Mechanical Systems and Signal Processing最新文献

{"title":"Optimising wellbore annular leakage detection and diagnosis model: A signal feature enhancement and hybrid intelligent optimised LSSVM approach","authors":"Zhongxi Zhu ,&nbsp;Hong Liu ,&nbsp;Wanneng Lei ,&nbsp;Youqiang Xue ,&nbsp;Changjian Xiao","doi":"10.1016/j.ymssp.2025.112451","DOIUrl":"10.1016/j.ymssp.2025.112451","url":null,"abstract":"<div><div>The occurrence of leakage in the wellbore annulus can severely impact drilling operations. To address well leakage detection, an improved diagnostic model is proposed, optimising three aspects: signal processing, feature selection, and model optimisation. The model combines the RIME-ICEEMDAN-SWT signal processing method with SAPSO-GWO-LSSVM for diagnosis. First, the Rime Optimization Algorithm (RIME) optimises the Improved Complete Ensemble Empirical Mode Decomposition with Additive Noise (ICEEMDAN), enhancing the algorithm’s self-adaptive tuning capability. Simulation and experimental results demonstrate that the RIME-ICEEMDAN-SWT method improves the quality of well leakage signals. To better extract leakage features, time–frequency information from the signal is fully integrated, and Lasso regression is used for feature dimensionality reduction, enabling automatic selection of key features. Finally, to reduce model complexity, a SAPSO-GWO-LSSVM-based diagnostic model is developed, integrating Simulated Annealing (SA), Particle Swarm Optimisation (PSO), and Grey Wolf Optimisation (GWO) to form a hybrid population intelligent optimisation algorithm. This algorithm optimises the Least Squares Support Vector Machine (LSSVM). The model is tested on five simulated wellbores of various sizes, achieving an average diagnostic accuracy above 95%, with a standard deviation between 0.35 and 0.6. The results confirm the model’s high accuracy and stability.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112451"},"PeriodicalIF":7.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418569","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":"An adaptive active vibration control for flexible beam systems under unknown deterministic disturbances","authors":"Fanfan Qian ,&nbsp;Haichun Ding ,&nbsp;Tianqi Liu ,&nbsp;Zhizheng Wu ,&nbsp;Xuping Zhang ,&nbsp;Azhar Iqbal","doi":"10.1016/j.ymssp.2025.112447","DOIUrl":"10.1016/j.ymssp.2025.112447","url":null,"abstract":"<div><div>An adaptive active vibration control approach has been proposed for flexible beam systems to reject unknown deterministic disturbance in this paper. In the proposed feedback control scheme, a robust controller is firstly developed to stabilize the mode-truncated inner-loop system with the properly formulated uncertain transfer functions. Subsequently, the Youla parameters are augmented with the base robust controller to formulate a <em>Q</em> parametrized set of all stabilizing controllers, whose dimensionality of <em>Q</em> is suitably selected to meet the requirement pertaining to the robustness in the context of model uncertainties of the flexible beam system and the disturbance characteristics. A recursive least squares (RLS) algorithm incorporating projection is utilized to adjust the augmented Youla parameters online for the disturbance with the unknown and time-varying characteristics. The existence of Youla parameters and the stability of the proposed Youla adaptive vibration control scheme have been analyzed. The simulation for a flexible beam system against unknown deterministic disturbance and an experimental test evaluation to attenuate the unknown flying height fluctuations of the read/write head suspension in data storage system have been illustrated to show the effectiveness of the proposed adaptive active vibration control approach.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112447"},"PeriodicalIF":7.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418570","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":"Metamaterial shaft with a low Poisson’s ratio lattice structure for torsional vibration isolation","authors":"Yangjun Wu ,&nbsp;Hongliang Yao ,&nbsp;Xuangong Li ,&nbsp;Shendong Han","doi":"10.1016/j.ymssp.2025.112454","DOIUrl":"10.1016/j.ymssp.2025.112454","url":null,"abstract":"<div><div>To suppress the torsional vibration of shafts, a metamaterial structure made up of the lattice structure with a low Poisson’s ratio is presented in this paper. Firstly, to improve the efficiency, the homogeneous model is established to replace the lattice structure. Its homogenized properties are estimated using the asymptotic homogenization (AH) method. Subsequently, through the Bragg scattering (BS) mechanism and the transfer matrix method (TMM), a parametric analysis is performed to evaluate the influence of the structural parameters of the metamaterial shaft on the band-gap distribution. Furthermore, using the data-driven optimization method, the band-gap distribution of the metamaterial shaft is optimized so as to attenuate the torsional vibration of the electric drive system of the hybrid electric vehicle (HEV). The optimization results show that not only does the range of band gap for the optimized metamaterial shaft satisfy the optimization target of 1200–4000 Hz, but also the band-gap width increases significantly. Finally, the optimized metamaterial shaft is fabricated by additive manufacturing technique, and its vibration isolation performance is verified experimentally.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112454"},"PeriodicalIF":7.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418568","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":"Amplitude-saturated control of underactuated double-pendulum tower cranes: Design and experiments","authors":"Peng Huang ,&nbsp;Zhongcai Zhang ,&nbsp;Yang Gao","doi":"10.1016/j.ymssp.2025.112419","DOIUrl":"10.1016/j.ymssp.2025.112419","url":null,"abstract":"<div><div>In practical industrial transportation applications, tower cranes play a crucial role. However, the existing control methods for tower cranes often overlook the double-pendulum effect or only consider the linearized double-pendulum dynamic model. To address these issues, for double-pendulum tower cranes, this paper proposes an amplitude-saturated nonlinear control method without velocity measurement. This design approach does not require any linearization operation and effectively eliminates the effect of steady-state error through elaborately constructed composite variables. The theoretical analysis guarantees that the controller can effectively suppress load oscillation and satisfy input constraints. Furthermore, it is proved that the state variables of the closed-loop system can asymptotically converge to the equilibrium point by means of Lyapunov theorem and LaSalle’s invariance principle. Finally, experimental results are provided to validate the feasibility of the proposed method.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112419"},"PeriodicalIF":7.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418571","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":"Fast evaluation of central moments for non-Gaussian random loads in vibration fatigue","authors":"M. Palmieri ,&nbsp;J. Slavič ,&nbsp;F. Cianetti","doi":"10.1016/j.ymssp.2025.112434","DOIUrl":"10.1016/j.ymssp.2025.112434","url":null,"abstract":"<div><div>In vibration fatigue analysis, spectral methods are used to evaluate the fatigue damage of structures experiencing random vibrations. Spectral methods fail under non-Gaussian and non-stationary loading conditions and various solutions have been proposed. Correction coefficients are promising and depend on the kurtosis and skewness of the system’s response, which requires extensive time-domain analyses. Performing time-domain analysis undermines the computational efficiency of spectral methods. The present manuscript proposes a modal decomposition-based approach to numerically efficiently compute the central moments required to obtain the kurtosis and skewness. The proposed method is numerically validated on a structure subjected to non-Gaussian random loads. The proposed method demonstrates results identical to the standard approach, showing a reduction in computation time of around two orders of magnitude. This extends the applicability of spectral methods in conjunction with correction coefficients for numerical estimation of fatigue damage in the frequency domain even in the case of non-Gaussian loadings.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112434"},"PeriodicalIF":7.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418574","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":"The design of spatial compliant mechanisms with distributed multi-stability based on post-buckled cylindrical compliant beams","authors":"Haitong Liang ,&nbsp;Zhidi Yang ,&nbsp;Liwen Zhang ,&nbsp;Bin Luo ,&nbsp;Hongguang Liu ,&nbsp;Li Li ,&nbsp;Jonathan B. Hopkins ,&nbsp;Guangbo Hao","doi":"10.1016/j.ymssp.2025.112365","DOIUrl":"10.1016/j.ymssp.2025.112365","url":null,"abstract":"<div><div>Multi-stable compliant mechanisms (MSCMs) feature multiple stable structural configurations. The majority of MSCMs can only transfer from one stable configuration to another via a single transferring path in a fixed sequence, which is defined as hierarchical multi-stability. This study introduces the distributed concept from the computing science to the field of MSCMs. The compliant mechanism with distributed multi-stability has a group of stable states which are mutually connected by a network of stable-state-transferring paths. It can transfer from one stable state to the targeted one via multiple paths. A general structural method is proposed to construct the spatial compliant mechanisms with distributed multi-stability based on the interaction of post-buckled cylindrical compliant beams. The beams are spatially arranged to align the lines that connect the vertex and the center point of five convex regular polyhedrons. A series of distributed multi-stability, i.e. octa-stability (conditional), hexa-stability, octa-stability, dodeca-stability, and icosa-stability, can be obtained. The distributed hexa-stability is focused and demonstrated in this research as a case study. A sequential preloading method is proposed for equivalent axial displacement preloading on the compliant beams in both finite element analysis (FEA) simulations and prototype operations. As a case study, the distributed hexa-stability is verified by the strain energy distribution scatter graph drawn based on the FEA simulations. The six stable states are equivalent and have identical rotational angles observing from the direction perpendicular to each surface of the outer cubic frame. A prototype of the hexa-stable compliant mechanism is fabricated using 3D printers in the assembling manner. The distributed hexa-stability is further observed, measured, and experimentally verified using a Vicon camera system. The application of the hexa-stable compliant mechanism used as a multi-directional optical reflector is demonstrated. Extending the geometric configurations from regular polyhedrons to semi-regular polyhedrons and regular prisms, the capability of the proposed structural concept to construct multi-stability is investigated. The series of MSCMs with distributed multi-stability can be used as multi-base logical units for advanced mechanical computing. Further application fields include precision platform, vibrational energy harvesting, space exploration, metamaterials, and adjustable mirror mounts in photonics.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112365"},"PeriodicalIF":7.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418577","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":"Collaborative multi-objective design strategy of number and placement for structural vibration suppression components with correlated and bounded uncertainties","authors":"Qingshuang Wang ,&nbsp;Chen Yang ,&nbsp;Guorui Yuan ,&nbsp;Ziyao Fan","doi":"10.1016/j.ymssp.2025.112448","DOIUrl":"10.1016/j.ymssp.2025.112448","url":null,"abstract":"<div><div>The optimization of structural vibration suppression components is of great significance to the active control of vibration and sound. For the active vibration control system with correlated and bounded uncertainty, this paper proposes a collaborative design strategy for the number and placement of structural vibration suppression components. The uncertainty is quantified as an interval parameter. The interval analysis of the active vibration control system is realized by the convex sets-based method. Analyzing the controllability and observability of the system, the Gramian criteria for the placement of structural vibration suppression components can be obtained. By propagating uncertainty based on convex sets, the bounds of eigenvalues for the Gramian criteria can be obtained. To optimize the number and placement of structural vibration suppression components, a collaborative design strategy is developed. This strategy first optimizes the number by comparing the Pareto Front with different component counts. On this basis, the multi-objective robust optimization for placement of component method is implemented by considering the interval and radius of the performance index. The feasibility of the collaborative multi-objective design strategy is demonstrated by two examples.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112448"},"PeriodicalIF":7.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418576","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":"Dual disentanglement domain generalization method for rotating Machinery fault diagnosis","authors":"Guowei Zhang ,&nbsp;Xianguang Kong ,&nbsp;Hongbo Ma ,&nbsp;Qibin Wang ,&nbsp;Jingli Du ,&nbsp;Jinrui Wang","doi":"10.1016/j.ymssp.2025.112460","DOIUrl":"10.1016/j.ymssp.2025.112460","url":null,"abstract":"<div><div>The objective of domain generalization fault diagnosis is to develop a robust model that can generalize to unseen domains. This makes it a highly ambitious and challenging task. However, most current methods rely on domain labels to extract domain-invariant features and do not consider the negative impact of the presence of class-irrelevant features in domain-invariant features on generalization. Therefore, this paper proposes a dual disentanglement domain generalization method for rotating machinery fault diagnosis that does not depend on domain labels. Based on the analysis of the potential features between domains and class labels, a dual contrastive disentanglement module and an adversarial mask disentanglement module are proposed to disentangle the domain-invariant and class-relevant features, respectively. Specifically, in the dual contrastive disentanglement module, the concept of contrasting is employed to train the network shallow features of the source data and the style-enhanced data to produce domain-aware mask decoupled domain-specific and domain-invariant representations. The adversarial mask disentanglement module uses an adversarial classifier to update the class-aware mask and further accurately separate class-relevant and class-irrelevant features. Concurrently, the KLD loss is devised to guarantee that the class-relevant features encompass sufficient labeling information. Finally, the efficacy of the method is substantiated by comprehensive experimental findings on both public and private datasets. The code will be available at: <span><span>https://github.com/GuoweiaaZhang/DDDG</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112460"},"PeriodicalIF":7.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418575","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":"A novel algorithm for tool wear monitoring utilizing model and Knowledge-Guided Multi-Expert weighted adversarial deep transfer learning","authors":"Zhilie Gao,&nbsp;Ni Chen,&nbsp;Liang Li","doi":"10.1016/j.ymssp.2025.112456","DOIUrl":"10.1016/j.ymssp.2025.112456","url":null,"abstract":"<div><div>Monitoring tool wear is vital in the cutting process as it guarantees the quality production of intricate aerospace components and boosts manufacturing efficiency. However, traditional monitoring methods may fall short when confronted with varying cutting conditions and a scarcity of data. To address this, the paper introduces an innovative algorithm known as MKWADTL (Model and Knowledge-Guided Multi-Expert Weighted Adversarial Deep Transfer Learning). The primary aim of MKWADTL is to refine the main network’s performance by tapping into the inherent knowledge embedded within the cutting parameters. Moreover, the algorithm capitalizes on the correlation between force signals and the variance in tool wear across different time frames to formulate a loss function that is informed by physical principles. In addition, the paper puts forward a multi-expert weighted adversarial structure. Through this framework, multiple experts can independently learn and identify various signal characteristics. Subsequently, the features extracted by these experts are integrated to ensure more precise data feature extraction, facilitating the monitoring of tool wear across a spectrum of processing environments. The MKWADTL algorithm’s exceptional accuracy in monitoring is exemplified on the custom-crafted dataset, the NUAA dataset and the NASA dataset.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112456"},"PeriodicalIF":7.9,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403357","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":"A multidirectional magnetic flux leakage detection based crack 3-D profile reconstruction method","authors":"Shengping Li ,&nbsp;Libing Bai ,&nbsp;Chao Ren ,&nbsp;Xu Zhang ,&nbsp;Jiangshan Ai ,&nbsp;Jie Zhang","doi":"10.1016/j.ymssp.2025.112408","DOIUrl":"10.1016/j.ymssp.2025.112408","url":null,"abstract":"<div><div>Magnetic flux leakage detection is a widely used method for non-destructive testing of ferromagnetic materials. In the research field, the profile reconstruction of defects is the focus. Due to the small width and complex morphology of cracks, it is easy to have signals missing and distortion based on unidirectional magnetic field excitation. Such issues make it difficult to reconstruct the three-dimensional profile. In this paper, a crack three-dimensional profile reconstruction method based on multidirectional magnetic field excitation is proposed. It establishes the simultaneous equations for different excitation directions. Then, it finds the solution satisfying all signals using the regularized conjugate gradient inversion method. This approach can combine the MFL information from different excitation directions to achieve more accurate defect reconstruction. Comparison results based on simulated datas between different directional excitations are carried out. Different artificial defects were also used to experimentally verify the feasibility of the present method.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112408"},"PeriodicalIF":7.9,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395358","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}