Mechanical Systems and Signal Processing最新文献_第10页

A novel method for improving the long-term stability of inertial devices based on model prediction

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-24 DOI: 10.1016/j.ymssp.2025.112492

Jie Yang , Xinlong Wang , Guanghao Nie

{"title":"A novel method for improving the long-term stability of inertial devices based on model prediction","authors":"Jie Yang , Xinlong Wang , Guanghao Nie","doi":"10.1016/j.ymssp.2025.112492","DOIUrl":"10.1016/j.ymssp.2025.112492","url":null,"abstract":"<div><div>The long-term stability (LTS) of inertial devices refers to their ability to maintain consistent performance parameters over a long period. For inertial devices with poor LTS, there is a significant difference between the actual values of their performance parameters and the originally calibrated values, which severely restricts their measurement accuracy. The LTS improvement methods based on hardware structure are technically difficult, time-consuming, and costly; while those based on accelerated test are prone to device damage and have high testing costs. Therefore, a model prediction-based method for improving the LTS of inertial devices is proposed. By analyzing the internal and external factors that affect the LTS of inertial devices, the time-varying mechanism of their performance parameters is revealed, and the Wiener process suitable for describing the time-varying characteristics of performance parameters is obtained. Furthermore, a Wiener process model identification method is proposed, and a novel online prediction scheme for inertial device performance parameters is designed. Experimental results show that the proposed method reduces the error of inertial device performance parameters by 70.00 %–88.42 %, and shortens the stability period of inertial measurement unit (IMU) from 6-9 months to 2–3 months, significantly improving the accuracy and LTS of IMU.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112492"},"PeriodicalIF":7.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480267","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}

引用次数: 0

A lumped-parameter model for stick–slip vibration in train brake systems considering hexagonal friction block sizes

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-24 DOI: 10.1016/j.ymssp.2025.112486

Qixiang Zhang , Huajiang Ouyang , Hang Liu , Jiliang Mo , Bin Tang , Song Zhu , Wenwei Jin

{"title":"A lumped-parameter model for stick–slip vibration in train brake systems considering hexagonal friction block sizes","authors":"Qixiang Zhang , Huajiang Ouyang , Hang Liu , Jiliang Mo , Bin Tang , Song Zhu , Wenwei Jin","doi":"10.1016/j.ymssp.2025.112486","DOIUrl":"10.1016/j.ymssp.2025.112486","url":null,"abstract":"<div><div>This study introduces a lumped-parameter dynamic model considering the geometric characteristics of friction blocks to elucidate the stick–slip vibration in high-speed train brake systems. Taking hexagonal friction blocks in train brake pads as an example, the model integrates their geometric and uneven contact pressure characteristics. A multiscale modeling approach combining fractal contact theory and discrete Iwan model was proposed to describe contact behavior, and a Switch model was employed to simulate stick–slip friction. The variations in stick–slip responses of hexagonal friction blocks of different sizes were analyzed by inputting derived equivalent parameters into the dynamic model. The model was validated using a high-speed train brake simulation test bench, with tests conducted for various friction block sizes. Theoretical and experimental results showed good agreement, confirming the effectiveness of the model. The findings indicate that friction block geometry significantly influences the stick–slip vibration. Larger blocks with increased contact area and mass, improve pressure distribution, increase equivalent contact stiffness, and enhance elastic recovery from minor deformations, thereby reducing nonlinear effects and resulting in a smoother sliding process that mitigates stick–slip vibration. The model provides insights into friction-induced vibration mechanisms and aids in optimizing brake pad design in brake systems.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112486"},"PeriodicalIF":7.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473997","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}

引用次数: 0

Experimental Modal Analysis and variability assessment in Cross-laminated Timber

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-22 DOI: 10.1016/j.ymssp.2025.112466

Benjamin Bondsman , Andrew Peplow

{"title":"Experimental Modal Analysis and variability assessment in Cross-laminated Timber","authors":"Benjamin Bondsman , Andrew Peplow","doi":"10.1016/j.ymssp.2025.112466","DOIUrl":"10.1016/j.ymssp.2025.112466","url":null,"abstract":"<div><div>Experimental Modal Analysis (EMA) plays a crucial role in understanding the dynamic responses of structures to vibration by extracting their modal parameters such as natural frequencies and modal damping and vibration modes. These parameters are essential for assessing structural performance and identifying potential vulnerabilities. As the construction industry embraces sustainable materials, Cross-laminated Timber (CLT) has become a sustainable alternative to traditional materials like reinforced concrete and steel. However, the inherent variability of wood, resulting from factors such as growth conditions, fibre structure, and moisture content, introduces significant fluctuations in the dynamic response of CLT. This variability presents challenges in the broader application of CLT in construction. Despite its increasing use in multistory buildings, a comprehensive assessment of its vibrational characteristics remains incomplete. This study addresses this gap by identifying the dispersion in CLT’s transfer functions and modal parameters through EMA. A CLT slab was divided into 24 nominally identical beam-like substructures, composed of outer layers of Norway spruce and a middle layer of Scots pine. EMA was performed in a broad frequency spectrum along three principal directions, revealing notable variability in resonance frequencies, modal damping, and vibration transfer functions. The study also examines the distinct characteristics of the bending, torsional, and axial vibration modes, providing deeper insights into the variability between the different modes. The findings of this article contribute to a more refined understanding of the dynamic properties of CLT and their associated variability.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112466"},"PeriodicalIF":7.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Refined frequency monitoring based on characteristic excitation with application to early fault diagnosis of thin plate damage

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-22 DOI: 10.1016/j.ymssp.2025.112432

Zhihao Wang, Hui Shi, Zengshou Dong, Xinyu Wen, Wang Jia, Ruijie Zhang

{"title":"Refined frequency monitoring based on characteristic excitation with application to early fault diagnosis of thin plate damage","authors":"Zhihao Wang, Hui Shi, Zengshou Dong, Xinyu Wen, Wang Jia, Ruijie Zhang","doi":"10.1016/j.ymssp.2025.112432","DOIUrl":"10.1016/j.ymssp.2025.112432","url":null,"abstract":"<div><div>This article presents a cascade-structured refined frequency monitoring (RFM) method for high-resolution detection with application to early fault diagnosis of thin plate table. Specifically, in frequency monitoring, the proposed RFM framework fully excites characteristic information from vibration signal subjected to uncertainty and noise, which achieves online monitoring for frequency slight change. The adaptive detection threshold is systematically exploited based on the priori information. As a solving skill for monitoring and diagnosis problems, proposed method has two significant advantages over previous methods. First, frequency monitoring is reformulated into a parameter estimation problem associated with the characteristic equation. This procedure aims to decouple frequency from amplitude and phase, which reduces the dependence of the diagnosis on the parameters. Moreover, by combining the benefits of characteristic observer and tracker, frequency resolution can be improved through effective suppression of uncertainty and noise. Secondly, the synthesis strategy of frequency monitoring and fault detection is developed to potentially enhance the reliability of the diagnostic algorithm. Meanwhile, the proposed method can be incorporated into fault-tolerant controller to implement the integrated technology. The effectiveness of the proposed scheme is tested by numerical simulations and platform experiments.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112432"},"PeriodicalIF":7.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471317","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}

引用次数: 0

Autonomous energy-based model order selection in parameter state space identification via cross Gramian and symmetrizer

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-22 DOI: 10.1016/j.ymssp.2025.112452

Max Moeller , Armin Lenzen

{"title":"Autonomous energy-based model order selection in parameter state space identification via cross Gramian and symmetrizer","authors":"Max Moeller , Armin Lenzen","doi":"10.1016/j.ymssp.2025.112452","DOIUrl":"10.1016/j.ymssp.2025.112452","url":null,"abstract":"<div><div>Subspace system identification is a well known process for modeling complex dynamical systems based on measured data. A key challenge in this domain is determining the dimensionality of the state space, if it is immeasurable, which is critical for estimating a reliable model. Classically, a stabilization diagram is created to select the appropriate model order, which involves subjective human judgment. This can lead to inconsistencies and errors. This paper presents a novel approach to select the model order, called Autonomous Model Order Selection (AMOS), that takes into account the estimated energy of the states. This method utilizes the cross Gramian, which captures the interaction between the system’s states and it is input/output dynamics, and a symmetrizer. The energy error is proposed as a measure to quantify the quality of the approximation of the identified system with respect to the observed measurement. A less subjective and more systematic measure is provided, validated by a simulation and real laboratory measurements of a bending beam. The proposed method is limited to square systems (the number of inputs is equal to the number of outputs).</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112452"},"PeriodicalIF":7.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Noncontact elastography of soft material using a laser profilometer with airpuff excitation

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-22 DOI: 10.1016/j.ymssp.2025.112465

Xiao Chen , Yichu Chen , Wei Yu , Sanming Hu , Pengcheng Li

{"title":"Noncontact elastography of soft material using a laser profilometer with airpuff excitation","authors":"Xiao Chen , Yichu Chen , Wei Yu , Sanming Hu , Pengcheng Li","doi":"10.1016/j.ymssp.2025.112465","DOIUrl":"10.1016/j.ymssp.2025.112465","url":null,"abstract":"<div><div>Elasticity is a fundamental property of materials, and recent advancements in wave-based elastography have revealed significant potential for various biomedical and engineering applications, including biomedical imaging, nondestructive evaluation, and structural health monitoring. However, the implementation of elastography requires high-precision imaging systems, which limits its broader applicability. The laser profilometer, a conventional and cost-effective device that operates based on laser triangulation measurement, has been widely utilized in industrial applications for assessing surface profiles. However, its application in elastography has not been previously explored. This study represents, to the best of our knowledge, the first attempt to adapt a laser profilometer for measuring the elasticity of soft materials. A simple and noncontact method for measuring elasticity has been established utilizing the laser profilometer to track the propagation of surface waves on soft materials when excited by an airpuff. The results demonstrate that laser profilometer elastography can track the propagation of surface waves with a broad spectrum following a single airpuff excitation. The temporal separation of wave propagation from the reflected waves enables precise calculation of the propagation velocity of surface waves. The surface wave velocities measured by laser profilometer elastography and laser speckle elastography show strong agreement with a correlation coefficient of 0.997. Additionally, the shear elastic modulus of agarose phantoms has been validated by comparing the results obtained from a rotary rheometer. This approach improves the noncontact elastic measurement capabilities of traditional laser profilometers by only utilizing an airpuff system. Therefore, it has the potential to expand a new application of laser profilometers and be widely utilized for elasticity measurement in both biomedical and industrial applications.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112465"},"PeriodicalIF":7.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465524","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}

引用次数: 0

A hierarchical Dirichlet process for the background interference suppression to improve the microphone array imaging results

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-22 DOI: 10.1016/j.ymssp.2025.112463

Liang Yu , Mingsheng Lyu , Yongli Zhang , Ran Wang , Yong Fang , Weikang Jiang

{"title":"A hierarchical Dirichlet process for the background interference suppression to improve the microphone array imaging results","authors":"Liang Yu , Mingsheng Lyu , Yongli Zhang , Ran Wang , Yong Fang , Weikang Jiang","doi":"10.1016/j.ymssp.2025.112463","DOIUrl":"10.1016/j.ymssp.2025.112463","url":null,"abstract":"<div><div>Aerodynamic and aeroacoustic measurements in the wind tunnel are essential for the structural design and optimization of the aircraft. Microphone arrays are widely used in wind tunnels for the identification of aircraft noise sources, where the arrays are exposed to strong background interference. Meanwhile, the background interference is varied in different non-anechoic chamber acoustic experiments, and background interference directly affects the identification of noise sources. A generalized array denoising algorithm is proposed to address the interference problem. A hierarchical Dirichlet process is developed to deal with background interference that has non-independent and non-identical distribution characteristics between different microphone channels. At the same time, the sound source signal is also modelled based on its low-rank characteristic. All involved parameters in the model are estimated by the variational Bayesian algorithm. Then, the source signal can be separated from complex background interference. The denoising algorithm is also applied in simulations and wind tunnel experiments to verify its effectiveness and robustness in suppressing complex background interference suppression.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112463"},"PeriodicalIF":7.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465140","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}

引用次数: 0

Expectation–maximization-based Kalman filter under colored measurement noise for INS-based integrated human localization

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-22 DOI: 10.1016/j.ymssp.2025.112461

Yuan Xu , Ruohan Yang , Yuan Zhuang , Kaixin Liu , Xiyuan Chen , Mingxu Sun

引用次数: 0

Research on fault characteristics and signal transfer path mechanism of the gear transmission system

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-21 DOI: 10.1016/j.ymssp.2025.112471

Pu Gao , Qi Yan , Hui Liu , Changle Xiang , Ke Chen

{"title":"Research on fault characteristics and signal transfer path mechanism of the gear transmission system","authors":"Pu Gao , Qi Yan , Hui Liu , Changle Xiang , Ke Chen","doi":"10.1016/j.ymssp.2025.112471","DOIUrl":"10.1016/j.ymssp.2025.112471","url":null,"abstract":"<div><div>The structure of the gear transmission system is complex, the working conditions are changeable, and the system fault forms are various, which leads to the difficulty of diagnosis, identification and location of typical faults. Therefore, it is necessary to carry out research on the fault characteristics and path transmission mechanism of the gear transmission system. In this paper, various fault models for key components, including gears, splines, and bearings, are established. The research then proceeds to analyze the mapping law of typical fault characteristics in the frequency domain. Subsequently, the Operational Transfer Path Analysis (OTPA) method is employed to construct the transfer rate matrix for the gear system. Furthermore, the OTPA model is refined through the use of singular value decomposition (SVD) and principal component analysis (PCA). Ultimately, the fault signal transmission paths are examined within a specific system, and the contribution of different frequency bands for each path is calculated. By sequencing these contributions, the dominant transfer path for fault signal transfer is identified. Additionally, an evaluation mechanism for the transfer path is established, providing theoretical guidance for the arrangement of the surface of a typical fault-sensitive measurement point system. This research strongly supports the ongoing investigation into fault diagnosis, operation, and maintenance of gear transmission systems.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112471"},"PeriodicalIF":7.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465523","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}

引用次数: 0

Influence of leakage during cyclic pneumatic braking on the dynamic behavior of heavy-haul trains

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-02-21 DOI: 10.1016/j.ymssp.2025.112490

Kaizhong Liu , Zhiwei Wang , Mingtao Zhang , Yao Luo , Yukun Wang , Yanfei Shen , Weihua Zhang

{"title":"Influence of leakage during cyclic pneumatic braking on the dynamic behavior of heavy-haul trains","authors":"Kaizhong Liu , Zhiwei Wang , Mingtao Zhang , Yao Luo , Yukun Wang , Yanfei Shen , Weihua Zhang","doi":"10.1016/j.ymssp.2025.112490","DOIUrl":"10.1016/j.ymssp.2025.112490","url":null,"abstract":"<div><div>The pneumatic braking system (PBS) is a critical component in the cyclic braking process of heavy-haul trains (HHTs) in China. However, when a leakage fault occurs in the PBS, the dynamic behavior of the HHT becomes exceedingly complex. To investigate the impact of leakage on the dynamic behavior of HHTs, a PBS model based on fluid dynamics principles is first developed. The leakage in the brake pipe and the characteristics of the brake wave are considered in the PBS model, and the boundary conditions of the brake pipe under leakage are derived. Subsequently, a HHT longitudinal-vertical coupled dynamic model integrating the PBS is established. The dynamic interactions between the longitudinal and vertical motions in the vehicle system are comprehensively involved. Then, a joint simulation of the PBS and HHT dynamics system is conducted in this study to reveal the dynamics performance of HHTs more realistically. The PBS model is validated using a PBS test facility. Finally, the effects of different leakage rates on the longitudinal train impulse, wheel-rail interaction, and vehicle vibration of HHTs during cyclic braking are analyzed sequentially. The results indicate that leakage worsens the longitudinal impulse during the release process, resulting in a heightened coupler tensile force. The longitudinal wheel-rail interaction is significantly affected by the leakage, particularly in rear-train vehicles. Additionally, the leakage amplifies vehicle vibrations during cyclic braking, with the greatest effects observed in middle-train vehicles. These results offer important insights for optimizing the design of PBS and ensuring the safe operation of HHT.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"228 ","pages":"Article 112490"},"PeriodicalIF":7.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454637","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}

引用次数: 0