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< Page ,Total 35 >
The effect of warm laser shock peening on the thermal stability of compressive residual stress and the hot corrosion resistance of Ni-based single-crystal superalloy EI
期刊论文 | 2022 , 146 | Optics and Laser Technology
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Abstract :

Warm laser shock peening (WLSP) is a new surface modification technique combining laser shock peening (LSP) and dynamic strain aging (DSA). In order to investigate the surface modification of Ni-based single-crystal superalloy by WLSP and the mechanism of action, and to compare LSP, WLSP, and LSP experiments were conducted on DD6 (Chinese Brand) samples. After that, the samples were subjected to heat treatment and hot corrosion experiments, respectively. The samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and field emission transmission electron microscopy (FE-TEM) to obtain the deformation and strengthening mechanisms of WLSP and LSP on the material. In addition, the experimental results were analyzed to obtain the improvement mechanism of WLSP on the thermal stability of compressive residual stress and the hot corrosion resistance of the samples. To summarize the experimental results, we obtained that the near-surface dislocation distribution, dislocation density, thermal stability of compressive residual stress, and hot corrosion resistance of the material all tend to improve with increasing temperature for the WLSP-treated samples. © 2021 Elsevier Ltd

Keyword :

Superalloys Thermodynamic stability Corrosion resistance Residual stresses Single crystals High temperature corrosion Field emission microscopes Scanning electron microscopy Nickel alloys Enamels Field emission High resolution transmission electron microscopy

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GB/T 7714 Tang, Zhanghan , Dong, Xia , Geng, Yongxiang et al. The effect of warm laser shock peening on the thermal stability of compressive residual stress and the hot corrosion resistance of Ni-based single-crystal superalloy [J]. | Optics and Laser Technology , 2022 , 146 .
MLA Tang, Zhanghan et al. "The effect of warm laser shock peening on the thermal stability of compressive residual stress and the hot corrosion resistance of Ni-based single-crystal superalloy" . | Optics and Laser Technology 146 (2022) .
APA Tang, Zhanghan , Dong, Xia , Geng, Yongxiang , Wang, Kedian , Duan, Wenqiang , Gao, Meng et al. The effect of warm laser shock peening on the thermal stability of compressive residual stress and the hot corrosion resistance of Ni-based single-crystal superalloy . | Optics and Laser Technology , 2022 , 146 .
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Periodic Numerical Rough Surface Filtered Generation EI SCIE
期刊论文 | 2021 , 143 (8) | Journal of Tribology
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Numerical surface filtered generation is one of the main methods for generating numerical rough surfaces, but when faced with rough surfaces with waviness or large periodicity, traditional filtering methods cannot be implemented well. Because of this, the paper adopts the method of decomposing and synthesizing the maximum period and random part of the periodic rough surface. By decomposing the statistical parameters of the target surface, the statistical parameters of the ideal periodic surface and the random surface are generated, respectively, and then according to the surface parameters generate the surfaces and synthesize them. By comparing the statistical parameters and morphology of the synthesized surface with its actual surface, it can be found that this method can well achieve the generation of periodic rough surfaces, which is a good improvement to the original filter generation method. © 2020 Royal Society of Chemistry. All rights reserved.

Keyword :

Surface measurement Morphology Numerical methods

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GB/T 7714 Liu, Runqing , Tao, Tao , Mei, Xuesong . Periodic Numerical Rough Surface Filtered Generation [J]. | Journal of Tribology , 2021 , 143 (8) .
MLA Liu, Runqing et al. "Periodic Numerical Rough Surface Filtered Generation" . | Journal of Tribology 143 . 8 (2021) .
APA Liu, Runqing , Tao, Tao , Mei, Xuesong . Periodic Numerical Rough Surface Filtered Generation . | Journal of Tribology , 2021 , 143 (8) .
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Fabrication of millimeter-scale deep microchannels in fused silica by femtosecond laser filamentation effect EI SCIE
期刊论文 | 2021 , 142 | Optics and Laser Technology
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In this work, a millimeter-scale deep microchannel is processed in 2 mm thick fused silica using direct punching based on the femtosecond laser filamentation effect. The length of the femtosecond laser filament, the position and the time of interaction with the material were adjusted by changing the laser power, focus position and processing time. The variations of depth and opening diameter with different laser parameters were further analyzed under linearly polarized light and circularly polarized light. The results show that in the negative defocusing state (2 mm), the depth of the microchannel increases and the opening diameter of the microchannel remains almost unchanged as the defocusing distance increases. Compared with the microchannel processed by linearly polarized light, the microchannel processed by circularly polarized light has a larger depth and a smaller diameter under the same parameter combination. The influence of polarization state on microchannel opening roundness and bottom morphology was analyzed. The possible influencing mechanisms of femtosecond laser processing microchannel were elucidated. Based on this, the optimum combination of parameters for processing millimeter-scale deep-microchannels in fused silica was obtained. Therefore, this work would be helpful for the application of fused silica materials in microchannels. © 2021 Elsevier Ltd

Keyword :

Microchannels Fused silica Circular polarization Femtosecond lasers Light polarization

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GB/T 7714 Liao, Kai , Wang, Wenjun , Mei, Xuesong et al. Fabrication of millimeter-scale deep microchannels in fused silica by femtosecond laser filamentation effect [J]. | Optics and Laser Technology , 2021 , 142 .
MLA Liao, Kai et al. "Fabrication of millimeter-scale deep microchannels in fused silica by femtosecond laser filamentation effect" . | Optics and Laser Technology 142 (2021) .
APA Liao, Kai , Wang, Wenjun , Mei, Xuesong , Liu, Bin . Fabrication of millimeter-scale deep microchannels in fused silica by femtosecond laser filamentation effect . | Optics and Laser Technology , 2021 , 142 .
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Improved battery performance of Fe-doped LiVPO4F with high capacity and stable cycling EI SCIE
期刊论文 | 2021 , 286 | Materials Letters
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Abstract :

LiVPO4F is considered as an upgrade of current LiFePO4 cathode for rechargeable lithium batteries due to its superior thermal stability and mildly high voltage plateau. However, the low intrinsic electric conductivity and sluggish electrochemical kinetics constrain its battery performance and practical development. Partial substitution of vanadium with iron is designed in this paper given the similarity of LiVPO4F and LiFePO4OH. The phase structure, particle size, battery performance and electrochemical kinetics of LiV1-xFexPO4F (0 ≤ x 0.9Fe0.1PO4F is found having the optimal electrochemical performance, and delivers a reversible specific capacity of 132 mA h g−1 and 80 mA h g−1 at C/8 and 6C, respectively. After 300 cycles at 0.5C rate, the capacity slowly reduces from 119 mA h g−1 to 108 mA h g−1 with a retention of 90.8%. © 2020 Elsevier B.V.

Keyword :

Lithium batteries Particle size Iron compounds Lithium compounds

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GB/T 7714 Sun, Xiaofei , Hu, Qiongdan , Tao, Tietuo et al. Improved battery performance of Fe-doped LiVPO4F with high capacity and stable cycling [J]. | Materials Letters , 2021 , 286 .
MLA Sun, Xiaofei et al. "Improved battery performance of Fe-doped LiVPO4F with high capacity and stable cycling" . | Materials Letters 286 (2021) .
APA Sun, Xiaofei , Hu, Qiongdan , Tao, Tietuo , Ndahimana, Anastase , Qi, Lin , Li, Quansheng et al. Improved battery performance of Fe-doped LiVPO4F with high capacity and stable cycling . | Materials Letters , 2021 , 286 .
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Research on identification of unbalance parameters of rotor with multi-plane using improved particle swarm optimization EI SCIE
期刊论文 | 2021 , 43 (2) | Journal of the Brazilian Society of Mechanical Sciences and Engineering
WoS CC Cited Count: 1
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Abstract :

Based on Bentley RK4 test rig, the method of nonlinear particle swarm optimization (PSO) is used to solve inverse problem instead of previous methods, which reduces identification complexity and avoids the ill posed problem caused by the singular equation in the process of solving. This paper realized model-based standard particle swarm optimization (SPSO) algorithm after modelling of the finite element model of rotor system and creating the optimization variables and individual fitness function, and then established asynchronous adaptive particle swarm optimization with optimizing speed weight and search scope. In order to further improve algorithm accuracy, chaos weighted particle swarm optimization and double chaos particle swarm optimization (DCPSO) are established. The simulation results of four methods show that DCPSO can realize accurate identification of unbalanced parameters with an average error of 2.86%. The effectiveness and rationality of this algorithm are verified from the speed of 240–3000 r/min. Particularly, at 2040 r/min, the percentage of amplitude decrease in two measuring points is 94.07% and 95.93%, which has achieved excellent vibration suppression effect. © 2021, The Brazilian Society of Mechanical Sciences and Engineering.

Keyword :

Nonlinear equations Particle swarm optimization (PSO) Parameter estimation Inverse problems

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GB/T 7714 Yun, Xialun , Pang, Zhekai , Jiang, Gedong et al. Research on identification of unbalance parameters of rotor with multi-plane using improved particle swarm optimization [J]. | Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2021 , 43 (2) .
MLA Yun, Xialun et al. "Research on identification of unbalance parameters of rotor with multi-plane using improved particle swarm optimization" . | Journal of the Brazilian Society of Mechanical Sciences and Engineering 43 . 2 (2021) .
APA Yun, Xialun , Pang, Zhekai , Jiang, Gedong , Mei, Xuesong . Research on identification of unbalance parameters of rotor with multi-plane using improved particle swarm optimization . | Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2021 , 43 (2) .
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General fabrication of metal oxide nanoparticles modified graphene for supercapacitors by laser ablation EI
期刊论文 | 2021 , 568 | Applied Surface Science
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Metal oxide nanoparticles (MONPs)-graphene composites are highly valued candidate electrode materials for electrochemical supercapacitor (SC). Here, we described the development of a versatile approach for fabricating SC electrodes by impregnating MONPs (M = Ti, Ni, Sn) synthesized by laser ablation in liquid on laser-induced graphene (LIG). A typical SnO2/LIG micro-supercapacitor (MSC) delivers an area-specific capacitance of 18.58 mF cm−2 at a scan rate of 10 mV s−1, which is 5.2 times greater than the unmodified LIG. Moreover, the MSC exhibits long-life cycling stability (retaining 82.15% of specific capacitance after 5000 cycles) and good mechanical flexibility (specific capacitance is reduced by 5% at bending angle of 150°). MONPs and LIG are prepared using the same laser processing system, and no chemical ligands or reducing agents used in the synthesis process, which is cost-effective and green. This simple and straightforward method provide a highly operable solution for the large-scale preparation of MSC. © 2021 Elsevier B.V.

Keyword :

Fabrication Synthesis (chemical) Capacitance Graphene Laser ablation Metals Cost effectiveness Supercapacitor Reducing agents Metal nanoparticles Electrochemical electrodes

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GB/T 7714 Zhu, Chenguang , Dong, Xia , Mei, Xuesong et al. General fabrication of metal oxide nanoparticles modified graphene for supercapacitors by laser ablation [J]. | Applied Surface Science , 2021 , 568 .
MLA Zhu, Chenguang et al. "General fabrication of metal oxide nanoparticles modified graphene for supercapacitors by laser ablation" . | Applied Surface Science 568 (2021) .
APA Zhu, Chenguang , Dong, Xia , Mei, Xuesong , Gao, Meng , Wang, Kedian , Zhao, Dongmei . General fabrication of metal oxide nanoparticles modified graphene for supercapacitors by laser ablation . | Applied Surface Science , 2021 , 568 .
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Absolute Position Acquisition for Linear Synchronous Motor With Passive Mover EI SCIE
期刊论文 | 2021 , 9 , 100757-100768 | IEEE ACCESS
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The winding segmented permanent magnet linear synchronous motor has restrictions on the last absolute position acquisition when the power goes from off to on, and the traditional absolute position acquisition systems depend on complex battery and calibration systems. Therefore, a true absolute magnetic encoder based on the Vernier principle with error rejection and decoding technology is studied in this paper. First, the output signal of the magnetic encoder with noise was subjected to the adaptive ellipse parameter correction algorithm with recursive least squares (RLS), and the source output signal predicted and reconstructed. Furthermore, the RLS was optimized by the speed weighting factor and the forgetting factor to reduce the computational pressure and the iterative process. Second, one improved double second-order generalized integrator(DSOGI) decoding technology was investigated by extracting and separating the symmetric-positive sequence components in the unbalanced signal, and, using the phase-locked loop technique for tracking calculation, accurate speed and angle obtained. The adaptive ellipse parameter fitting algorithm effectively reduced the problem of overshoot and steady-state error of the DSOGI, which provides a practical and theoretical basis for the future application of the magnetic encoder. This trajectory arrangement not only avoids the influence of accumulated error on the accuracy of encoder, but it also solves the contradiction between high resolution and small volume, and the advantages over the special decoding chip IC-Haus were also verified by comprehensive experimental results.

Keyword :

Magnetic separation Absolute magnetic encoder Phase locked loops Logic gates Decoding Magnetic susceptibility Vernier decoding winding segmented permanent magnet linear synchronous motor (WS-PMLSM) Magnetic circuits Synchronous motors recursive-least-squares dual second-order generalized integrator (RLS-DSOGI) ellipse parameter identification

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GB/T 7714 Zhang, Tuanshan , Mei, Xuesong , Du, Xin . Absolute Position Acquisition for Linear Synchronous Motor With Passive Mover [J]. | IEEE ACCESS , 2021 , 9 : 100757-100768 .
MLA Zhang, Tuanshan et al. "Absolute Position Acquisition for Linear Synchronous Motor With Passive Mover" . | IEEE ACCESS 9 (2021) : 100757-100768 .
APA Zhang, Tuanshan , Mei, Xuesong , Du, Xin . Absolute Position Acquisition for Linear Synchronous Motor With Passive Mover . | IEEE ACCESS , 2021 , 9 , 100757-100768 .
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Control Performance Evaluation of Serial Urology Manipulator by Virtual Prototyping EI SCIE
期刊论文 | 2021 , 34 (1) | Chinese Journal of Mechanical Engineering (English Edition)
WoS CC Cited Count: 1
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Prostatic hyperplasia and tumor are common diseases, and the minimally invasive surgery inserting the instruments through the urethra into the prostate is commonly conducted. Taking the robotic manipulator for such surgery into consideration, this paper analyses the workspace of the end effector, and proposes the distribution error of the fixed point and the tracking error of manipulator end effector on the cone bottom surface of the workspace as the basis for control implementation of the manipulator. The D-H coordinate system of the manipulator is established and the trajectory planning of the end effector in the Cartesian space is carried out. The digital model was established, and dynamics simulation was performed in Solidworks and Matlab/Simulink environment to guide the manipulator design. Trajectory mapping and synchronization control between virtual model and the actual manipulator are realized based on digital twin technique. The virtual manipulator can reflect the real-time state of the manipulator with data interaction by comparing the dynamics simulation results with the motor current values obtained by experiment. Experiment was carried out with PD feedback control and Newton–Euler dynamics based feedforward control to get the trajectory tracking characteristic of each motor, errors of the fixed point and tracking performance of the end effector of the manipulator. The results show that compared with PD feedback control, feed forward control implementation can achieve a reduction of 30.0% in the average error of the fixed point of the manipulator and a reduction of 33.3% in the maximum error. © 2021, The Author(s).

Keyword :

Feedback control Robot programming Industrial manipulators Robotic surgery Urology Manipulators End effectors Dynamics MATLAB Trajectories Errors Surgery Virtual prototyping Digital twin Feedforward control

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GB/T 7714 Shi, Hu , Li, Jiajie , Guo, Lianjie et al. Control Performance Evaluation of Serial Urology Manipulator by Virtual Prototyping [J]. | Chinese Journal of Mechanical Engineering (English Edition) , 2021 , 34 (1) .
MLA Shi, Hu et al. "Control Performance Evaluation of Serial Urology Manipulator by Virtual Prototyping" . | Chinese Journal of Mechanical Engineering (English Edition) 34 . 1 (2021) .
APA Shi, Hu , Li, Jiajie , Guo, Lianjie , Mei, Xuesong . Control Performance Evaluation of Serial Urology Manipulator by Virtual Prototyping . | Chinese Journal of Mechanical Engineering (English Edition) , 2021 , 34 (1) .
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Remaining Useful Life Prediction of Ball Screw Using Precision Indicator (vol 70, 3519509, 2021) SCIE
期刊论文 | 2021 , 70 | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
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GB/T 7714 Yang, Hanbo , Jiang, Gedong , Sun, Zheng et al. Remaining Useful Life Prediction of Ball Screw Using Precision Indicator (vol 70, 3519509, 2021) [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2021 , 70 .
MLA Yang, Hanbo et al. "Remaining Useful Life Prediction of Ball Screw Using Precision Indicator (vol 70, 3519509, 2021)" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 70 (2021) .
APA Yang, Hanbo , Jiang, Gedong , Sun, Zheng , Zhang, Zhuoni , Zhao, Fei , Tao, Tao et al. Remaining Useful Life Prediction of Ball Screw Using Precision Indicator (vol 70, 3519509, 2021) . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2021 , 70 .
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Remaining Useful Life Prediction of Ball Screw Using Precision Indicator EI SCIE
期刊论文 | 2021 , 70 | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
WoS CC Cited Count: 1
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Abstract :

Remaining useful life (RUL) prediction has been receiving increasing attention in industry and academia due to its advantages in ensuring safety, reducing costs, and improving efficiency. For industrial manufacturing, the ball screw is an indispensable high-precision servo component. There is an urgent need to predict its RUL to guarantee machining precision. However, establishing a reliable and accurate physical model is a thorny issue as sophisticated mechanical characteristics are difficult to obtain. Besides, the limited degradation data reduces the prediction accuracy of data-driven methods. This article presents a hybrid RUL prediction architecture of ball screws. First, to track the precision degradation process, the backlash is proposed as a novel nonlinear precision indicator. Then, physical- and data-driven methods are strategically leveraged to reveal the precision degradation process of the ball screw, where the stochastic degradation model is constructed and its initial parameters are estimated by data-driven methods. The effectiveness of the method is experimentally demonstrated through the designed platform and compared with commonly used methods.

Keyword :

Backlash ball screw precision hybrid remaining useful life (RUL)

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GB/T 7714 Yang, Hanbo , Jiang, Gedong , Sun, Zheng et al. Remaining Useful Life Prediction of Ball Screw Using Precision Indicator [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2021 , 70 .
MLA Yang, Hanbo et al. "Remaining Useful Life Prediction of Ball Screw Using Precision Indicator" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 70 (2021) .
APA Yang, Hanbo , Jiang, Gedong , Sun, Zheng , Zhang, Zhuoni , Zhao, Fei , Tao, Tao et al. Remaining Useful Life Prediction of Ball Screw Using Precision Indicator . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2021 , 70 .
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