feature of automation. This study delves into the core technique for achieving high-precision deflection measurement of bridges through the analysis of drone imagery data. Unlike conventional studies that typically adopt an approach focusing on image stabilization, we develop a novel method from an orthogonal perspective by reformulating the problem through motion analysis. The proposed method is specifically designed to disentangle the geometrical movements caused by drone motion from the actual structural displacement of the bridge, thereby isolating and accurately capturing the bridge’s deflection characteristics. Extensive validation analysis demonstrated the proficiency of the proposed scheme, showcasing its superior precision, reduced computational cost, and robust performance to environmental factors. The proposed approach has broad applicability for automated inspection of aging and critical infrastructures using drones, addressing sustainability and resilience challenges crucial to global society. © 2024 Elsevier Science. All rights reserved.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":""},"PeriodicalIF":7.9,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-inspired structures for energy harvesting self-powered sensing and smart monitoring","authors":"Yingxuan Cui ,&nbsp;Hongchun Luo ,&nbsp;Tao Yang ,&nbsp;Weiyang Qin ,&nbsp;Xingjian Jing","doi":"10.1016/j.ymssp.2025.112459","DOIUrl":"10.1016/j.ymssp.2025.112459","url":null,"abstract":"<div><div>In recent years, with the advancements in the Internet of Things (IoT) and wireless networks, various bioinspired energy harvesters and self-powered sensors have been utilized in intelligent monitoring systems to enhance environmental adaptability, reduce energy consumption, and minimize maintenance costs. Most of these systems draw inspiration from the nonlinear characteristics found in biological structures. The primary contribution of this work lies in providing a comprehensive overview of recent bioinspired structural energy harvesters, self-powered sensors, and their potential for monitoring applications. The bioinspired structures can be inspired by plants, birds, fish, arthropods, and even humans. Based on fundamental theories and design principles, bioinspired energy harvesters are proposed and categorized from the transducer perspective, encompassing electromagnetic, piezoelectric, triboelectric, and hybrid generation mechanisms. Furthermore, mechanical perspectives are offered on bio-inspired nonlinear energy harvesting methods, encompassing multi-directional, multi-stable, and vibration isolation energy harvesting integration, along with representative designs and performance analyses for each bioinspired energy harvester. Additionally, several bioinspired sensors are introduced, which excel in sensitivity, durability, and self-powering capabilities, thereby catering to diverse sensing needs across various environments and application scenarios. Smart monitoring relies heavily on efficient energy harvesters and highly reliable self-powered sensors, playing a pivotal role in diverse fields related to human production practices. The review concludes by summarizing resolved issues, outlining future challenges, and offering prospects for the future. This article aims to provide a comprehensive overview of bioinspired energy harvesting, self-powered sensing, and intelligent monitoring, thereby guiding the application of novel bioinspired structures in the realm of intelligent monitoring.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112459"},"PeriodicalIF":7.9,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized design of auxetic substrates for enhanced electric power output in piezoelectric composites","authors":"Han Yan ,&nbsp;Yi Zhang ,&nbsp;Weizhong Jiang ,&nbsp;Wan Hong ,&nbsp;Yuanlong Wang ,&nbsp;Yimin Xie ,&nbsp;Jingbo Sun ,&nbsp;Xin Ren","doi":"10.1016/j.ymssp.2025.112428","DOIUrl":"10.1016/j.ymssp.2025.112428","url":null,"abstract":"<div><div>Auxetics, characterized by their unique deformation behavior, possess the potential to improve the electric power output of piezoelectric composites utilized in energy harvesting applications. This study investigates the effects of different two-dimensional auxetic substrates on piezoelectric composites and assesses the suitable environments for each type of auxetic piezoelectric composite. Additionally, this research proposes a three-dimensional auxetic substrate with the characteristics of compression-torsion coupling structures. This innovative three-dimensional auxetic substrate not only retains the advantages of two-dimensional auxetic substrates, but also enables the piezoelectric composites to engage both the 31, 32 and 33 modes of piezoelectric materials in the d₃₃ operating mode for electric power generation. The performance of three-dimensional auxetic piezoelectric composites is evaluated using finite element (FE) modelling, with the findings validated through experiments. Experimental results demonstrate that the output voltage and power generated by three-dimensional auxetic piezoelectric composites can reach 4.99 times and 24.92 times, respectively, that of ordinary piezoelectric composites in the d₃₃ operating mode. This study further corroborates the advantages of employing auxetic substrates in piezoelectric composites and provides significant insights for future research endeavors.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112428"},"PeriodicalIF":7.9,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous measurement of thickness and bulk wave velocities of thin plates using laser-excited local ultrasonic resonances","authors":"Yehai LI ,&nbsp;Zhengyue GUO ,&nbsp;Yi HE ,&nbsp;Kai WANG ,&nbsp;Zhongqing SU ,&nbsp;Shifeng GUO","doi":"10.1016/j.ymssp.2025.112442","DOIUrl":"10.1016/j.ymssp.2025.112442","url":null,"abstract":"<div><div>Ultrasonic characterization techniques have been widely used for plates or plate-like structures in industrial applications and research development. Complex real situations pose challenges to the existing methods, such as <em>in-situ</em> measurement for fast and in-service evaluation, simultaneous determination of thickness and wave velocity when both variables are uncertain, multi-mode characterization for complete elastic properties, and local measurement for inhomogeneous variations. This study is based on non-contact laser ultrasound, utilizing the wideband characteristics to obtain the multi-mode local ultrasonic resonance spectrum of thin plates, including bulk wave-based thickness resonance modes and zero-group-velocity (ZGV) Lamb wave resonance modes. Firstly, theoretical solutions of local ultrasonic resonances are obtained in the dimensionless form with Poisson’s ratio as the only variable. Secondly, a modified least-square minimization algorithm is used to search the theoretical solutions with multiple experimental resonant frequencies. Then, Poisson’s ratio and relative wave velocities with respect to the thickness can be calculated. Finally, the spatial distribution of the first ZGV mode is measured by limited local scanning around the excitation spot. Through matching the theoretical wavefield pattern, the thickness is obtained and wave velocities are decoupled. This method can be applied to thin structures with only single-side access. The local scanning range required is no more than one wavelength of the first ZGV mode or twice the thickness for most usual materials, rendering local measurement for thin structures. The influence of the spot size of the excitation laser is discussed theoretically and experimentally. Such a method can be used to image the non-uniform thickness and elastic properties, such as localized plastic deformation.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112442"},"PeriodicalIF":7.9,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repetitive transient impact detection and its application in cross-machine fault detection of rolling bearings","authors":"Xin Kang,&nbsp;Junsheng Cheng,&nbsp;Yu Yang,&nbsp;Feng Liu","doi":"10.1016/j.ymssp.2025.112422","DOIUrl":"10.1016/j.ymssp.2025.112422","url":null,"abstract":"<div><div>This paper aims to develop a rolling bearing fault detection method that can be directly applied to unseen domains, addressing the limitations of current transfer learning methods, include the dependency on target domain data for domain adaptation methods and the lack of interpretability for domain generalization methods. Inspired by the intrinsic indicator of rolling bearing fault, i.e, repetitive transient impact phenomenon, a detector for this phenomenon is proposed and applied to fault detection. First, to preserve and highlight the transient impact phenomenon in signals, a time–frequency transformation hyperparameter selection strategy suitable for any sampling frequency, bearing type, and operating condition is proposed. Next, a universal nonlinear processing method that decouples diagnostic results from signal energy is designed and applied to the obtained spectrogram to ensure that the model focuses on capturing transient impact phenomenon rather than signal energy (which varies across different machines). Finally, we design a clean and interpretable CNN architecture to avoid overfitting and conduct visual analysis to verify its interpretability. The model trained on a single dataset is tested directly on three completely unseen datasets, confirming the method’s remarkable ability for cross-machine, cross-sampling frequency, cross-operational condition, and cross-transmission path detection of rolling bearing faults. Additionally, we provided detailed visual validation for the proposed hyperparameter selection strategy and nonlinear processing method. Source code is available at: <span><span>https://github.com/kangxin8/Repetitive-transient-impact-detector/tree/master</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112422"},"PeriodicalIF":7.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-channel adjoint least mean square algorithm with momentum factor applied on active noise control","authors":"Xiaoyi Shen ,&nbsp;Yu Guo ,&nbsp;Junwei Ji ,&nbsp;Dongyuan Shi ,&nbsp;Woon-Seng Gan","doi":"10.1016/j.ymssp.2025.112415","DOIUrl":"10.1016/j.ymssp.2025.112415","url":null,"abstract":"<div><div>Active noise control (ANC) is extensively utilized to attenuate unwanted environmental noise, creating a more conducive environment for work and daily activities. Traditional approaches face challenges when scaled to larger areas using multi-channel ANC (McANC) due to escalating computational burden and slower convergence speeds as channel numbers increase. To overcome these limitations, we introduce a multi-channel adjoint least mean square algorithm with a momentum factor (Mom-McALMS) designed to achieve optimal control at steady-state while reducing computational demands and accelerating convergence. Furthermore, the theoretical analysis presented in this paper reveals the impact of the step size and momentum factor on the stability of the proposed method. Numerical simulations validate the theoretical findings and the improved noise reduction performance of the proposed Mom-McALMS for both stationary and time-variant noises. Furthermore, real-time experiments conducted on a McANC window validate the effectiveness of Mom-McALMS in attenuating noise and improving convergence speed when dealing with different types of real-world noises.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112415"},"PeriodicalIF":7.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phononic crystals with non-quantized Zak phases for controlling interface state frequencies","authors":"Seongmin Park,&nbsp;Wonju Jeon","doi":"10.1016/j.ymssp.2025.112405","DOIUrl":"10.1016/j.ymssp.2025.112405","url":null,"abstract":"<div><div>Topological interface and edge states have been extensively studied in phononic and photonic crystals with Zak phases quantized at 0 or π. In this work, we design phononic crystals with non-quantized Zak phases ranging from −0.45π to 0.45π by deliberately breaking the symmetry of the unit cell. Through adjustments of the non-quantized Zak phase, we control the phases of waves reflected from the phononic crystals, ensuring that the interface state occurs at a desired frequency. We provide two applications of such frequency control of interface states. The first application focuses on enhancing wave energy localization in the interface state. We identify the frequencies within the band gap at which the reflection coefficient of the phononic crystals is closest to 1, enabling them to function as near-perfect mirrors. We then induce the interface state at that frequency and compare the localized energy with that at other frequencies. The second application involves controlling the frequencies of interface and edge states to achieve their occurrence at the same frequency, revealing a distinctive state characterized by the overlap of these states. This overlap leads to the simultaneous localization of wave energy at both the interface and edges.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112405"},"PeriodicalIF":7.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fault detection and monitoring using a data-driven information-based strategy: Method, theory, and application","authors":"Camilo Ramírez ,&nbsp;Jorge F. Silva ,&nbsp;Ferhat Tamssaouet ,&nbsp;Tomás Rojas ,&nbsp;Marcos E. Orchard","doi":"10.1016/j.ymssp.2025.112403","DOIUrl":"10.1016/j.ymssp.2025.112403","url":null,"abstract":"<div><div>The ability to detect when a system undergoes an incipient fault is of paramount importance in preventing a critical failure. Classic methods for fault detection – including model-based and data-driven approaches – rely on thresholding error statistics or simple input-residual dependencies but face difficulties with non-linear or non-Gaussian systems. Behavioral methods – e.g., those relying on digital twins – address these difficulties but still face challenges when faulty data is scarce, decision guarantees are required, or working with already-deployed models is required. In this work, we propose an information-driven fault detection method based on a novel concept drift detector, addressing these challenges. The method is tailored to identifying drifts in input-output relationships of additive noise models – i.e., model drifts – and is based on a distribution-free mutual information (MI) estimator. Our scheme does not require prior faulty examples and can be applied distribution-free over a large class of system models. Our core contributions are twofold. First, we demonstrate the connection between fault detection, model drift detection, and testing independence between two random variables. Second, we prove several theoretical properties of the proposed MI-based fault detection scheme: (i) strong consistency, (ii) exponentially fast detection of the non-faulty case, and (iii) control of both significance levels and power of the test. To conclude, we validate our theory with synthetic data and the benchmark dataset N-CMAPSS of aircraft turbofan engines. These empirical results support the usefulness of our methodology in many practical and realistic settings, and the theoretical results show performance guarantees that other methods cannot offer.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112403"},"PeriodicalIF":7.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143280979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance evaluation of elevators using a novel hierarchical softmax regression model","authors":"Dapeng Niu ,&nbsp;Minghao Yang ,&nbsp;Mingxing Jia ,&nbsp;Hongli Jin ,&nbsp;Gang Luo","doi":"10.1016/j.ymssp.2025.112429","DOIUrl":"10.1016/j.ymssp.2025.112429","url":null,"abstract":"<div><div>Elevator performance evaluation plays a guiding role in improving passenger experience and directing the maintenance work. Traditional elevator performance evaluation studies mainly depend on defect data or pertinent norms while ignoring the operation performance. In order to solve these issues, a new method for performance evaluation using hierarchical softmax regression (HSR) based on the operating signal of the elevator measured by sensors is proposed in this paper. By analyzing the vibration in the time and frequency domains, the elevator status can be monitored. Firstly, signal characteristics are studied according to the principles of evaluation indexes. Then, an index system that can characterize elevator performance with practical significance from various aspects such as vibration signal and car operation acceleration is established. Furthermore, an improved weight assignment technique is applied to decrease the dimensionality of the features, which considers data information and knowledge. Finally, an evaluation model is developed and tested for the case using a substantial quantity of data on elevator operations. Unlike traditional methods of manually evaluating performance according to standards, the proposed method aims to automatically evaluate performance based on operating conditions. The effectiveness of the proposed method is verified using an elevator dataset. Through comparison experiment, it is demonstrated that the proposed method achieves better results in terms of rationality.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112429"},"PeriodicalIF":7.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}