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Temporal Logic-Guided DQN for Object Delivery and Transportation Using Magnetic Microrobots With Local Control

IEEE Robotics and Automation Letters 2025年第6期10卷 5441-5448页

作者： Hou, Zhe Liu, Yueyue Fan, Qigao Jiangnan University School of Internet of Things Engineering Wuxi214122 China Guangxi University of Science and Technology Guangxi key laboratory of Automobile Components and Vehicle Technology Liuzhou545006 China

Microrobots driven by magnetic fields hold significant promise in medical applications, particularly in drug delivery–a key area in the biomedical field. Traditional approaches primarily rely on global magnetic fields to control single microrobots, which makes it challenging to independently control multiple microrobots. To address this limitation, this letter introduces a local magnetic field generation system that enables independent control of multiple microrobots. The proposed system employs a printed circuit board (PCB) array-based magnetic microrobot system, utilizing a microcoil array for precise and localized control. To enhance task execution, we integrate Deep Reinforcement Learning (DRL) with Linear Temporal Logic (LTL) to generate obstacle-avoiding paths for single and dual magnetic microrobots. The system is validated through magnetic droplet transport experiments. Experimental results demonstrate the effectiveness of the proposed system in achieving autonomous multi-task drug delivery and droplet fusion. This work underscores the potential of magnetic field-driven microcoil array systems in advancing transportation and drug delivery technologies in biomedical engineering. © 2016 IEEE.

关键词： Deep reinforcement learning

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Complex retraction equivalent source method for solving external acoustic problems

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Chinese Journal of Acoustics 2025年第1期44卷 45-65页

作者： CHEN Jie XIANG Yu SHI Ziyu School of Mechanical and Automotive Engineering Guangxi University of Science and TechnologyLiuzhou 545006 Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and TechnologyLiuzhou 545006 Institute of Sound and Vibration Research Hefei University of TechnologyHefei 230009

In order to overcome the non-unique solution problem of the conventional equivalent source method at the corresponding eigenfrequency,the basic guidelines of adding virtual damping into the equivalent source method is proposed according to the damping characteristics of the imaginary part of the coordinates of the equivalent source *** complex source point constructed by complex retraction is used to add virtual damping to the equivalent source system,and a complex retractive equivalent source method with unique solution in full wavenumber domain is *** mechanism of the complex retraction equivalent source method in overcoming the non-unique solution problem is described in accordance with the zero-point characteristic of the characteristic indicator function,involving the theory,modeling method and selection of damping *** simulation and analysis of typical acoustic radiation and acoustic scattering problems indicate that the present method can obtain the unique solution in the entire frequency domain simply and effectively for arbitrarily shaped acoustic *** computational accuracy and efficiency are equivalent to the conventional equivalent source method,which solves the problem of poor adaptability of the complex radius vector method.

关键词： Equivalent source method Complex source point Virtual damping Nonuniqueness Eigenfrequency

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Strengthening of CMAS corrosion resistance of thermal barrier coatings by surface Al-Ce modification

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Surface and Coatings technology 2025年 510卷

作者： Wang, Haodong Zhuo, Xueshi Zhang, Jungui Cheng, Dingxiang Dong, Hao Lin, Xiankun Qin, Boying Mao, Jie Deng, Chunming Zhang, Xiaofeng Guangxi Key Laboratory of Automobile Components and Vehicle Technology School of Mechanical and Automotive Engineering Guangxi University of Science & Technology Liuzhou545006 China National Engineering Laboratory for Modern Materials Surface Engineering Technology Institute of New Materials Guangdong Academy of Science Guangzhou510651 China State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an710054 China School of Materials Science and Engineering Shandong University Jinan250061 China

Molten Calcium-Magnesium-Aluminum-Silicate (CMAS) corrosion poses a significant challenge to the long-term durability of plasma-sprayed physical vapor deposition (PS-PVD) thermal barrier coatings(7YSZ TBCs). In this work, a novel two-element surface modification method is proposed to improve the corrosion resistance of 7YSZ TBCs against CMAS. The reaction mechanism of the Al-Ce modified layer is investigated. Experimental results from CMAS corrosion test demonstrate that the penetration of molten CMAS is effectively inhibited by the protective Al2O3 and CeAlO3 layers. The wetting and spreading behavior of molten CMAS on both the as-sprayed and Al-Ce modified coatings was observed in situ at 1200 °C for 3600 s. The Al-Ce modified coatings exhibited excellent CMAS corrosion resistance, providing a promising solution to the limitations of the feather-like columnar structure in PS-PVD TBCs. © 2025 Elsevier B.V.

关键词： Corrosion resistant coatings

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Simulation Analysis of Torsion Beam Hydroforming Based on the Fluid-Solid Coupling Method

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 139-156页

作者： Yu Huang Jian Li Jiachun Yang Yongdong Peng Weixuan Zhang Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and TechnologyLiuzhou545006GuangxiChina

Hydroformed parts are widely used in industrial automotive parts because of their higher stiffness and fatigue strength and reduced weight relative to their corresponding cast and welded *** paper reports a hydraulicforming experimental platform for rectangular tube fittings that was constructed to conduct an experiment on the hydraulic forming of rectangular tube fittings.A finite element model was established on the basis of the fluid–solid coupling method and simulation *** correctness of the simulation analysis and the feasibility of the fluid–solid coupling method for hydraulic forming simulation analysis were verified by comparing the experimental results with the simulation *** the basis of the simulation analysis of the hydraulic process of the torsion beam using the fluid–solid coupling method,a sliding mold suitable for the hydroforming of torsion beams was designed for its structural *** effects of fluid characteristics,shaping pressure,axial feed rate,and friction coefficient on the wall thicknesses of torsions beams during formation were *** movement speed was related to tube *** pressure had a significant effect on rounded corners and straight *** axial feed speed was increased,and the uneven distribution of wall thicknesses was effectively *** the friction coefficient had a nonsignificant effect on the wall thickness of the ladder-shaped region,it had a significant influence on a large deformation of wall thickness in the V-shaped *** this paper,a method of fluid-solid coupling simulation analysis and sliding die is proposed to study the high pressure forming law in torsion beam.

关键词： Fluid-solid coupling Hydraulic expansion Rectangular tube Torsional beam Wall thickness distribution

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Ysz-Based Infrared Emissivity Performance of Electroplated Pt Composite Coatings

SSRN

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SSRN 2025年

作者： Zhang, Jingqin Zhuang, Tong Zhang, Xiaofeng Meng, Zihao Wu, Jian Yang, Wenchao Zhan, Yongzhong School of Resources Environment and Materials Guangxi University Guangxi Nanning530004 China National Engineering Laboratory for Modern Materials Surface Engineering Technology Institute of New Materials Guangdong Academy of Sciences Guangzhou510651 China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science & Technology Liuzhou545006 China School of Materials Science and Engineering Jingdezhen Ceramic University Jingdezhen333403 China School of Materials Science and Engineering Central South University Changsha410083 China

This study aims to examine the infrared emissivity characteristics of electroplated platinum composite coatings derived from yttria-stabilized zirconia (YSZ) ceramic coatings within the temperature range of ambient conditions to 1000 °C. Infrared emissivity tests were performed at temperatures of 25 °C, 600 °C, 800 °C, and 1000 °C, and the infrared emissivity of several coatings at ambient temperature after prolonged oxidation was assessed. The results indicate that the infrared emissivity of the composite coatings increases substantially as the temperature increases. The composite coatings with a YSZ-Al-Pt structure exhibit the least significant trend in infrared emissivity as the temperature increases. In comparison to Ni and Cr, the composite coatings exhibit optimal oxidation resistance and thermal shock resistance when the intermediate layer is composed of Al. © 2025, The Authors. All rights reserved.

关键词： Yttria stabilized zirconia

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Acoustic radiation from the submerged circular cylindrical shell treated with active constrained layer damping

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Chinese Physics B 2015年第12期24卷 361-372页

作者：袁丽芸向宇陆静蒋红华 Department of Automotive and Transportation Guangxi University of Science and Technology Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and Technology

Based on the transfer matrix method of exploring the circular cylindrical shell treated with active constrained layer damping（i.e., ACLD）, combined with the analytical solution of the Helmholtz equation for a point source, a multi-point multipole virtual source simulation method is for the first time proposed for solving the acoustic radiation problem of a submerged ACLD shell. This approach, wherein some virtual point sources are assumed to be evenly distributed on the axial line of the cylindrical shell, and the sound pressure could be written in the form of the sum of the wave functions series with the undetermined coefficients, is demonstrated to be accurate to achieve the radiation acoustic pressure of the pulsating and oscillating spheres respectively. Meanwhile, this approach is proved to be accurate to obtain the radiation acoustic pressure for a stiffened cylindrical shell. Then, the chosen number of the virtual distributed point sources and truncated number of the wave functions series are discussed to achieve the approximate radiation acoustic pressure of an ACLD cylindrical shell. Applying this method, different radiation acoustic pressures of a submerged ACLD cylindrical shell with different boundary conditions, different thickness values of viscoelastic and piezoelectric layer, different feedback gains for the piezoelectric layer and coverage of ACLD are discussed in detail. Results show that a thicker thickness and larger velocity gain for the piezoelectric layer and larger coverage of the ACLD layer can obtain a better damping effect for the whole structure in general. Whereas, laying a thicker viscoelastic layer is not always a better treatment to achieve a better acoustic characteristic.

关键词： active constrained layer damping submerged circular cylindrical shell acoustic radiation multipoint multipole nethod wave functions

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Synthesis of hierarchical Co@CNT/3DNG: a highly efficient cathode catalyst for Li–CO 2 battery

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Electrochimica Acta 2025年

作者： Qian-Cheng Zhu Xu-Bo Xin Zi-Yuan Wang Lu Qiu Xiao-Ling Su De-Yu Mao School of Mechanical and Automotive Engineering Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and Technology Wenchang Street 2 Liuzhou 545006 China

The escalating energy crisis and growing global climate concerns have accelerated the advancement of renewable energy technologies. Li–CO 2 batteries (LCBs) have garnered considerable attention due to their high energy density and CO 2 fixation/conversion capabilities. However, the sluggish nature of the CO₂ reaction kinetics gives rise to high overpotential and poor cycling stability, thereby limiting practical applications. Therefore, we synthesized a hierarchical composite cathode catalyst comprising cobalt nanoparticles encapsulated in carbon nanotubes supported by nitrogen-doped three-dimensional graphene (Co@CNT/3DNG). The 3DNG framework provides high conductivity and a large surface area, while Co@CNT offers abundant active sites. The assembled LCB exhibits a high discharge capacity of 19033 mAh g -1 , a low voltage gap of 1.48 V, and a stable cycling performance over 119 cycles, demonstrating superior catalytic activity of Co@CNT/3DNG cathode.

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The Material Behavior and Fracture Mechanism of a Frangible Bullet Composite

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Chinese Physics Letters 2013年第7期30卷 143-147页

作者： LI Jian RONG Ji-Li ZHANG Yu-Ning XU Tian-Fu LI Bin Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and TechnologyLiuzhou 545006 School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081

The quasi-static and dynamic compressive mechanical properties of a bullet composite are investigated using the scattered spot technique,an electronic universal testing machine,and a Split–Hopkinson pressure *** stress-strain curves under static and dynamic loading are also obtained,and the strain rate effect is *** rupture structure is observed under a scanning electron microscope,and the microscopic damage mechanism of the bullet composite is *** show that the composite is sensitive to the strain rate,such that the compressive strength of the composite increases with increased strain *** relationship of the compressive strength and elastic modulus with the logarithmic strain rate is nonlinear.

关键词： composite strain dynamic

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Analyses of dynamic characteristics of a fluid-filled thin rectangular porous plate with various boundary conditions

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Acta Mechanica Solida Sinica 2017年第1期30卷 87-97页

作者： Yu Xiang Automotive and Transportation Engineering Collage Guangxi University of Science and Technology Liuzhou 545006 China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and Technology Liuzhou 545006 China

Based on the classical theory of thin plate and Biot theory, a precise model of the transverse vibrations of a thin rectangular porous plate is proposed. The first order differential equations of the porous plate are derived in the frequency domain. By considering the coupling effect between the solid phase and the fluid phase and without any hypothesis for the fluid displacement, the model presented here is rigorous and close to the real materials. Owing to the use of extended homogeneous capacity precision integration method and precise element method, the model can be applied in higher frequency range than pure numerical methods. This model also easily adapts to various boundary conditions. Numerical results are given for two different porous plates under different excitations and boundary conditions.

关键词： Thin rectangular porous plate Blot theory Vibration First order differential equations Extended homogeneous capacity high precision integration method

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PID Neural Net work Decoupling Control Based on Hybrid Particle Swarm Optimization and Differential Evolution

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International Journal of Automation and computing 2020年第6期17卷 867-872页

作者： Hong-Tao Ye Zhen-Qiang Li School of Electrical and Information Engineering Guangxi University of Science and TechnologyLiuzhou 545006China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and TechnologyLiuzhou 545006China

For complex systems with high nonlinearity and strong coupling,the decoupling control technology based on proportion integration differentiation(PID)neural network(PIDNN)is used to eliminate the coupling between *** connection weights of the PIDNN are easy to fall into local optimum due to the use of the gradient descent learning *** order to solve this problem,a hybrid particle swarm optimization(PSO)and differential evolution(DE)algorithm(PSO-DE)is proposed for optimizing the connection weights of the *** DE algorithm is employed as an acceleration operation to help the swarm to get out of local optima traps in case that the optimal result has not been improved after several *** multivariable controlled plants with strong coupling between input and output pairs are employed to demonstrate the effectiveness of the proposed *** results show t hat the proposed met hod has better decoupling capabilities and control quality than the previous approaches.

关键词： Particle swarm optimization differential evolution proportion integration differentiation(PID)neural network hybrid approach decoupling control.

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