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A Review of Recent Patents on Metal Precision Plastic Forming Technology

Recent Patents on engineering 2023年第2期17卷 105-119页

作者： Gao, Huaqiang Zhang, Tingliang Xie, Baocheng School of Mechanical Power and Engineering Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin150080 China

Background: Precision plastic forming technology has become an important development direction of advanced manufacturing technology because of its remarkable characteristics of high yield, high quality, and low consumption. Compared with traditional forming technology, it not only improves the utilization rate of metal materials, but also strengthens the dimensional accuracy of the workpiece. Therefore, the development trend of metal plastic precision forming technology has been paid increasing attention. Objective: To meet the increasing requirement of processing quality and processing efficiency in the metal precision plastic forming technology, metal cold precision plastic forming technology, metal warm precision plastic forming technology, metal thermal precision plastic forming technology and metal composite precision plastic forming technology is being improved continuously. Methods: This paper reviews the current various representative patents related to metal cold precision plastic forming technology, metal warm precision plastic forming technology, metal thermal precision plastic forming technology, and metal composite precision plastic forming technology. Results: Through investigating a large number of patents on metal precision plastic forming, metal cold precision plastic forming technology, metal warm precision plastic forming technology, metal thermal precision plastic forming technology and metal composite precision plastic forming technology are discussed. Conclusion: The optimization of metal precision plastic forming is conducive to increasing processing efficiency and processing quality. More relevant patents will be invented in the future. © 2023 Bentham science Publishers.

关键词： Efficiency

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Air-Ground Collaborative Control for Angle-Specified Heterogeneous Formations

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on intelligent Vehicles 2024年 1-13页

作者： Chen, Liangming Xiao, Jiaping Teo, Clarence Wei Rui Li, Jianqing Feroskhan, Mir School of System Design and Intelligent Manufacturing and Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology Shenzhen China school of Mechanical and Aerospace Engineering Nanyang Technological University Singapore Singapore College of Communication Engineering Hangzhou Dianzi University Hangzhou China

The need for better search and rescue capabilities has led to the increased demand for collaborative aerial-ground multi-robot deployments. However, most existing solutions require high communication bandwidth or bulky sensor equipment that is not suitable especially for aerial robots. To make the execution of these tasks more efficient, this paper proposes an angle-specified heterogeneous leader-follower formation framework consisting of unmanned aerial vehicles (UAVs) flying in a 3D space and ground robots moving in a 2D plane. The UAVs are controlled to maintain a desired angle-specified formation with the first three UAVs as the leaders forming a triangular shape and the remaining UAVs as the followers. The follower UAVs only need direction measurements to track the leader UAVs. For the ground robots, two leader robots track the UAV group and determine the orientation and scale of the ground formation, while the follower robots track the leader robots using only direction measurements. The proposed heterogeneous formation framework is energy-efficient as most robots only require low-cost and lightweight direction measurements. The stability of the proposed formation control algorithms is proved and validated through various physical application experiments. IEEE

关键词： Multi agent systems

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Recent advances in Ni-based catalysts for the electrochemical oxidation of ethanol

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Journal of Energy Chemistry 2024年第11期98卷 588-614页

作者： Xing Tan Shiming Chen Dafeng Yan Ruixing Du Qitong Zhong Longfei Liao Zhenchen Tang Feng Zeng State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816JiangsuChina School of Intelligent Medicine China Medical UniversityShenyang 110122LiaoningChina College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062HubeiChina School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina

The electrochemical ethanol oxidation reaction(EOR) plays a crucial role in electrochemical hydrogen production and direct ethanol fuel cells, both vital for utilizing renewable energies. Ni-based catalysts are pivotal in enabling efficient EOR, leading to the formation of acetic acid/acetaldehyde or CO_(2). These can serve as alternative anodic oxidation reactions for oxygen evolution reaction(OER) in water electrolysis or the anodic reaction for direct ethanol fuel cells, respectively. This review explores recent advancements in EOR over Ni-based catalysts. It begins with an overview of EOR performance across various Ni-based catalysts, followed by an examination of the reaction chemistry, mechanism, and active *** review then delves into strategies for designing highly active Ni-based EOR catalysts. These strategies include promotion with transition metals, noble metals, nonmetals, and carbon materials, as well as creating amorphous structures, special morphologies, and single-atom catalysts. Additionally, it discusses the concept of self-supporting catalysts using three-dimensional porous substrates. Finally, the review highlights emerging methodologies that warrant further exploration, along with future directions for designing highly active and stable EOR catalysts.

关键词： Ethanol oxidation Nickel Water electrolysis Fuel cell

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Adaptive Integral Sliding Mode Control With Gaussian Processes for AUVs

Adaptive Integral Sliding Mode Control With Gaussian Process...

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2024 China Automation Congress, CAC 2024

作者： He, Yongxu Zhao, Yuxin Xu, Geng College of Intelligent Systems Science and Engineering Harbin Engineering University Harbin China School of Automation Harbin University of Science and Technology Harbin China Qitong Technology Development Co. LTD Weihai China

ISBN: (纸本)9798350368604

This paper proposes a novel adaptive integral sliding mode control (ISMC) scheme for robust trajectory tracking of autonomous underwater vehicles (AUVs) utilizing Gaussian process (GP) regression. By incorporating GPs into the ISMC framework, the proposed control strategy exhibits robustness against significant system uncertainties and aggressive desired trajectories. The GP posterior means offer high-probability uncertainty compensation, while the posterior variances enable adaptive tuning of controller gains and learning rates. A novel adaptive gain law is introduced to prevent excessive gain growth and nonsmooth control actions near the sliding manifold. Lyapunov stability analysis guarantees that the tracking errors of the proposed scheme converge to an arbitrarily small bound within a specific probability. Simulation results demonstrate the superior transient tracking performance of the proposed method compared to both the standard GP-ISMC without gain adaptation and the adaptive GP-ISMC using standard monotonically increasing adaptive laws. © 2024 IEEE.

关键词： Sliding mode control

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Characterizing and Stage-Wise Differentiation of Coal Spontaneous Combustion in Deep Mines

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Energy engineering 2025年第4期122卷 1561-1580页

作者： Haitao Wang Pengxin Zhang Weihao Li Baogang Li Xianghui Xiong School of Resources and Engineering Department Heilongjiang University of TechnologyJixi158100China Intelligent Mine Interdisciplinary Research Institute Heilongjiang University of Science&TechnologyHarbin150022China

Deep mining,characterized by high stress,elevated geothermal gradients,and significant moisture content,significantly increases the risk of Coal Spontaneous Combustion(CSC),posing a major threat to mine *** study delves into the impact of these factors on the self-ignition properties of coal,leveraging data from four distinctmines inHeilongjiang Province,China:ShuangyashanDongrongNo.2 Mine,Hegang JundeCoal Mine,Qitaihe Longhu Coal Mine,and Jixi Ronghua *** have honed the theoretical framework to account for variations in gas content during *** investigation,conducted through programmed temperature rise experiments,scrutinized the generation and temperature-dependent evolution of gases,emphasizing individual indicators such as CO,O_(2),and CxHy,in addition to composite indicators like the ratio of change in CO to change in O_(2) concentration(∂C_(CO)/∂t:−∂C_(O_(2))/∂t)and the ratio of C2H4 to C_(2)H_(6).These insights have catalyzed the development of a CSC state energy level transition model and a precise method for phase-based quantification of combustion *** findings furnish a scientific foundation for the formulation of early warning and prevention strategies in deep mining settings.

关键词： Deep mine coal spontaneous combustion gas change rate index threshold

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Research on Foothold Optimization of the Quadruped Crawling Robot based on Reinforcement Learning

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Recent Patents on Mechanical engineering 2024年第1期17卷 11-22页

作者： Liu, Xiulian Wang, Peng Dong, Renquan School of Intelligent Manufacturing and Elevator Huzhou Vocational & Technical College Zhejiang Huzhou313099 China School of Mechatronic Engineering Zhejiang Business Technology Institute Zhejiang Ningbo315012 China School of Mechanical and Power Engineering Harbin University of science and Technology Heilongjiang Harbin150000 China

Background: Quadruped crawling robots will be faced with stability problems when walking on a raised slope. The stability of robot is affected by gait planning and selection of its foothold in this terrain. The slope reaction force on anterior and posterior legs is uneven. The selection strategy of its foothold should achieve good performance for the stability of the quadruped crawling robot. Objective: Aimed at the uneven problem of slope reaction force on the anterior and posterior legs of the quadruped crawling robot when walking on the raised slope, a patent method for foothold optimization using reinforcement learning based on strategy search is proposed.. Methods: The kinematic model of the quadruped crawling robot is created in D-H coordinate method. According to the gait timing sequence method, the frame description of the quadruped crawling robot's gait on the slope is proposed. The fitting polynomial coefficients and fitting curves of all joints of the leg can be obtained by using the polynomial fitting calculation method. The reinforcement learning method based on Q-learning algorithm is proposed to find the optimal foothold by interacting with the slope environment. Comparative simulation and test of other gait and climbing slope gait, the climbing slope gait with and without the Q-learning algorithm is carried out by MATLAB platform. Results: When the quadruped crawling robot adopts the reinforcement learning method based on Qlearning algorithm to select foothold, the robot posture curves are compared without optimization strategy. The result proves that the selection strategy of its foothold is valid. Conclusion: The selection strategy of its foothold with reinforcement learning based on Q-learning algorithm can improve the stability of the quadruped crawling robot on the raised sloped. © 2024 Bentham science Publishers.

关键词： Reinforcement learning

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A Review of Recent Patents on intelligent Bearings

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Recent Patents on engineering 2023年第1期17卷 73-84页

作者： Zhao, Yanling Wu, Chuanwang Pan, Chengyi Bao, Yudong School of Mechanical and Power Engineering Harbin University of Science and Technology Heilongjiang Province Harbin150080 China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin150080 China

Background: The large amount of data generated by intelligent bearings still needs to be processed manually, which results in low efficiency, untimely access to status and fault diagnosis information, and a lack of the best maintenance period for machinery and equipment. Objective: By analyzing the research achievements and patents on intelligent bearings, a summary of the development trend provides a reference for the development of intelligent bearings. Methods: This paper introduces the key technologies associated with intelligent bearings and reviews various representative patents relating to intelligent bearings. The advantages and disadvantages of these patents are also analyzed. Results: At present, the development of intelligent bearing technology relies primarily on the sensor bearing. Most intelligent bearing patents have utilized the bearing gap to best arrange monitoring devices, and in some cases, the bearing structure has been changed to obtain the best arrangement. These intelligent bearings can achieve a degree of self-monitoring. For the integration of detection data processing and big data, research on the self-adaptation aspect of bearing is the initial step. Conclusion: Adapting to the host operation requirements is the direction of the development of intelligent bearings, and this requires intelligent bearings to involve self-awareness, self-decision, self-diagnosis, and self-adaptation functions. In the future, these functions should be realized from the perspectives of systematization, diversification of monitoring information, and intelligent data analysis. © 2023 Bentham science Publishers.

关键词： Failure analysis

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A Patent Review of Lung-airway Modeling with Tangential Digital Twin Technology

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Recent Patents on engineering 2023年第1期17卷 102-121页

作者： Bao, Yudong Li, Xu Zhao, Yanling Qu, Shengqian School of Mechanical and Power Engineering Harbin University of Science and Technology Heilongjiang Province Harbin150080 China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin150080 China

Background: The digital twin as an integrated technology has been widely used in the medical field. Currently, the application of digital twin technology in the field of respiratory science is mostly theoretical exploration, with less applied technical research. Therefore, this has greatly limited the development of lung-airway models and devices that cope with digital twin technology in clinical settings and has also hindered the development of digital twin technology. Objective: The aim of this study is to propose an effective physical model to simulate the human environment as an efficient means to develop and improve the digital twin technology. Methods: A representative set of patents related to physical models of the respiratory tract and lungs is presented, including methods for model building and ways to assess and predict the diagnosis of respiratory diseases. Results: Current patents are analyzed and compared in three aspects: physical models, model building methods, and respiratory disease assessment and prediction. A digital twin modeling approach, including mechanical effects, biological evolution, physiological tissue changes, and physical entity coupling is proposed based on the hardware support involved in rapid prototyping techniques and method patents. The advantages and disadvantages of the existing models are analyzed, and the systematicity, applicability, modeling techniques, and fidelity of the digital twin physical model are discussed. Conclusion: Lung airway models are already based on complete morphological data, but purely physical models cannot reproduce the real environment of the human body. Therefore, in order to reach the heights of digital twins, the intervention of numerical theory and related auxiliary hardware is often required. © 2023 Bentham science Publishers.

关键词： Pulmonary diseases

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A Review of Soft Crawling Robots with Different Driving Methods

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Recent Patents on engineering 2024年第1期18卷 85-109页

作者： Tang, Dedong Wang, Gang Tang, Chunyang Yu, Wenzhuo Lv, Xin Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education School of Mechanical Power Engineering Harbin University of Science and Technology Harbin150080 China Department of Automation Tsinghua University Beijing100084 China

Background: Traditional rigid robots are difficult to adapt to complex unstructured environments due to their limited degree of freedom and lack of flexibility. Therefore, soft crawling robots are concerned widely by their powerful deformation ability, infinite number of degrees of freedom, and effective interaction with humans. Objective: This paper aims to report the recent progress of soft crawling robots and provide a reference for readers in this field. Methods: By reading and summarizing the patents and papers related to soft crawling robots in recent years, they are divided into three categories according to different driving methods. The structure, motion mechanism, characteristics, and applications of each class of robots are compared and analyzed. Results: The advantages and disadvantages of each driving method are analyzed, and the key issues in soft crawling robots are pointed out. Based on this, the future development direction of this research field is predicted. Conclusion: The study shows that according to the driving method, soft crawling robots are classified as pressure driven, motor-wire driven, and soft active material driven. In addition, the characteristics of each drive are summarized. In the future, soft crawling robots will have more potential applications in biomedicine, outdoor survey, rescue search, and inspection and maintenance of equipment. © 2024 Bentham science Publishers.

关键词： Bionics

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An approach for formation design and flight performance prediction based on aerodynamic formation unit:Energy-saving considerations

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Chinese Journal of Aeronautics 2024年第3期37卷 77-91页

作者： Nanxuan QIAO Tielin MA Xiangsheng WANG Jie WANG Jingcheng FU Pu XUE School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Institute of Unmanned System Beihang UniversityBeijing 100191China Key Laboratory of Advanced Technology of Intelligent Unmanned Flight System Ministry of Industry and Information TechnologyBeijing 100191China School of Transportation Science and Engineering Beihang UniversityBeijing 102206China Beijing Institute of Space Long March Vehicle Beijing 100076China

The performance improvement of swarm drones through aerodynamic shape optimization may be challenging due to folded size constraints imposed by the specific launch ***,fixed-wing aircraft swarms can benefit from formation flight in terms of energy *** study introduces the concept of the"aerodynamic formation unit",which consists of two or three aircraft that form an inseparable unit of the *** the Unmanned Aerial Vehicle(UAV)distribution and wingtip vortex interference in the formation,two typical aerodynamic formation units are optimized by the variable-fidelity aerodynamic optimization method based on space *** aerodynamic characteristics of the formation UAVs that affect flight performance,such as lift-to-drag ratio(L/D ratio)and static stability are analyzed by Computational Fluid Dynamics(CFD)*** L/D ratio(cruising condition)of the following aircraft can be increased by 22.8%and 57.5%in the optimal units that involve two and three aircraft ***,this study conducts several CFD simulations for multi-aircraft formations formed by the units,which show that the average L/D ratio of the formation can be improved by more than 19%.These results verify the feasibility and effectiveness of the"aerodynamic formation unit"concept and the optimization framework for formation parameters.

关键词： Formation flight CFD Aerodynamic formation unit Wingtip vortices Foldable tandem-wing aircraft

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