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Cutting force and specific energy for rotary ultrasonic drilling based on kinematics analysis of vibration effectiveness

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Chinese Journal of Aeronautics 2022年第1期35卷 376-387页

作者： Zhen LI Songmei YUAN Jiang MA Jun SHEN Andre D.L.BATAKO College of Mechatronics and Control Engineering.Shenzhen University Shenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100083China The General Engineering&Techmology Research Institute Liverpool John Moores UniversitLiverpool L33AF.UK

Rotary ultrasonic drilling(RUD)has become an effective approach for machining advanced composites which are widely using in the field of *** cutting kinematics and the corresponding material removal mechanisms are distinct in different drilling areas during ***,these fundamentals have not been fully considered in the existing *** this research,two distinct forms of interaction induced by ultrasonic vibration were considered as impact-separation and vibratory lapping between the abrasives and *** the conditions to guarantee the effectiveness of these interactions were obtained to eliminate diminishing effects of ultrasonic *** on indentation fracture theory,the penetration depth of abrasives and the axial drilling force model was derived for *** verification tests of C/SiC composites resulted in a prediction error within 15%.Due to the minimal volume of material removed during each vibration cycle,the drilling force was more stable in vibration assisted *** specific drilling energy of RUD was firstly calculated based on the measured drilling *** was found the drilling parameters should be matched with vibration frequency and amplitude to make better usage of the advantages of ultrasonic vibration,which is critical in the vibration assisted processing of advanced materials.

关键词： Ceramic matrix composite Drilling force modelling Kinematics analysis Rotary ultrasonic drilling Specific drilling energy Vibration diminishing effect

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Exponentially convergent distributed Nash equilibrium seeking for constrained aggregative games

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Autonomous Intelligent Systems 2022年第1期2卷 71-78页

作者： Shu Liang Peng Yi Yiguang Hong Kaixiang Peng Department of Control Science&Engineering Tongji UniversityShanghai200092China Shanghai Research Institute for Intelligent Autonomous Systems Shanghai201210China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China

Distributed Nash equilibrium seeking of aggregative games is investigated and a continuous-time algorithm is *** algorithm is designed by virtue of projected gradient play dynamics and aggregation tracking dynamics,and is applicable to games with constrained strategy sets and weight-balanced communication *** key feature of our method is that the proposed projected dynamics achieves exponential convergence,whereas such convergence results are only obtained for non-projected dynamics in existing works on distributed optimization and equilibrium *** examples illustrate the effectiveness of our methods.

关键词： Distributed algorithms Aggregative games Projected gradient play Weight-balanced graph Exponential convergence

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Thermal constraint control of reversible solid oxide cell for optimal system efficiency

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International Journal of Hydrogen Energy 2025年 134卷 198-211页

作者： Xu, Yuanwu Yin, Jie Wang, Jingjing Wu, Xiao-long Peng, Jingxuan Tang, Ruifeng Zou, Suhang Fu, Xiaowei Li, Xi School of Artificial Intelligence and Automation Wuhan University of Science and Technology Hubei Wuhan430081 China School of Artificial Intelligence and Automation Key Laboratory of Image Processing and Intelligent Control of Education Ministry Huazhong University of Science and Technology Hubei Wuhan430074 China School of Information Engineering Nanchang University Jiangxi Nanchang330031 China School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore China-Poland Belt and Road Joint Laboratory on Measurement and Control Technology Huazhong University of Science and Technology Hubei Wuhan430074 China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518055 China

Reversible solid oxide cell (RSOC) demonstrates considerable promise in multimodal energy conversion architectures, particularly as a technology for hydrogen-based energy storage systems. Nevertheless, under dynamic operating regimes with time-varying current inputs, realizing time-efficient and reliable transitions to steady-state operation remains difficult. This difficulty arises from the intricate coupling of thermal, electrical, and gaseous processes within the RSOC system. This study aims to address these challenges by developing a 5 kW mathematical model of the RSOC system. The proposed model enables systematic investigation of thermal safety issues arising during current switching operations while introducing a thermal constraint control strategy to enhance both system efficiency and thermal safety performance. This efficiency-driven study employs the Grid Search algorithm to identify optimal steady-state operating points for the RSOC system, ensuring strict adherence to safety constraints across varying current inputs. Furthermore, by integrating the pre-identified optimal operating points as feedforward control with Model Predictive control (MPC)-based feedback correction, this hybrid strategy effectively mitigates stack temperature gradient overshoot while synchronously ensuring optimal system efficiency throughout current transition processes. Under simulated variable current inputs, the proposed RSOC system model and control strategy demonstrate the capability to constrain stack temperature gradient overshoot within 2.3K while enhancing transient efficiency by 5 %–8 %, achieving a peak system efficiency of 85 %. It provides a novel methodology for safe and efficient working with intermittent renewable energy. © 2025 Hydrogen Energy Publications LLC

关键词： Thermal variables control

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An Experimental research on Temperature Accuracy Algorithm in Fan Coil Thermostat 6

An Experimental Research on Temperature Accuracy Algorithm i...

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6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Ari, Yunus Cücük, Ergün Karateke, Seda Institute of Graduate Studies Istanbul University - Cerrahpaşa Electric and Electronic Engineering Istanbul34320 Turkey Control and Automation Systems Industry and Trade Inc. Department of Research and Development Ges Teknik Air Conditioning Istanbul34852 Turkey Istanbul Topkapi University Faculty of Engineering Department of Computer Engineering Istanbul34087 Turkey

ISBN: (纸本)9798350346671

The efficient operation of HVAC&R systems are based on keeping indoor temperature and air quality at an optimum level without disturbing comfort. Starting from this point, in this experimental research, the factors affecting the measurement accuracy during the room temperature detection of a wall mount fan coil thermostat were examined. Among the external effects, the effect of the device components on the measurement was focused and the solution of the measurement deviations occurred in this extent was investigated. Based on the experiments, the algorithm that must be applied to reach the optimum temperature measurement of a room thermostat developed for Fan Coil systems was proposed. © 2023 IEEE.

关键词： Thermostats

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An Event-Triggered Tracking control Scheme Based on Predictive control Method and its Application 42

An Event-Triggered Tracking Control Scheme Based on Predicti...

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42nd Chinese control Conference, CCC 2023

作者： Cao, Lei Yumuk, Erhan Ionescu, Clara-Mihaela Liu, Guo-Ping Harbin Institute of Technology Department of Control Science and Engineering Harbin150001 China Ghent University Dynamical Systems and Control Research Group Department of Electromechanical Systems and Metal Engineering Ghent9052 Belgium Center for Control Science and Technology Southern University of Science and Technology Shenzhen518055 China Istanbul Technical University Department of Control and Automation Engineering Istanbul34467 Turkey

ISBN: (纸本)9789887581543

In this paper, the tracking control problem for networked control system (NCS) under communication delays is investigated. In order to realize the tracking of the NCS, an event-triggered predictive control strategy is provided to compensate for the delays and achieve stability. Both tracking performance and input increments are considered in the proposed cost function. Based on the incremental inputs, an event-triggered mechanism is established to reduce the communication costs. The efforts of different parameters are illustrated through the results of the simulation, and the effectiveness of the proposed control scheme is also validated from the application of the networked lighting setup. © 2023 Technical Committee on control Theory, Chinese Association of automation.

关键词： Networked control systems

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Towards a Uniform Exchange Format for Home and Building automation using VDI 3814

Towards a Uniform Exchange Format for Home and Building Auto...

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International Conference on Emerging Technologies and Factory automation (ETFA)

作者： Felix Knorr Wolfgang Kastner Institute of Computer Engineering Research Unit of Automation Systems Vienna Austria

Exchanging technical documents in the building automation domain is a complicated process. Files are distributed either as drawings, spreadsheets, or text documents. Each stakeholder has to re-enter the data into their own system, and changes are revised manually, often even without revision control. This paper presents a uniform exchange format based on the ’graphical’ standard VDI 3814. To increase acceptance, the industry standards XSD and XML were chosen. As a result of this work, a model is provided that covers the concepts and exchange files provided in the VDI 3814 standard. Given a supporting tool, data can be entered, revised, and exchanged automatically. Based on this unified representation, it is subsequently possible to transfer the data into one of the already existing ontologies in this domain by using model transformations. Some of these ontologies are also referred to in this paper.

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Sigma-Mixed Unscented Kalman Filter-Based Fault Detection for Traction Systems in High-Speed Trains

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Chinese Journal of Electronics 2023年第5期32卷 982-991页

作者： CHENG Chao WANG Weijun MENG Xiangxi SHAO Haidong CHEN Hongtian Department of Computer Science and Technology Changchun University of Technology Department of Mathematics and Statistics Changchun University of Technology Institute of System Research China Industrial Control Systems Cyber Emergency Response Team Department of Mechanical and Vehicle Engineering Hunan University Department of Chemical and Materials Engineering University of Alberta

Fault detection(FD) for traction systems is one of the active topics in the railway and academia because it is the initial step for the running reliability and safety of high-speed trains. Heterogeneity of data and complexity of systems have brought new challenges to the traditional FD methods. For addressing these challenges, this paper designs an FD algorithm based on the improved unscented Kalman filter(UKF) with consideration of performance degradation. It is derived by incorporating a degradation process into the state-space *** network topology of traction systems is taken into consideration for improving the performance of state estimation. We first obtain the mixture distribution by the mixture of sigma points in UKF. Then, the Lévy process with jump points is introduced to construct the degradation model. Finally, the moving average interstate standard deviation(MAISD) is designed for detecting *** the proposed methods via a traction systems in a certain type of trains obtains satisfactory results.

关键词： Degradation Network topology Fault detection Rail transportation State-space methods Safety Kalman filters

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TBANet: Three Branches with Asymmetric Convolutions and Pooling for Real-time Semantic Segmentation

TBANet: Three Branches with Asymmetric Convolutions and Pool...

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2022 International Conference on Intelligent Manufacturing and Industrial Big Data, ICIMIBD 2022

作者： Qin, Hao Chen, Zhenxue Lu, Mengxu Cao, Jiaqian Zhao, Hongjian Shandong University School of Control Science and Engineering Jinan China Machinery Industry CO Beijing Research Institute of Automation Beijing China

ISBN: (纸本)9798350320305

Computational pressure limits the application of semantic segmentation in road scenes. We propose the lightweight network TBANet that makes a trade-off between accuracy and speed to deal with this problem. TBANet takes advantage of three branches (a fine-grained branch, an adaptive branch, and a coarse-grained branch) to obtain detailed and abstract information and adaptively supplement useful features for semantic segmentation. In order to exploit the information in the horizontal and vertical directions in images and remove redundant information to speed up, we propose the Asymmetric Pyramid Pooling Module (APPM) and the Asymmetric Factorized Module (AFM). TBANet with only 1M parameters processes 512×1024 images at 143 FPS and achieves 71.6% mIoU on the Cityscapes test set. TBANet stands out from other state-of-the-art networks in terms of accuracy and speed. © 2022 IEEE.

关键词： Semantic Segmentation

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Prediction of Remaining Useful Life Based on SSA-RVM-PF Method for Lithium-ion Battery 5

Prediction of Remaining Useful Life Based on SSA-RVM-PF Meth...

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5th International Symposium on Autonomous Systems, ISAS 2022

作者： Zhou, Meng Wang, Jing Cai, Chang Wang, Chang North China University of Technology School of Electrical and Control Engineering Beijing China Beijing Aerospace Automation Research Institute Beijing China

ISBN: (纸本)9781665487085

To improve the prediction accuracy of the remaining useful life of lithium-ion battery, a novel SSA-RVM-PF prediction method is proposed. The key prediction mechanism of the proposed method is based on the relevance vector machine (RVM) method. Based on the strong regression ability of RVM, the optimal degradation trajectory of battery capacity can be predicted. Meanwhile, a sparrow search algorithm (SSA) is used to optimize the kernel function parameters of RVM method. Furthermore, a particle filtering (PF) strategy is constructed based on the degradation trajectory, in which the state space model. Simulation results show that the proposed prediction method has the characteristics of high fitting degree of state tracking and high prediction accuracy. © 2022 IEEE.

关键词： Lithium-ion batteries

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USV Formation Path Planning Based on Behavior Trees and Fast Marching Method 5

USV Formation Path Planning Based on Behavior Trees and Fast...

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5th International Conference on Intelligent control, Measurement and Signal Processing, ICMSP 2023

作者： Cao, Honghao Song, Rui Xu, Junjie Hu, Xinming Bao, Zhuoye Bao, Lingzhi School of Mechatronics and Automation Shanghai University Shanghai China Artificial Intelligence Research Institute Shanghai University Shanghai China School of Computer Engineering and Science Shanghai University Shanghai China

ISBN: (纸本)9798350336030

In the deployment of multiple Unmanned Surface Vehicles (USVs) for collaborative operation, path planning is a crucial component. This paper addresses the path planning problem for USV formations operating in complex marine environments and proposes a multi-USV formation path planning method based on behavior tree formation control strategy and the Fast Marching Method (FMM). By adopting an adaptive formation library based on the FMM velocity potential field and a behavior tree formation obstacle avoidance control strategy, the path planning problem for USV formations in narrow and complex water areas is solved. Experimental validation demonstrates that the proposed method exhibits superior performance in complex marine environments, particularly in narrow obstacle zones. © 2023 IEEE.

关键词： Motion planning

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