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Hydrogen Purification Performance of Pressure Swing Adsorption Based on Cu-BTC/zeolite 5A Layered Bed

Journal of Wuhan University of technology(Materials Science) 2022年第5期37卷 815-822页

作者： SUN Kang YANG Tianqi MA Shuo YE Feng XIAO Jinsheng Hubei Research Center for New Energy&Intelligent Connected Vehicle and Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive EngineeringWuhan University of TechnologyWuhan430070China Intelligent Manufacturing and Automobile School Chongqing College of Electronic EngineeringChongqing401331China School of Artificial Intelligence Jianghan UniversityWuhan430056China

A pressure swing adsorption (PSA) hydrogen purification model for the four-component gas (H_(2)/CO_(2)/CH_(4)/CO=73/16/8/3 mol%) in a layered bed packed with Cu-BTC and zeolite 5A was established to achieve better hydrogen purification *** comparing its simulation results with the experimental data,the adsorption isotherm model was validated and could be used to accurately describe the adsorption process of the gas mixture on the two *** breakthrough curves of the mixed gas on the layered bed were studied to verify the correctness of the established simulation *** on the validated model,the performance of the PSA system based on the layered bed was carried out,including the hydrogen purity and *** simulation results show that the hydrogen purification system based on the layered bed model can achieve hydrogen purity of 95.469% and hydrogen recovery of 83.219%.Moreover,a parametric study was carried out and its results show that reductions in feed flow rate and adsorption time result in an increase in hydrogen purity and a decrease in hydrogen recovery.A longer equalization time between the two adsorption beds can simultaneously increase the hydrogen purity and recovery.

关键词： hydrogen purification pressure swing adsorption layered bed Cu-BTC zeolite 5A

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Integrating Odometry and Inter-vehicular Communication for Adaptive Cruise Control with Target Detection Loss

Integrating Odometry and Inter-vehicular Communication for A...

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2018 IEEE Intelligent Vehicles Symposium, IV 2018

作者： Lin, Yuan Wu, Chaoxian Eskandarian, Azim Mechanical Engineering Virginia Tech BlacksburgVA24061 United States Hubei Key Laboratory of Advanced Technology for Automotive Components Automobile Engineering Institute Wuhan University of Technology Wuhan Hubei Province430000 China

ISBN: (纸本)9781538644522

Adaptive Cruise Control (ACC) systems utilize distance sensors and control algorithms to enable a vehicle to follow its preceding vehicle with desired headways. There are situations when distance sensors may lose the target, i.e., the preceding vehicle, when unfavorable weather conditions result in low reflectance or the preceding vehicle escapes the sensor's angle of view on curvy roads. In these situations, a common strategy is to suppress acceleration and maintain current speed (Cruise Control) until the sensor detects the preceding vehicle again. In this paper, we propose a new solution which integrates odometry and inter-vehicular communication to enable vehicle following for the period of target detection loss. With intervehicular communication, a following vehicle can obtain the odometry data of its preceding vehicle to compute the intervehicle distance. This work focuses on the design of an ACC system that can enable vehicle following during short-term target detection loss. The feasibility of the system design is validated through mobile robot experiments. Autonomous lane keeping capability is developed such that the mobile robots move according to the center of the lane. The robot following experiment results show that with accurate odometry and lane centering, the proposed system design can maintain desired headway following. © 2018 IEEE.

关键词： Mobile robots

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Non-negligible role of gradient porous structure in superelasticity deterioration and improvement of NiTi shape memory alloys

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Journal of Materials Science & technology 2024年第19期186卷 48-63页

作者： Yintao Zhang Daixiu Wei Yang Chen Lechun Xie Liqiang Wang Lai-Chang Zhang Weijie Lu Guang Chen State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of EducationNanjing University of Science and TechnologyNanjing 210094China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Engineering Edith Cowan University270 Joondalup DriveJoondalupWA 6027Australia

Bone-mimicking gradient porous NiTi shape memory alloys(SMAs)are promising for orthopedic im-plants due to their distinctive superelastic functional ***,premature plastic deformation in weak areas such as thinner struts,nodes,and sharp corners severely deteriorates the superelasticity of gradient porous NiTi *** this work,we prepared gradient porous NiTi SMAs with a porosity of 50%by additive manufacturing(AM)and achieved a remarkable improvement of superelasticity by a simple solution treatment *** solution treatment,phase transformation temperatures dropped signif-icantly,the dislocation density decreased,and partial intergranular Ti-rich precipitates were transferred into the *** to as-built samples,the strain recovery rate of solution-treated samples was nearly doubled at a pre-strain of 6%(up to 90%),and all obtained a stable recoverable strain of more than 4%.The remarkable superelasticity improvement was attributed to lower phase transformation tem-peratures,fewer dislocations,and the synergistic strengthening effect of intragranular multi-scale Ti-Ni ***,the gradient porous structure played a non-negligible role in both superelasticity deterioration and *** microstructure evolution of the solution-treated central strut after constant 10 cycles and the origin of the stable superelastic response of gradient porous NiTi SMAs were *** work provides an accessible strategy for improving the superelastic performance of gra-dient porous NiTi SMAs and proposes a key strategy for achieving such high-performance architectured materials.

关键词： Shape memory alloys Superelasticity Gradient porous structure Solution treatment Stable recoverable strain

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Effect of ball milling time on the microstructure and compressive properties of the Fe–Mn–Al porous steel

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 917-929页

作者： Lingzhi Xie Zhigang Xu Yunzhe Qi Jinrong Liang Peng He Qiang Shen Chuanbin Wang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Wuhan Second Ship Design and Research Institute Wuhan 430205China

In the present work,Fe–Mn–Al–C powder mixtures were manufactured by elemental powders with different ball milling time,and the porous high-Mn and high-Al steel was fabricated by powder *** results indicated that the powder size significantly decreased,and the morphology of the Fe powder tended to be increasingly flat as the milling time ***,the prolonged milling duration had limited impact on the phase transition of the powder *** main phases of all the samples sintered at 640℃ were α-Fe,α-Mn and Al,and a small amount of Fe2Al5 and *** the sintering temperature increased to 1200℃,the phase composition was mainly comprised of γ-Fe and α-*** weight loss fraction of the sintered sample decreased with milling time,i.e.,8.3wt% after 20 h milling compared to15.3wt% for 10 *** Mn depletion region(MDR) for the 10,15,and 20 h milled samples was about 780,600,and 370 μm,*** total porosity of samples sintered at 640℃ decreased from ~46.6vol% for the 10 h milled powder to ~44.2vol% for 20 h milled *** sintering at 1200℃,the total porosity of sintered samples prepared by 10 and 20 h milled powder was ~58.3vol% and ~51.3vol%,*** compressive strength and ductility of the 1200℃ sintered porous steel increased as the milling time increased.

关键词： powder metallurgy porous steel ball milling time microstructure evolution compressive properties

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Near-Surface Defects Identification in water immersion ultrasonic testing based on FFT and Phase Spectrum Difference

Near-Surface Defects Identification in water immersion ultra...

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2020 IEEE Far East Forum on Nondestructive Evaluation/Testing: New technology and Application, FENDT 2020

作者： Guan, Shan-Yue Li, Li Wang, Xiao-Kai Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China

ISBN: (纸本)9781665440820

Ultrasonic pulse-echo testing always exist a near-surface blind zone, because the defect echo overlaps with the interface echo, it is difficult to accurately identify the near-surface defect. This paper presents an investigation with fast Fourier transform (FFT) combined with phase spectrum difference (PSD) for detecting near-surface defects in metal materials. Firstly, the phase spectrum of defect signal and free-defect signal are obtained by FFT, and the PSD between them is calculated. The FFT is utilized again to acquire the main frequency and corresponding period of PSD. Then, the offset time is proposed to represent the location of the near-surface defects. The theoretical correctness of the proposed method is validated by the ultrasonic simulation signals of single defect, multi-defects and noise interference in the near-surface blind zone. Finally, the water immersion ultrasonic testing experiment is carried out to detect the near-surface artificial defects of test specimens from a large ring forging. The experimental result revealed that the calculation of near-surface defects depth by offset time has high accuracy. © 2020 IEEE.

关键词： Fast Fourier transforms

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Investigation on Transport Phenomena and Molten Pool Dynamics during Laser Melting Deposition of Ti-6Al-4V 2

Investigation on Transport Phenomena and Molten Pool Dynamic...

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2nd International Conference on Smart Energy and New Power Systems, SENPS 2024

作者： Wu, Yongjian Zhou, Jian Wen, Yan Xie, Lechun Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China

The physical phenomena involved in laser melting deposition are extremely complex, including solid-liquid phase transition, gas-liquid interface coupling, the Marangoni effect, and others factors. A novel multiphase model is proposed to describe the evolution of gas-liquid-solid interface during the laser melting deposition process of Ti-6Al-4V. Based on the volume of fluid (VOF) method, a volume fraction gradient method is introduced to accurately track the motion of the free surfaces. The model can simulate alterations in temperature and flow fields during deposition, predict the geometric configurations of the melt pool and deposition layer, and shows minimal deviation from the experimental data, thereby providing a significant reference value. © Published under licence by IOP Publishing Ltd.

关键词： Gradient methods

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A Comparative Study of Equivalent Factor Optimization Based on Heuristic Algorithms for Hybrid Electric Vehicles

SAE International journal of Sustainable Transportation, Ene...

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SAE International journal of Sustainable Transportation, Energy, Environment, and Policy 2022年第2期3卷

作者： Zheng, Qingxing Tian, Shaopeng Wang, Wenbin Zhang, Qian Cai, Wen Wuhan University of Technology School of Automotive Engineering China Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components China Hubei Collaborative Innovation Center for Automotive Components Technology China Wuhan University of Technology Hubei Research Center for New Energy & Intelligent Connected Vehicle China

The equivalent consumption minimization strategy (ECMS) is an instantaneous optimization method implemented online for hybrid electric vehicles (HEVs) to improve fuel economy. To fulfill the near-optimal performance of ECMS, equivalent factors (EFs) must be well tuned for different powertrains and driving cycles. This study proposes a hierarchical offline optimization framework which tunes the penalty value of state of charge (SOC) balance in the outer layer and optimizes EFs based on heuristic algorithms in the inner layer. A comprehensive analysis is conducted to evaluate three heuristic algorithms, including the genetic algorithm (GA), the nonlinear-inertia-decreasing particle swarm optimization algorithm (NLPSO), and the novel firefly algorithm (FA). The traversal optimization method (TOM) is chosen as the benchmark. Besides, a sensitivity analysis is carried out to reveal the impact of the penalty value on the battery SOC balance. The simulation results confirm that the battery SOC balance positively relates to the penalty value. However, the biggest penalty value is not always the optimal choice. The comparative results show that the GA and NLPSO can lessen 99.86% and 99.87% of the computational burden but increase the fuel consumption by 4.44% and 4.26%, respectively, compared to TOM. On the other hand, FA can reduce computational time by 99.87% with a 1.85% loss of fuel economy, which is superior to the other two heuristic algorithms in terms of optimality and computational cost. © 2022 SAE International.

关键词： Heuristic algorithms

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Simulation Study on Vehicle Road Performance with Hydraulic Electromagnetic Energy-Regenerative Shock Absorber

Simulation Study on Vehicle Road Performance with Hydraulic ...

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SAE 2016 World Congress and Exhibition

作者： Peng, Ming Guo, Xuexun Zou, Junyi Zhang, Chengcai Wuhan University of Technology School of Automotive Engineering Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Centre for Automotive Components Technology Wuhan430010 China

This paper presents a novel application of hydraulic electromagnetic energy-regenerative shock absorber (HESA) into commercial vehicle suspension system and vehicle road performance are simulated by the evaluating indexes (e.g. root-mean-square values of vertical acceleration of sprung mass, dynamic tire-ground contact force, suspension deflection and harvested power;maximum values of pitch angle and roll angle). Firstly, the configuration and working principle of HESA are introduced. Then, the damping characteristics of HESA and the seven-degrees-of-freedom vehicle dynamics were modeled respectively before deriving the dynamic characteristics of a vehicle equipped with HESA. The control current is fixed at 7A to match the similar damping effect of traditional damper on the basis of energy conversion method of nonlinear shock absorber. Compared with the vehicle equipped with conventional shock absorber under the same excitation conditions of random road and vehicle speed, vehicle dynamics response and energy-regenerative potential of HESA suspension system are analyzed. Judging with the first three main evaluating indexes, the numerical differences between HESA equipped vehicle and conventional one in the vertical acceleration of sprung mass is within 9.2%, the dynamic tire-ground contact force is within 2.2%, and the suspension deflection is within 6.1%. The handling stability of fixed current control and failure mode of HESA is comparatively analyzed. Moreover, when offering reliable damping force for vehicle suspension system, HESA could regenerate power from 41.72 to 339.88 W (RMS) with vehicle speed ranging from 30 to 70 km/h on Class B and Class C random road. © Copyright 2016 SAE International.

关键词： Roads and streets

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Simulation and Analysis of Vehicle Performance Based on Different Cycle Conditions 6th

Simulation and Analysis of Vehicle Performance Based on Diff...

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6th International Conference on Frontier Computing, FC 2018

作者： Wu, Yangmin Liu, Zhien Xi, Guangwei Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China

ISBN: (纸本)9789811336478

In this paper, the vehicle dynamics simulation model of a vehicle model is established according to the structure of the vehicle and the performance parameters of each part of the vehicle, and the performance prediction model of the NEDC cycle, the WLTC cycle, and the China cycle (CHINA VI) are constructed. The differences effects of three test cycle on vehicle dynamics, fuel economy, and vehicle emission performance are studied. And provide a theoretical basis for the matching of engines and vehicles and the selection of different emission technology routes. © 2019, Springer Nature Singapore Pte Ltd.

关键词： Vehicle performance

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Application of cylindrical phase shift migration algorithm with vector coherence factor(CPSM-VCF) on Ultrasonic Imaging Detection of Bearing ring

Application of cylindrical phase shift migration algorithm w...

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2023 IEEE Far East NDT New technology and Application Forum, FENDT 2023

作者： Dai, Shu-Tong Wang, Xiao-Kai Guan, Shan-Yue Li, Yi-Xuan Li, Li Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China

ISBN: (纸本)9798350303544

Precision bearings are key transmission components of high-speed machine tools, trains and industrial robots, which always under high load and high-speed work condition. Internal cracks can easily cause the fracture failure of the bearings. Therefore, this paper proposes a cylindrical phase shift migration (CPSM) algorithm combined with vector coherence factor(VCF) for ultrasonic imaging detection of bearing rings. First, raw ultrasonic data is acquired by scanning along a circumference direction of a cylinder. The phase of the ultrasonic data is calculated through the Hilbert transform and Euler formula. The sine and cosine value matrixes of the phase are performed to construct the VCF. Then, the CPSM image reconstructed from original ultrasonic field is weighted by VCF. Finally, the image reconstructed by CPSM-VCF method is obtained. To verify the effectiveness of the above method, water immersion ultrasonic testing experiment of cylindrical specimen and rolled bearing ring was carried out. The results show that the signal-noise ratio (SNR) and lateral angular resolution of the reconstructed image were improved by CPSM-VCF. This research provides an efficient and low-cost ultrasonic imaging algorithm to detect rolled bearing rings. © 2023 IEEE.

关键词： Machine tools

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