Mechanical Systems and Signal Processing最新文献_第8页

Multi-scale chirplet synchroextracting transform for accurate characterization of adjacent fault features in rotating machinery 基于多尺度小波同步提取变换的旋转机械相邻故障特征准确表征

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-12 DOI: 10.1016/j.ymssp.2025.112826

Site Lv , Hongan Wu , Shan Zeng , Chen Yu , Ke Yang

{"title":"Multi-scale chirplet synchroextracting transform for accurate characterization of adjacent fault features in rotating machinery","authors":"Site Lv , Hongan Wu , Shan Zeng , Chen Yu , Ke Yang","doi":"10.1016/j.ymssp.2025.112826","DOIUrl":"10.1016/j.ymssp.2025.112826","url":null,"abstract":"<div><div>When mechanical equipment fails, the fault characteristics are often interfered by adjacent components. Therefore, how to well characterize the time-varying laws of multi-component signals containing adjacent components has always been a difficulty and research hotspot in the application of time–frequency analysis (TFA) technologies in mechanical fault diagnosis. In this paper, a new TFA method is proposed, called the Multi-scale chirplet synchroextracting transform (MCSET). On the basis of chirplet transform (CT), by using two additional parameters, the window rotation step is divided into two sections within each window length to more accurately match the instantaneous frequency (IF) trajectory of the nonlinear frequency modulation signal. In this way, the energy-concentrated time–frequency (TF) distribution of the multi-component signal containing adjacent components can be obtained. Moreover, to further improve the TF resolution, a new frequency estimation operator is constructed using the idea of synchronous extraction to more accurately capture the IF variation law of multi-component signals and keep the energy highly concentrated. MCSET can well characterize the dynamic characteristics of components adjacent to the IF trajectory, and as a parameterized TFA technique, it maintains good noise robustness. In simulation and experiments, compared with other similar advanced TFA techniques, the results can verify the effectiveness of the proposed method and its superiority in processing complex non-stationary signals with adjacent IF trajectories.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112826"},"PeriodicalIF":7.9,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935187","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

High-efficiency bi-directional wind energy harvesting based on wake interactions in bluff body tandem configuration 基于尾迹相互作用的钝体串联结构高效双向风能收集

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-12 DOI: 10.1016/j.ymssp.2025.112835

Jinlong Li , Xinyi Wang , Guanggui Cheng , Zhongqiang Zhang , Wan Sun

{"title":"High-efficiency bi-directional wind energy harvesting based on wake interactions in bluff body tandem configuration","authors":"Jinlong Li , Xinyi Wang , Guanggui Cheng , Zhongqiang Zhang , Wan Sun","doi":"10.1016/j.ymssp.2025.112835","DOIUrl":"10.1016/j.ymssp.2025.112835","url":null,"abstract":"<div><div>To address the limitation of unidirectional wind energy harvesters (WEHs) in omnidirectional scenarios, this study introduces a high-efficiency bi-directional wind energy harvester based on wake interactions in bluff body tandem configuration (BWEH-WI). Different from traditional unidirectional and single bluff body structures, the proposed system comprises both outer and inner bluff bodies connected in tandem, each with a distinct cross-section. By harnessing the inherent aerodynamic characteristics of the bluff bodies and the wake interaction phenomenon, bi-directional energy harvesting is realized for both the inner and outer systems. To predict the dynamic behaviors, a coupled aero-electro-mechanical model is developed, dynamics mesh simulations and lift curve analysis are utilized to define the aerodynamic characteristics of the interaction mechanism. Additionally, wind tunnel experiments are carried out to analyze the aerodynamic interactions between the bluff bodies by varying the configurations and gap distances. The mathematical model is validated by comparing the experimental and theoretical results, showing good agreement. The experimental results indicate that the outer bluff body has a dominant influence on the inner bluff body in the negative wind direction, which is the primary cause of the inner bluff body’s periodic vibration. The proposed system exhibits excellent performance with a significant power increase of 116.4 % compared to the conventional single bulb-shaped energy harvester. Overall, this study provides valuable insights and design guidance for achieving bi-directional energy harvesting under the influence of the wake interactions. These findings contribute to the advancement of energy harvesting technology and are of significance for self-powered smart monitoring systems.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112835"},"PeriodicalIF":7.9,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935383","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

An intelligent agent-based method for model updating of structures with multiple uncertain parameters via deep reinforcement learning 基于深度强化学习的多不确定参数结构模型更新方法

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-11 DOI: 10.1016/j.ymssp.2025.112832

Gianluca Bruno, Fabio Parisi, Sergio Ruggieri, Giuseppina Uva

{"title":"An intelligent agent-based method for model updating of structures with multiple uncertain parameters via deep reinforcement learning","authors":"Gianluca Bruno, Fabio Parisi, Sergio Ruggieri, Giuseppina Uva","doi":"10.1016/j.ymssp.2025.112832","DOIUrl":"10.1016/j.ymssp.2025.112832","url":null,"abstract":"<div><div>The paper presents a new method for performing model updating (MU) of structures characterized by uncertain multiple parameters, based on a deep reinforcement learning (DRL) approach. In particular, the idea behind the proposed approach, named DRUM-A (acronym of Deep Reinforcement learning for Updating Model Approach), consists of defining an intelligent agent that can support analysts in performing fine-tuning of the numerical model to update to match numerical and experimental data, by searching correct values of uncertain parameters with high accuracy. DRUM-A was idealized and organized in five consecutive steps. Given data of the monitoring campaign, the definition of the target variables of interest, and a numerical model of the structure in an externally accessible environment, the proposed approach defines a DRL-engine, in which a strategy for tuning the structural control parameters was defined. Contextually, training/test phases of the intelligent agent were performed, to derive the correct solution according to a statistical-based evaluation of results. The paper provides a detailed description of DRUM-A and subsequently reports the application on a dummy structure (and the related comparison with the output provided by a deterministic and a probabilistic approach), and a real-life structure, accounting for multiple uncertain parameters and variables in different scenarios. DRUM-A represents a paradigm shift toward current MU approaches, since it allows managing an increasing number of unknown variables without requiring strict engineering assumptions. In addition, DRUM-A allows performing an online MU, providing accurate estimates of uncertain parameters, with reasonable time and computational efforts.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112832"},"PeriodicalIF":7.9,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935382","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

Ultrasonic reflection-based transient temperature gradient inversion for compensating oil film thickness measurement 基于超声反射的瞬态温度梯度反演补偿油膜厚度测量

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-11 DOI: 10.1016/j.ymssp.2025.112827

Yaping Jia , Shiyuan Chang , Yonggang Xia , Tonghai Wu , Peiping Yang , Pan Dou , Min Yu

{"title":"Ultrasonic reflection-based transient temperature gradient inversion for compensating oil film thickness measurement","authors":"Yaping Jia , Shiyuan Chang , Yonggang Xia , Tonghai Wu , Peiping Yang , Pan Dou , Min Yu","doi":"10.1016/j.ymssp.2025.112827","DOIUrl":"10.1016/j.ymssp.2025.112827","url":null,"abstract":"<div><div>The propagation nature of sonic waves in a temperature gradient field is often simplified with uniform temperature assumptions, resulting in compensation errors in ultrasonic-based oil film measurement. Focusing on this, a novel compensation method of inverting the temperature gradient via ultrasonic signal is proposed. For thrust bearings, the time shift of the reflected signal from the substrate-coating interface is adopted as the inversion index for the heat source. Numerically, the temperature gradient can be derived by solving the heat conduction equation using the finite difference method, then the ultrasound time shift can be theoretically obtained by substituting the acoustic characteristics into each temperature node. In practice, with the measured time shift of the reflection signal, the temperature gradients can be inverted after iterative solutions of the theoretical model. The measurement effectiveness of temperature and oil film thickness have been experimentally validated using a thrust bearing rig, where the ultrasound measurement results were compared with data from thermometric sensors and eddy current sensors.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112827"},"PeriodicalIF":7.9,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931661","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 passive self-tuning vibration neutraliser 被动自调谐振动中和器

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-10 DOI: 10.1016/j.ymssp.2025.112799

Ran Xia , Xiaojun Wei

{"title":"A passive self-tuning vibration neutraliser","authors":"Ran Xia , Xiaojun Wei","doi":"10.1016/j.ymssp.2025.112799","DOIUrl":"10.1016/j.ymssp.2025.112799","url":null,"abstract":"<div><div>This paper proposes a new passive self-tuning vibration neutraliser, which contains a mass, a spring, a lever, a lever fulcrum and a passively self-tuning device. The mass and spring are connected to the two ends of the lever. The other end of the spring is attached to the primary structure. The effective stiffness and mass are dependent upon the position of the fulcrum, which is self-tuneable passively based on the primary structure response. A self-tuning rule is defined for the working of the passively self-tuning device. Specifically, the position of the fulcrum (or the lever ratio) stays unchanged when the displacement of the primary structure is less than a prescribed threshold. Otherwise, the self-tuning device will be kept triggered until an appropriate position of the fulcrum is researched and consequently the displacement is less than the threshold. The self-tuning device is essentially a passive feedback-control system, requiring no sensors, actuators, and external energy. Such a passive self-tuning vibration neutraiser is designed and constructed. Theoretical analyses reveal that a zero can be assigned at the excitation frequency over a broad range to a frequency response function of the primary structure coupled with the proposed neutraliser. It is demonstrated numerically and experimentally on a simply supported beam that the proposed neutraliser exhibits highly-effective, robust and broad-bandwidth performance in control.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112799"},"PeriodicalIF":7.9,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929318","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

Full-field 3D displacement measurement via microwave sensing 基于微波传感的三维位移测量

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-10 DOI: 10.1016/j.ymssp.2025.112804

Yuyong Xiong , Yingjie Gou , Wendi Tian , Xingjian Dong , Guang Meng , Zhike Peng

{"title":"Full-field 3D displacement measurement via microwave sensing","authors":"Yuyong Xiong , Yingjie Gou , Wendi Tian , Xingjian Dong , Guang Meng , Zhike Peng","doi":"10.1016/j.ymssp.2025.112804","DOIUrl":"10.1016/j.ymssp.2025.112804","url":null,"abstract":"<div><div>Full-field three-dimensional (3D) displacement measurement is highly sought after for the mechanical design, assessment, and health monitoring of large structures. The emerging microwave displacement measurement technique provides the potential for wide-ranging full-field measurement capabilities; however, it still faces challenges in achieving full-field 3D displacement measurement. In this article, we propose a novel approach for 3D displacement measurement across numerous measuring points within a full field of view, creating a unique microwave full-field 3D displacement measurement system that employs three microwave transceivers. Firstly, three non-collinear microwave transceivers and reference targets are employed to establish device coordinate system (DCS) and the structural coordinate system (SCS), respectively. Next, we outline the fundamental principle and the corresponding method for automatic matching of measuring points between different microwave transceivers, based on the transformation from SCS to microwave range-angle heatmaps. Furthermore, the 3D displacement reconstruction method in both DCS and SCS are rigorously detailed, followed by the implementation procedures for real-life measurements. Finally, simulation, experiment, and application validations demonstrate the performance of the proposed method, offering an appealing approach for microwave full-field 3D displacement measurement with high universality and accuracy.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112804"},"PeriodicalIF":7.9,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929434","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

Extension of dual equivalent replacement method to optimization of damped primary structure with tuned mass damper 双等效置换法在调谐质量阻尼器阻尼主结构优化中的推广

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-08 DOI: 10.1016/j.ymssp.2025.112813

N.N. Linh , N.A. Ngoc , T.D. Nang , N.X Nguyen , N.D. Anh , I. Elishakoff

{"title":"Extension of dual equivalent replacement method to optimization of damped primary structure with tuned mass damper","authors":"N.N. Linh , N.A. Ngoc , T.D. Nang , N.X Nguyen , N.D. Anh , I. Elishakoff","doi":"10.1016/j.ymssp.2025.112813","DOIUrl":"10.1016/j.ymssp.2025.112813","url":null,"abstract":"<div><div>Optimization of systems of damped primary structures with tuned mass dampers (TMDs) remains a challenge for analytical methods to date. Due to the existence of the primary structure damping, the well-known fixed point theory is not directly applicable. This paper deals with this problem. First, it is found that there exist two so-called semi-fixed points of which the abscissas are independent of TMD’s damping even in the case of damped primary structures. Next, the Dual equivalent replacement method (DER) is introduced with the formulation in the form of the Weighted dual criterion (WDC). Based on DER, the original system can be equivalently replaced with a system of undamped primary structure with the same TMD, to which the fixed point theory can be applied. It turns out that the damping ratio of the original system is the same as the optimal one of the equivalent system derived from the fixed point theory. Meanwhile, the tuning ratio depends on the embedding weight of WDC. A condition involving semi-fixed points is proposed to find an explicit weight, followed by the optimal tuning ratio. Comparison of the obtained result with those provided by several approximate techniques is then performed. It is shown that the proposed method gives better results than those methods.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112813"},"PeriodicalIF":7.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917953","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

Research on finite frequency robust H∞ control of all-terrain vehicle magnetorheological suspension system 全地形车辆磁流变悬架系统有限频率鲁棒H∞控制研究

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-08 DOI: 10.1016/j.ymssp.2025.112803

Miao Yu, Dongbin Xia, Wei Li, Gaowei Han, Xiumei Du, Jie Fu

{"title":"Research on finite frequency robust H∞ control of all-terrain vehicle magnetorheological suspension system","authors":"Miao Yu, Dongbin Xia, Wei Li, Gaowei Han, Xiumei Du, Jie Fu","doi":"10.1016/j.ymssp.2025.112803","DOIUrl":"10.1016/j.ymssp.2025.112803","url":null,"abstract":"<div><div>To improve the vibration attenuation performance of the all-terrain vehicles (ATVs) equipped with magnetorheological (MR) suspension with parameter uncertainty and time delay in the sensitive frequency band of human body, this study proposed a finite-frequency robust (FFR) <span><math><msub><mtext>H</mtext><mi>∞</mi></msub></math></span> control strategy. Firstly, a MR suspension model with seven degrees of freedom is established. The boundaries of parameter uncertainty and time delay are obtained through the experiment analysis of the MR damper, occupants and cargo mass. Secondly, in the framework of Lyapunov-Krasovskii stability theory, an FFR <span><math><msub><mtext>H</mtext><mi>∞</mi></msub></math></span> controller is designed in the frequency domain of human sensitivity specified in ISO2631 to enhance ride comfort level. Meanwhile, three suspension constrained requirements of suspension deflection, wheel dynamic load, actuator force are also guaranteed. Subsequently, the controller parameters with frequency-dependent characteristics are obtained using the linear matrix inequality (LMI) toolbox. Finally, off-road road experiments are conducted to validate the effectiveness of the designed controller. The results indicate that the FFR <span><math><msub><mtext>H</mtext><mi>∞</mi></msub></math></span> controller demonstrates an outperform capability for attenuate the vertical (4–12.5 Hz), pitch, and roll (0.5–2 Hz) accelerations in the human-sensitive frequency bands compared with the passive and traditional robust (TR) <span><math><msub><mtext>H</mtext><mi>∞</mi></msub></math></span> control algorithms.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112803"},"PeriodicalIF":7.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923684","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

Study on effect of shaft asymmetry on the dynamic response of the rotor-bearing system 轴不对称对转子-轴承系统动力响应影响的研究

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-08 DOI: 10.1016/j.ymssp.2025.112805

Yuan Li , Heng Liu , Yi Liu , Zhongliang Xie , Yinsi Chen

{"title":"Study on effect of shaft asymmetry on the dynamic response of the rotor-bearing system","authors":"Yuan Li , Heng Liu , Yi Liu , Zhongliang Xie , Yinsi Chen","doi":"10.1016/j.ymssp.2025.112805","DOIUrl":"10.1016/j.ymssp.2025.112805","url":null,"abstract":"<div><div>In this paper, the dynamic responses of a rotor-bearing system with an asymmetric shaft are studied, focusing on the effect of the shaft asymmetry on the dynamic response of the rotor-bearing system. The asymmetric shaft is modeled considering shear effect based on Timoshenko beam theory. Both one-sided and two-sided cuts are considered in the cross-section of the asymmetric shaft. Various positions and lengths of the cuts along the shaft are also studied. A sliding bearing with cavitation boundary condition is adopted and the nonlinear oil film forces are accounted for in the rotor-bearing system. The eccentricity and the frequency difference of the asymmetric shaft have been investigated by numerical modeling and experimental validation. Their crucial role in determining sub-critical vibration and the dynamic response of the rotor-bearing system is elucidated for the first time. Their effects on sub-critical vibration are investigated for five cases of the asymmetric shafts applied in engineering practice, including different cut types, depths, positions, and lengths. The potential of these two proposed structural parameters for applications in the dynamical analysis of other complex rotor-bearing systems is demonstrated accordingly. The numerical results are in good agreement with the experimental results. This study will contribute to damage identification and health monitoring of such rotor-bearing systems.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112805"},"PeriodicalIF":7.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918491","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

Principle, design and characterization of a human-inspired flexible mechanism for capturing non-cooperative targets 一种人类启发的捕获非合作目标的灵活机制的原理、设计和特性

IF 7.9 1区工程技术

Mechanical Systems and Signal Processing Pub Date : 2025-05-08 DOI: 10.1016/j.ymssp.2025.112818

Shaoqi Lin , Ming Chu , Huayu Zhang , Sheng Xu , Gena Gan

{"title":"Principle, design and characterization of a human-inspired flexible mechanism for capturing non-cooperative targets","authors":"Shaoqi Lin , Ming Chu , Huayu Zhang , Sheng Xu , Gena Gan","doi":"10.1016/j.ymssp.2025.112818","DOIUrl":"10.1016/j.ymssp.2025.112818","url":null,"abstract":"<div><div>Inspired by the biomechanics of human shoulder and elbow joints, this study proposes a novel 4-DOF human-inspired flexible mechanism (HIFM). The HIFM integrates a dual-mode operational characteristic that combines rigidity and flexibility, with a particular emphasis on its flexible mode, which significantly enhances the safety and stability of capturing non-cooperative targets. First, a dynamic model of the flexible spacecraft system, incorporating the HIFM and a post-capture compound spacecraft with active attitude control, is developed using Kane’s method. Second, a series of simulations, including numerical and virtual prototype testing, as well as experimental validation using an air-flotation microgravity testbed, are conducted to assess the HIFM’s performance. Comparative analysis with a single-DOF bio-inspired isolation (BII) system and traditional rigid capture method demonstrates that the HIFM exhibits superior omnidirectional buffering performance during the capture phase, achieving a peak values of impact force-torque reduction of up to 84.11% while effectively preventing abrupt changes in the motion state of the spacecraft base. In addition, the HIFM significantly enhances the controllability and robustness of the post-capture compound system, achieving 37.5% reduction in attitude adjustment time and 1.42% decrease in energy consumption. Moreover, the HIFM extends the contact duration between the target and the service spacecraft by at least 2000%, thereby creating a critical operational window for the capture mechanism. Overall, this study not only provides a theoretical and practical framework for passive compliance mechanisms in non-cooperative targets capture but also lays the groundwork for future research on optimization control for space missions. These findings significantly enhance the reliability and efficiency of spacecraft servicing operations.</div></div>","PeriodicalId":51124,"journal":{"name":"Mechanical Systems and Signal Processing","volume":"234 ","pages":"Article 112818"},"PeriodicalIF":7.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918492","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