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17th International Conference on engineering of Modern Electric Systems, EMES 2023

作者： Codoban, Adrian Coroiu, Laura Gergely, Eugen Sarosi, Jozsef University of Oradea Department Control Systems Engineering and Management Oradea Romania University of Szeged Department of Mechatronics and Automation Szeged Hungary

ISBN: (纸本)9798350310634

The shape of the wavefront is important for the most realistic reproduction of the acoustic wave. In acoustics, the wave front (or wave surface) is defined as the totality of points in the space of the propagating medium that have the same instantaneous elongation amplitude. In the ideal case, in a homogeneous and isotropic propagation medium without other disturbances, the wave has a spherical symmetry, i.e. the shape of the wavefront is circular and at large distances from the wave source, due to dispersion, the shape of the wavefront can be considered plan. In practice, however, due to the multiple component harmonics, reflections and possible summations of the primary acoustic wave, the elongation has a non-sinusoidal shape, and the wavefront may have an irregular random shape. Moreover, if the source of the wave or bodies from which it is reflected are in motion, the shape of the wavefront may even be variable in time. The paper presents a method for determining the shape of the wave front of a non-sinusoidal periodic plane acoustic wave, resulting from the addition of several harmonic components, reflected waves, etc. It uses an array of omnidirectional capacitive microphones arranged in line, at equal distances between them. At each of the microphones, the acoustic wave is captured out of phase depending on the position of the microphone in space and the shape of the wave front. These phase shifts placed next to each other give an image of the shape of the wavefront captured by the microphone system. The method presented in this paper reproduces sounds very realistically and can be used in Active Noise Cancel systems, in open spaces, with one or more mobile noise sources. One of the benefits is the increase in hearing comfort in noisy environments. Another is to record sounds with high fidelity. © 2023 IEEE.

关键词： Wavefronts

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PID2018 Benchmark Challenge: Model-based Feedforward Compensator with A Conditional Integrator

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IFAC-PapersOnLine 2018年第4期51卷 888-893页

作者： Yuan, Jie Ates, Abdullah Dehghan, Sina Zhao, Yang Fei, Shumin Chen, YangQuan School of Automation Southeast University Nanjing210096 China Engineering Faculty Computer Engineering Department Inonu University Malatya44280 Turkey Mechatronics Embedded Systems and Automation Lab University of California MercedCA95340 United States School of Science and Engineering Shandong University Jinan250061 China Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University Nanjing210096 China

Since proportional-integral-derivative (PID) controllers absolutely dominate the control engineering, numbers of different control structures and theories have been developed to enhance the efficiency of PID controllers. Thus, it is essential and inspiring to operate different PID control strategies to the PID2018 Benchmark Challenge. In this paper, a novel control strategy is designed for this refrigeration system, where a feedforward compensator and a conditional integrator are utilized to compensate the disturbances and remove the steady-state error in the benchmark problem, respectively. The simulation results given in the benchmark problem show the straightforward effectiveness of the proposed control structure compared with the existing control methods. © 2018

关键词： controllers Benchmarking Disturbance rejection Electric control equipment Proportional control systems Refrigeration Three term control systems Two term control systems Conditional integrators Feed forward compensation Model based method PID controllers Refrigeration system

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Development of embroidery machine vector control speed regulation system based on DSP

Development of embroidery machine vector control speed regul...

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International Conference on Power Electronics Systems and Applications

作者： Li, Yong-Yang Cao, Guang-Zhong Qiu, Hong Pan, J.F. Yang, Chong-Chong Institute of Automation Shenzhen University Shenzhen 518060 China College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China

ISBN: (纸本)9781457702051

Based on the rotor field oriented control principle and space vector PWM technology, a vector control speed regulation algorithm applied to embroidery machines is developed based on DSP. Combined with the theoretical analysis, a kind of Anti-Windup PI controller is adopted based on output feedback calculations, and a discrete simulation model of the vector control speed regulation system is built on Matlab/Simulink platform. After the completion of the system hardware design, the entire control system software design and programming are completed based on the TMS320F2801 fixed-point DSP. Results of simulation and experiments show that the designed system meets the needs of a practical application in spindle actuator of the embroidery machine. © 2011 IEEE.

关键词： Simulink

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Investigation of a rotary-linear switched reluctance motor

Investigation of a rotary-linear switched reluctance motor

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19th International Conference on Electrical Machines, ICEM 2010

作者： Pan, J.F. Cheung, N.C. Cao, Guang-Zhong Department of Automation College of Mechatronics and Control Engineering Shenzhen University Shenzhen China Department of Electrical Engineering Hong Kong Polytechnic University Hong Kong Hong Kong

ISBN: (纸本)9781424441754

A novel direct-drive rotary-linear switched reluctance motor (RLSRM) is proposed. The motor has the advantages of robust mechanical structure, low manufacture cost and capability of operation under hostile environments. Simulation tools such as finite element analysis (FEA) are applied for the verification of motor performance and corresponding experiments are carried out to testify the simulation results. The authors expect that the innovative actuator design can be applied in industrial applications that require both rotary and linear motions. ©2010 IEEE.

关键词： Finite element method

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Real-time on-line parameter estimation of linear switched reluctance motor

Real-time on-line parameter estimation of linear switched re...

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作者： Cheung, N.C. Pan, J.F. Li, Jin-Quan Department of Automation College of Mechatronics and Control Engineering Shenzhen University Shenzhen China Department of Electrical Engineering Hong Kong Polytechnic University Hong Kong Hong Kong

ISBN: (纸本)9781424441754

The on-line least-square identification method is applied for the linear switched reluctance motor (LSRM) based closed-loop control system. Since switched reluctance motors have severe nonlinear characteristics, on-line system identification for model parameters is the basis for precise modeling and effective control algorithms. By on-line parameter identification of LSRM with least-square scheme, the parameter characteristics can be predicted despite of operation variations. The experimental results demonstrate the identification scheme has fast response and converging speed and the capability of effective parameter prediction under different conditions. ©2010 IEEE.

关键词： Closed loop control systems

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A Novel QT-Interval Analysis Method Based on Continuous Wavelet Transform and Philips Algorithm

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Journal of engineering and Science in Medical Diagnostics and Therapy 2022年第1期5卷 011007页

作者： Işcan, Mehmet Yilmaz, Abdurrahman Vural, Berkem Yilmaz, Cüneyt Tuzcu, Volkan Mechatronics Engineering Yildiz Technical University Istanbul34349 Turkey Control and Automation Engineering Istanbul Technical University Istanbul34467 Turkey Biomedical Engineering Polytechnic University of Milan Milan20133 Italy Pediatric Cardiology Istanbul Medipol University Istanbul34810 Turkey

QT surveillance is the most vital appliance to detect the possibility of sudden death sourced by using pro-arrhythmic drugs treating abnormal conditions in the heart. The repolarization of ventricles makes QT interval surveillance difficult since noisy conditions and individual cardiac situations. Besides, an automated QT algorithm is crucial due to a manual QT measurement with some disadvantages such as fatigue condition in reading long records. In this study, a fully novel automated method combining Continuous Wavelet Transform and Philips method was established to perform QT interval analysis. Electrocardiogram recordings were obtained from PhyisoNet database marked by manual and standard automated methods. The proposed algorithm had scores of 15.46 and 11.87 millisecond mean error with 11.85 and 9.91 millisecond standard deviation in terms of gold and silver standards, respectively. Also, the entire QT database was utilized in order to test the algorithm performance with the score of 12.89 and 9.76 millisecond mean and standard deviation errors, respectively. The present algorithm performance had scores of -0.21 6 7.81 at golden standard, and -4.10 6 18.21 millisecond error for the whole QT database tests, respectively. The proposed algorithm is attained to more stable and robust results with a higher performance than the previous comparable studies. © 2022 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Database systems

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Analysis and Simulation Verification of Mechanical Properties for Planetary Roller Screw Mechanism 17

Analysis and Simulation Verification of Mechanical Propertie...

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17th IEEE International Conference on mechatronics and automation, ICMA 2020

作者： Duan, Xiaoshuai Zhang, Xinhua Huo, Xijian Guan, Ping Hao, Minghui Beijing Institute of Automation and Control Equipment Beijing China Harbin Institute of Technology School of Mechatronics Engineering Heilongjiang Province Harbin China

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164151

Load capacity is an important index to evaluate the mechanical performance of the planetary roller screw mechanism (PRSM). Improving load distribution is the key to improving load capacity. This paper analyzes and simulates the mechanical properties of PRSM. Firstly, the force on the thread contact point is performed, and the load distribution of each thread is obtained by establishing the load calculation model based on the deformation coordination relationship. Then, the PRSM Hertzian stress model is established, and the Hertzian stress variations of the contact points are calculated. On this basis, the influence of the roller pitch and thread length on the load capacity is compared and analyzed, and the roller thread is further modified. The results of calculation and simulation show that the roller modification can effectively reduce the maximum contact stress. © 2020 IEEE.

关键词： Screws

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Simulation and Experimental Research on the Thread Turning of Planetary Roller Screw Mechanism 17

Simulation and Experimental Research on the Thread Turning o...

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17th IEEE International Conference on mechatronics and automation, ICMA 2020

作者： Duan, Xiaoshuai Zhang, Xinhua Huo, Xijian Li, Xiaobin Hao, Minghui Beijing Institute of Automation and Control Equipment Beijing China Harbin Institute of Technology School of Mechatronics Engineering Harbin Heilongjiang Province China

ISBN: (纸本)9781728164151

Aiming at the problem of the thread processing process of the planetary roller screw mechanism (PRSM), the theory, simulations and experiments of the thread turning are studied in this paper. Firstly, the unit cutter model and the main cutting force model of thread turning of PRSM are established based on the minimum energy method. And the finite element simulations calculation of thread turning of PRSM are performed, which analyze the influence of cutting parameters (cut depth, speed of cutting and the lathe) on the cutting force, the cutting temperature and the tool wear. Finally, the turning experiments of the screw rod are performed. The results show that the finite element simulations can effectively ensure thread processing process PRSM. © 2020 IEEE.

关键词： Screws

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Advances in 3D printing of magnetic materials:Fabrication,properties,and their applications

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Journal of Advanced Ceramics 2022年第5期11卷 665-701页

作者： Xiangxia WEI Ming-Liang JIN Haiqiang YANG Xiao-Xiong WANG Yun-Ze LONG Zhangwei CHEN Institute for Future School of AutomationShandong Key Laboratory of Industrial Control TechnologyQingdao UniversityQingdao 266071China Collaborative Innovation Center for Nanomaterials&Devices College of PhysicsQingdao UniversityQingdao 266071China Additive Manufacturing Institute College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China

Magnetic materials are of increasing importance for many essential applications due to their unique magnetic ***,due to the limited fabrication ability,magnetic materials are restricted by simple geometric ***-dimensional(3D)printing is a highly versatile technique that can be utilized for constructing magnetic *** shape flexibility of magnets unleashes opportunities for magnetic composites with reducing post-manufacturing costs,motivating the review on 3D printing of magnetic *** paper focuses on recent achievements of magnetic materials using 3D printing technologies,followed by the characterization of their magnetic properties,which are further enhanced by ***,the corresponding properties depend on the intrinsic nature of starting materials,3D printing processing parameters,and the optimized structural *** emphasis is placed on the functional applications of 3D-printed magnetic materials in different ***,the current challenges and future opportunities are also addressed.

关键词： three-dimensional(3D)printing hard magnets soft magnets magnetic properties applications

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Robust control Performance in Uncertain Environments: A Semi-Heuristic Gradient Descent Approach 8

Robust Control Performance in Uncertain Environments: A Semi...

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8th International Conference on Instrumentation, control, and automation, ICA 2023

作者： Ahmed Hassan, Mohammed Elbadri Irham Jambak, Ahmad Bayezit, Ismail Soylemez, Mehmet Turan Istanbul Technical University Department of Control and Automation Engineering Istanbul Turkey Istanbul Technical University Department of Mechatronics Engineering Istanbul Turkey Istanbul Technical University Department of Aeronautical Engineering Istanbul Turkey

ISBN: (纸本)9798350301274

Designing a robust controller for systems with parameter uncertainties is a complex and demanding task. Traditional deterministic and probabilistic approaches may fall short in providing efficient and satisfactory solutions. To address this challenge, we propose a semi-heuristic approach that exploits the Kharitonov theorem to establish an initial point for the gradient descent algorithm. Through an iterative optimization process that incorporates user-defined performance criteria, our approach provide a robust controller with respect to presence of system uncertainties. Numerical simulations validate the effectiveness of our proposed method and highlight its superiority in addressing robust control problems compared with auto-tuned ΡΠ) controller. © 2023 IEEE.

关键词： Optimization

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