Journal articles: 'Electromechanical Engineering'

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Модло, Євгеній, Сергій Семеріков, and Катерина Шмельцер. "Modernization of Professional Training of Electromechanics Bachelors: ICT-based Competence Approach." Педагогіка вищої та середньої школи 51 (December 13, 2018): 192–223. http://dx.doi.org/10.31812/pedag.v51i0.3668.

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Modlo Yе.O., Semerikov S.O. and Shmelttser K.O. Modernization of Professional Training of Electromechanics Bachelors: ICT-based Competence Approach. Analysis of the standards for the preparation of electromechanics in Ukraine showed that the electromechanic engineer is able to solve complex specialized problems and practical problems in a certain area of professional activity or in the process of study. These problems are characterized by complexity and uncertainty of conditions. The main competencies include social-personal, general-scientific, instrumental, general-professional and specialized-professional. A review of scientific publications devoted to the training of electromechanics has shown that four branches of engineering are involved in the training of electromechanical engineers: mechanical and electrical engineering (with a common core of electromechanics), electronic engineering and automation. The common use of the theory, methods and means of these industries leads to the emergence of a combined field of engineering — mechatronics. Summarizing the experience of electrical engineers professional training in Ukraine and abroad makes it possible todetermine the main directions of their professional training modernization.

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Huang, Zichuan. "Application of Electromechanical Installation Construction Technology in Practical Engineering." Frontiers of Mechatronical Engineering 2, no. 2 (July 22, 2020): 58. http://dx.doi.org/10.18282/fme.v2i2.1079.

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Nowadays, with the continuous development of economy and society, the frequency of electromechanical installation projects in various industries is getting higher and higher. With the continuous improvement of mechanization level, the requirements for business personnel engaged in mechanical and electrical installation engineering are getting higher and higher. Electromechanical installation is a very important part in construction engineering. Only through continuous innovation, technical renewal and transformation, can the engineering function be effectively guaranteed and the economic benefit be increased. As urban construction enters the fast lane, people's requirements for the quality of life are gradually improved. The installation of construction electromechanical projects is the most prominent link in construction engineering, so construction units should pay attention to the installation of engineering electromechanical projects. The emphasis of engineering electromechanical installation is the control of installation quality and the innovation of installation technology. Based on the author's practical experience, this article first emphasizes the necessity of electromechanical installation, and then explains the relationship between construction engineering and electromechanical installation in combination with engineering practice, aiming at emphasizing the irreplaceable role of electromechanical installation in construction engineering.

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Monteiro, Fátima, R. M. Monteiro ,. Pereira, and Adelino J. C. Pereira. "Comparison Between Electromechanical Engineering and Electrical Engineering Students in the Motivation to Choose the Higher Education Study Field." WSEAS TRANSACTIONS ON ADVANCES in ENGINEERING EDUCATION 19 (June 7, 2022): 133–40. http://dx.doi.org/10.37394/232010.2022.19.14.

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The motivations with which students choose the higher programme to follow have a high impact on their academic performance throughout the programme and on the dropout rate. The type of motivation (intrinsic or extrinsic) that leads them to choose the programme area is very important in their resilience in the face of difficulties they may encounter during the programme. It is also important to attract students to a particular area of higher education. In Portugal (in line with other countries), the demand for higher education programmes in the field of Electrical Engineering has been decreasing among students applying for higher education. This decrease occurs despite the area have high employability. On the contrary, the demand for Mechanical Engineering and Electromechanical Engineering programmes has been growing. Given this, it is important to try to understand the motivations that lead students to apply for programmes in the field of Electrical Engineering. For a better understanding of the reasons that differentiate the demand for programmes in the electrical area and the mechanical area, it was considered important to study whether there are relevant differences between the motivation profile for choosing the programmes between Electrical Engineering and Electromechanical Engineering Thus, this study aimed to understand and analyse the motivations that led students from a Portuguese Polytechnic higher education institution to choose the field of Electrical Engineering or of Electromechanical Engineering. To this end, a questionnaire survey was used to collect the students’ perceptions about why they chose the programme. The results show that students highly value the fact that it is a broadband area, with high employability and a wide variety of potential professional activities. The comparison between the programmes shows that the area of mechanics is a factor that motivates students to apply for the Electromechanical Engineering. The results obtained help to understand the motivation profile of students who choose the field of Electrical Engineering and of Electromechanical Engineering, potentially contributing for the higher education institutions to promote actions with a view to enhancing the attractiveness of Electrical Engineering area.

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Chen, Dian Sheng, Tian Miao Wang, and Wan Jun Zheng. "Teaching Assistants Role in the Project-Based Learning Model for Electromechanical Control Engineering." Applied Mechanics and Materials 163 (April 2012): 186–90. http://dx.doi.org/10.4028/www.scientific.net/amm.163.186.

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For project-based learning model in course of electromechanical Control Engineering, the method of using graduate students as teaching assistants is proposed to resolve the problem of shortage of teachers. In mechanical engineering institution, graduate students undertake all kinds of teaching works after strict selection and comprehensive training and the advantages of graduate assistants are fully taken. This system makes great contributions to the teaching of the Electromechanical Control Engineering and achieves positive evaluations from teachers and students. For the problems in teaching system, corresponding solutions are proposed and good teaching effects are achieved in actual teaching process.

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Zhang, Xiaoyuan, Yane Ma, and Huixiang Cheng. "Research on Teaching English Civics in Electrical and Mechanical Engineering Based on Industrial College." Journal of Education and Educational Research 1, no. 3 (January 6, 2023): 6–9. http://dx.doi.org/10.54097/jeer.v1i3.3729.

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Professional English is an important professional course, which should guide students to establish the correct outlook on life and values in terms of value leadership. The professional English of electromechanics, mainly mechanical and electromechanical professional vocabulary, takes into account the electronics, automation, intelligent manufacturing and other specialties. In this paper, we naturally combine the content of Civics with the course of Professional English, integrate moral education into the teaching of Professional English, and adopt a project-driven training mode on the platform of Industrial College to educate students to establish correct values. It is of great significance to improve the professional quality and craftsmanship of engineering students, and also provides a basis for the construction of curriculum Civics in colleges and universities.

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Wang, An. "Application Analysis of Electrical Automation in Electromechanical Engineering." Frontiers of Mechatronical Engineering 2, no. 2 (July 20, 2020): 53. http://dx.doi.org/10.18282/fme.v2i2.1078.

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With the progress of society and the development of science and technology, China's electrical automation technology has continuously overcome difficulties and made great progress. Electrical automation plays an important role in electromechanical engineering and is widely used. At present, remote control and management of the system are especially needed, which can be achieved by electrical automation. At the same time, electrical automation can also improve the working efficiency of equipment and effectively guarantee the safety of the project. This paper analyzes the application and development of electrical automation.

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Wang, Kaiying, Guangmin Ouyang, Xuyuan Chen, and Henrik Jakobsen. "Engineering Electroactive Dielectric Elastomers for Miniature Electromechanical Transducers." Polymer Reviews 57, no. 3 (December 12, 2016): 369–96. http://dx.doi.org/10.1080/15583724.2016.1268156.

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Суслов, Анатолий, Anatoliy Suslov, Олег Федонин, Oleg Fedonin, Олег Горленко, Oleg Gorlenko, Михаил Шалыгин, Mikhail Shalygin, Леонид Захаров, and Leonid Zakharov. "Innovation technologies in mechanical engineering ensuring life increase of railway wheels and rails." Science intensive technologies in mechanical engineering 2019, no. 7 (July 1, 2019): 3–8. http://dx.doi.org/10.30987/article_5cf7bd2f83f6b5.55900953.

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In the paper it is shown that railway wheels and rails life depends considerably upon wear-resistance of their tread working surfaces. There is presented an innovation technology of a railway wheel tread electromechanical processing allowing the increase of its life. The innovation technology of railway wheel working tread electromechanical processing allowing its life increase is shown. The innovation technology for rail working tread allowing its life increase is given.

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Lu, Tongqing, Sibo Cheng, Tiefeng Li, Tiejun Wang, and Zhigang Suo. "Electromechanical Catastrophe." International Journal of Applied Mechanics 08, no. 07 (October 2016): 1640005. http://dx.doi.org/10.1142/s1758825116400056.

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A transducer is a system that couples two loads. For example, an electromechanical transducer couples a mechanical force and an electrical voltage. A two-load, nonlinear system can exhibit rich behavior of bifurcation, which can be displayed in a three-dimensional space, with the horizontal plane representing the two loads, and the vertical axis representing the state of the system. In this three-dimensional space, a state of equilibrium at fixed loads corresponds to a point on a surface. The surface is smooth, but its projection to the load plane results in singularities of two types: fold and cusp. Here we identify the fold and cusp for a dielectric elastomer transducer by a combination of experiment and calculation. We conduct two kinds of experiment: electrical actuation under a constant force and mechanical pulling under a constant voltage. The theory and the experiment agree well. The fold and cusp are essential in the design of loading paths to avoid or harness the bifurcation.

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Tang, Fan, Guo Liang Su, Dong Xiang Li, and Yu Hong Wang. "Electromagnetic - Electromechanical Transient Hybrid Simulation of Deyang-Baoji HVDC System Based on ADPSS." Advanced Materials Research 805-806 (September 2013): 935–40. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.935.

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three kinds of digital programs used in power system simulation are summarized in this paper. The electromagnetic and electromechanical transient simulation software ADPSS is introduced. Electromagnetic transient simulation, electromechanical transient simulation and electromagnetic-electromechanical transient hybrid simulation are performed respectively on Deyang-Baoji ±500KV HVDC system. The simulation result shows that the electromagnetic-electromechanical transient hybrid simulation has the advantage of electromagnetic transient simulation and electromechanical transient simulation. It can effectively analyze the process of the local electromagnetic transient in large-scale grid. The simulation speed is fast and the result is accurate and reliable.

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Huang, Dengpeng, and Sigrid Leyendecker. "An electromechanically coupled beam model for dielectric elastomer actuators." Computational Mechanics 69, no. 3 (November 25, 2021): 805–24. http://dx.doi.org/10.1007/s00466-021-02115-0.

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AbstractIn this work, the Cosserat formulation of geometrically exact beam dynamics is extended by adding the electric potential as an additional degree of freedom to account for the electromechanical coupling in the dielectric elastomer actuators. To be able to generate complex beam deformations via dielectric actuator, a linear distribution of electric potential on the beam cross section is proposed. Based on this electric potential, the electric field and the strain-like electrical variable are defined for the beam, where the strain-like electrical variable is work-conjugated to the electric displacement. The electromechanically coupled strain energy for the beam is derived consistently from continuum electromechanics, which leads to the direct application of the material models in the continuum to the beam model. The electromechanically coupled problem in beam dynamics is first spatially semidiscretized by 1D finite elements and then solved via variational time integration. By applying different electrical boundary conditions, different deformations of the beam are obtained in the numerical examples, including contraction, shear, bending and torsion. The damping effect induced by the viscosity as well as the total energy of the beam are evaluated. The deformations of the electromechanically coupled beam model are compared with the results of the 3D finite element model, where a good agreement of the deformations in the beam model and that in the 3D finite element model is observed. However, less degrees of freedom are required to resolve the complex deformations in the beam model.

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Wang, Ke, Frank Gao, Jia Peng, and Jie Wang. "Research of Conceptual Design of Electromechanical Products Based on KBE." Advanced Materials Research 421 (December 2011): 693–98. http://dx.doi.org/10.4028/www.scientific.net/amr.421.693.

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This document proposes a method of conceptual design of electromechanical products based on KBE(knowledge-based engineering), in order to improve the efficiency of the conceptual design about electromechanical products and avoid the repetitive work of the traditional design, then establishes a system model for that. it completes the conceptual design of products through data mining, rule-based reasoning and other key technologies. A case of reducer design shows that the method is feasible and practical for the conceptual design of electromechanical products.

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Gozum, Mehmet Murat, Amirreza Aghakhani, and Ipek Basdogan. "An investigation of the electromechanical coupling and broadband shunt damping in composite plates with integrated piezo-patches." Journal of Intelligent Material Systems and Structures 30, no. 20 (September 15, 2019): 3008–24. http://dx.doi.org/10.1177/1045389x19873045.

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The popularity of laminated composite plate-like structures is increasing in various engineering applications. Piezoelectric patches with electrical circuit elements can be integrated into these structures for shunt damping applications. For analyzing the shunt damping performance of these systems, precise modeling tools are required, which consider the two-way electromechanical coupling between the piezo-patches and the host plate. This study aims to identify the system parameters which affect the electromechanical coupling coefficient, a metric for measuring the effectiveness of mechanical-to-electrical energy conversion. For that purpose, a thorough investigation is performed to determine the critical system parameters and their combined effects on the electromechanical coupling coefficient of laminated composite plates with surface-bonded piezo-patches. First, the first four natural frequencies of the electromechanical system are obtained using the Rayleigh–Ritz method for various patch sizes. Then, the electromechanical coupling coefficient variations for a different set of system parameters are presented. Later, to demonstrate the applicability of the developed methodology for a broader frequency range, four independently shunted piezo-pairs are attached to the plate. The contours of electromechanical coupling coefficient values with respect to ply angle and patch-pair size are presented for the first four modes. Finally, the vibration amplitudes are successfully reduced for these modes using the optimal system parameters.

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Yu, Na. "Brief Discussion of Highway Tunnel Electromechanical System." Applied Mechanics and Materials 543-547 (March 2014): 3998–4001. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.3998.

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Highway tunnel mechanical and electrical engineering is a complex system which involves machinery, electronics, automation, communication and etc. In order to achieve high quality mechanical and electrical engineering standards, the construction and detection process should be planed and managed in details.

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Bassiouny, E., and G. A. Maugin. "Thermodynamical formulation for coupled electromechanical hysteresis effects—IV. Combined electromechanical loading." International Journal of Engineering Science 27, no. 8 (January 1989): 989–1000. http://dx.doi.org/10.1016/0020-7225(89)90039-6.

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Petukhov, A. M., V. M. Kuz’min, R. V. Kuz’min, and I. N. Dubrovskii. "Combined electromechanical generator." Russian Electrical Engineering 84, no. 5 (May 2013): 279–84. http://dx.doi.org/10.3103/s1068371213050076.

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Shaitor, N. M., B. A. Yakimovich, Y. I. Ryaskov, and A. V. Gorpinchenko. "Application of Genetic Engineering Techniques in the Development of Complex Electromechanical Structures for Marine Robotics." Nelineinaya Dinamika 16, no. 1 (2020): 93–103. http://dx.doi.org/10.20537/nd200108.

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Barash, Moshe M. "Electromechanical design handbook." Journal of Manufacturing Systems 14, no. 2 (January 1995): 134–37. http://dx.doi.org/10.1016/0278-6125(95)90008-x.

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Gapparov, A. U., G. A. Govor, U. T. Berdiyev, F. F. Hasanov, and A. M. Kurbanov. "Magnetic-soft materials based on iron for electromechanical engineering." IOP Conference Series: Earth and Environmental Science 614 (December 18, 2020): 012048. http://dx.doi.org/10.1088/1755-1315/614/1/012048.

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Wang, Jing. "Green Supply Chain for Electromechanical Engineering of Rail Transit." IOP Conference Series: Earth and Environmental Science 576 (November 12, 2020): 012030. http://dx.doi.org/10.1088/1755-1315/576/1/012030.

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Todos, Petru, Ilie Nuca, Andrei Chiciuc, Vadim Cazac, and Marcel Burduniuc. "Electromechanical engineering education and science in Republic of Moldova." Studia Universitatis Babeș-Bolyai Engineering 67, no. 1 (November 11, 2022): 256–67. http://dx.doi.org/10.24193/subbeng.2022.1.25.

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The work is a summary of the history of the industry and education development of electrotechnics in the Republic of Moldova during the independence period. With the national renaissance, the process of professional training in the electrotechnical field began to take on a natural national face - training in the Romanian language. Scientific research is determined by the subject of special submersible and permanent magnet electric machines, renewable energy sources, but also by new directions such as the development of adjustable electromechanical systems for the automation and efficiency of technological processes and traction systems of electric passenger vehicles.

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Zhang, Kai, Wu Zhao, and Chun Sheng Zhou. "Knowledge Support Technology of Creative Design for Electromechanical Products." Advanced Materials Research 139-141 (October 2010): 1148–53. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1148.

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It has been discussed in this paper that the necessity of knowledge support technology used in creative design of electromechanical products. In order to apply knowledge support technology to creative design of electromechanical products, a relation matrix has been constructed by QFD (Quality Function Deployment) technology between the various performances of electromechanical products and the involved knowledge of them. Thus, the HOQ (House of Quality) about the knowledge–performance of electromechanical products is built. Then, the further demand tracking has been made as well. After that, it has been established that the knowledge model and knowledge application process used in creative design of electromechanical products. Finally, a new method has been proposed which can guide designers to do product creative design by knowledge demand.

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Ozulu, A., and B. Lyubarsky. "Calculation of the parameters of the electromechanical shock absorber of the high-speed electric train." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", no. 41 (June 28, 2023): 24–34. http://dx.doi.org/10.32703/2617-9059-2023-41-2.

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The article examines the issue of the chassis system of a high-speed electric train with body inclination and a vibration recovery system. The advantages of using an electromechanical shock absorber over hydraulic, pneumatic and similar systems are described. The authors considered the main characteristics of the DC electromechanical shock absorber. The main overall parameters of the shock absorber were presented. Attention is paid to the relevance of using an electromechanical shock absorber of a linear type, in comparison with analogues, including the ability to recover energy. Attention is drawn to the structure of the DC electromechanical shock absorber. The functional control scheme of the electromechanical shock absorber is considered and the control algorithm is described. The calculation areas of the parameters of the electromechanical shock absorber are determined. A 3D model of an electromechanical shock absorber in the Ansys Electronics software environment is presented. A finite-element mesh was built for further calculations of the magnetic field and inductance. In the article, attention is paid to the calculation of the magnetic field in the most intense mode. A picture of the shock absorber's magnetic field at the maximum working clearance was obtained and interim results were discussed. The results of calculating the inductance depending on the operating gap of the shock absorber are presented. Conclusions were made based on the results of calculations of magnetic and electrical parameters of an electromechanical shock absorber based on a linear direct current motor.

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Zhang, Wending. "Research on Construction Technology and Quality Control of Electromechanical Installation Engineering for Buildings." Frontiers of Mechatronical Engineering 2, no. 3 (October 19, 2020): 84. http://dx.doi.org/10.18282/fme.v2i3.1362.

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Mechanical and electrical installation is a very important construction technology in construction engineering. From the perspective of the construction unit, whether the installation technology and procedure are scientific and reasonable will have a direct impact on the final quality of the project, and it is also closely related to the personal and property safety of the residents. Based on this, construction organizers should construct and perfect a standardized installation construction quality management system, clarify management regulations, and control key technical points, so as to comprehensively improve the quality of electromechanical installation projects and improve the project qualification rate. This article will describe the construction technology and quality control strategy of electromechanical installation engineering, aiming to lay a theoretical foundation for the improvement of engineering qualification rate and construction quality.

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Ozulu, A., and B. Lyubarsky. "PROSPECTIVE ELECTROMECHANICAL SHOCK ABSORBERS." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" 1, no. 38 (December 24, 2021): 133–40. http://dx.doi.org/10.32703/2617-9040-2021-38-130-12.

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The article considers the issue of the system of the running gear of a high-speed electric train with a body inclination and the system of oscillation recovery. The authors considered the main suspension systems of the electric train body, which are currently used. The main problems of these suspension systems were put forward. Attention is paid to the use of air-spring suspension. The pipe suspension of the VL80 electric locomotive and the construction of the trolley itself are considered. The basic criteria of an estimation of efficiency of perspective electromechanical shock-absorbers on which the comparative characteristic is carried out are defined. The article describes a promising electromechanical shock absorber based on a synchronous linear motor, which can provide both body tilt and damping and recovery of oscillations. The functional scheme of control of two synchronous linear motors which are established on one cart is considered. The operation of the control system of synchronous linear motors is described. The design of a linear DC motor with permanent magnets is described. The functional control scheme of two linear DC motors with permanent magnets is considered. The design of the electromechanical shock-absorber of the Bose company is resulted. The comparative characteristic of three perspective electromechanical shock-absorbers on six criteria is carried out. Conclusions are made and an electromechanical shock absorber is selected, which provides the basic needs of rolling stock.

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Qiao, Guan, Geng Liu, Zhenghong Shi, Yawen Wang, Shangjun Ma, and Teik C. Lim. "A review of electromechanical actuators for More/All Electric aircraft systems." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 22 (December 28, 2017): 4128–51. http://dx.doi.org/10.1177/0954406217749869.

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Conventional hydraulic actuators in aircraft systems are high maintenance and more vulnerable to high temperatures and pressures. This usually leads to high operating costs and low efficiency. With the rapid development of More/All Electric technology, power-by-wire actuators are being broadly employed to improve the maintainability, reliability, and manoeuvrability of future aircraft. This paper reviews the published application and development of the airborne linear electromechanical actuator. First, the general configuration, merits, and limitations of the gear-drive electromechanical actuator and the direct-drive electromechanical actuator are analysed. Second, the development state of the electromechanical actuator testing systems is elaborated in three aspects, namely the performance testing based on room temperature, testing in a thermal vacuum environment, and iron bird. Common problems and tendencies of the testing systems are summarized. Key technologies and research challenges are revealed in terms of fault-tolerant motor, high-thrust mechanical transmission, multidisciplinary modelling, thermal management, and thermal analysis. Finally, the trend for future electromechanical actuators in More/All Electric Aircraft applications is summarized, and future research on the airborne linear electromechanical actuators is discussed.

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Blick, Robert H., and Dominik V. Scheible. "A quantum electromechanical device: the electromechanical single-electron pillar." Superlattices and Microstructures 33, no. 5-6 (May 2003): 397–403. http://dx.doi.org/10.1016/j.spmi.2004.02.021.

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Ai, Demi, Chengxing Lin, Hui Luo, and Hongping Zhu. "Temperature effect on electromechanical admittance–based concrete structural health monitoring." Structural Health Monitoring 19, no. 3 (July 9, 2019): 661–92. http://dx.doi.org/10.1177/1475921719860397.

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Concrete structures in service are often subjected to environmental/operational temperature effects, which change their inherent properties and also inflict a challenge to their extrinsic monitoring systems. Recently, piezoelectric lead zirconate titanate (PZT)-based electromechanical admittance technique has been increasingly growing into an effective tool for concrete structural health monitoring; however, uncertainty in the changes of monitoring signals induced by temperature impact on concrete/PZT sensor would inevitably cause interference to structural damage detection, which adversely hinder its application from laboratory to engineering practice. This article, aiming at exploring the temperature effect on the electromechanical admittance–based concrete damage evaluation, primarily covered a series of theoretical/numerical analysis with rigorously experimental verifications. Three aspects of comparative studies were performed in theoretical/numerical analysis: (1) thermal-dependent parameters were inclusively evaluated in contribution to the electromechanical admittance characteristics via PZT-structure interaction models; (2) three-dimensional finite element analysis in multi-physics coupled field was employed to qualitatively assess the singular temperature effect on the electromechanical admittance behaviors of free-vibrated PZT, surface-bonded PZT/inside-embedded PZT coupled healthy concrete cubes; and (3) depending on the modeling of surface-bonded PZT-/inside-embedded PZT-cracked concrete cube, thermal effect on damage evaluation was addressed via quantification on the electromechanical admittance variations. In the experimental study, rigorous validation tests were carried out on a group of lab-scale concrete cubes, where surface-bonded PZT/inside-embedded PZT transducers were simultaneously employed for electromechanical admittance monitoring in view of thermal difference between concrete surface and its inner part. Correlation coefficient deviation value-based effective frequency shifts algorithm was also employed to compensate the temperature effect. Moreover, temperature effect was further testified on the monitoring of a full-scale shield-tunnel segment structure. Experimental results indicated that temperature triggered different behaviors of electromechanical admittance signatures for surface-bonded PZT/inside-embedded PZT transducers and contaminated the electromechanical admittance responses for damage detection. Structural damage severity level can be disadvantageously amplified by temperature increment even if under the same damage scenarios.

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Xu, L., and X. Jia. "Electromechanical-fluidic coupled dynamics for microbeams." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 222, no. 3 (March 1, 2008): 535–48. http://dx.doi.org/10.1243/09544062jmes694.

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In the current article an electromechanical-fluidic coupled dynamic model of the microbeam is presented and the electromechanical-fluidic coupled dynamic equations are obtained. Using the KBM method, the non-linear coupled dynamic equations are resolved. The explicit equations of the free vibrating displacements of the microbeam are given. Under free vibration, the equations of the electric field fluctuation and the air pressure fluctuation are also given. Besides this, the forced responses of the electromechanical-fluidic coupled system to voltage excitation are also analysed. Changes in the electromechanical-fluidic coupled vibrations along with mechanical, electric, and fluidic parameters are investigated.

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Saarimaki, E., M. Paajanen, A. Savijarvi, H. Minkkinen, M. Wegener, O. Voronina, R. Schulze, W. Wirges, and R. Gerhard-Multhaupt. "Novel heat durable electromechanical film: processing for electromechanical and electret applications." IEEE Transactions on Dielectrics and Electrical Insulation 13, no. 5 (October 2006): 963–72. http://dx.doi.org/10.1109/tdei.2006.1714918.

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Jin, Huawei, Huanyu Huo, Chuanli Wang, Shun Wang, and Huwei Xu. "Design and experimental study of electrical and mechanical brake for mine hoist." Mechanics & Industry 22 (2021): 36. http://dx.doi.org/10.1051/meca/2021033.

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To meet the requirement of the braking response of the coal mine hoist, a new electromechanical braking technology for mine hoists is proposed, the principle of electromechanical braking of mine hoists is demonstrated, and the detailed parameters and braking performance of electromechanical brakes are given. Index, an electromechanical brake test platform with large load and high response is developed. Experiments show that the maximum positive pressure of the designed electromechanical brake reaches 33 KN, which meets the requirement of positive pressure of mine hoist. The braking error is less than 10 %, and the braking gap elimination time is less than 0.1 s. There is a linear relationship between motor current input and brake positive pressure output, with a slope of 4.17 and an intercept of 0.62. The screw displacement output and the brake pressure output have a cubic relationship, and the zero error is small. Through research, a new idea is provided for the development of electromechanical brakes for coal mine hoist.

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Hao, Su Li, and Deng Lun Zhang. "The Construction Personnel Safety Risk Analysis and Risk Response of Mechanical and Electrical Installation Project." Advanced Materials Research 912-914 (April 2014): 1809–12. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.1809.

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The mechanical and electrical installation project is a major component of mechanical and electrical engineering project. With the rapid development of the construction industry, the scale of electromechanical installation project is expanding. But all kinds of installation project accidents (especially in construction stage) have attracted the attention of social. With the construction stage of electromechanical installation project as research object, the personnel risk factors are been analyzed. Furthermore the paper refines the intrinsic cause of the risk factors using the factor analysis method and SPSS. Finally the counter-measures are given.

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Liu, Shu Hong, Yan Liang Du, Yue Qin Qi, and Cong Juan Yang. "The Plane Problem Solution of Piezoelectric Material with a Line Crack." Advanced Materials Research 33-37 (March 2008): 533–38. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.533.

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A two-dimensional electromechanical analysis is performed on a transversely isotropic piezoelectric material containing a line crack of length 2a, which is subjected to uniform distributed forces with intensity q along the crack faces and uniform electric displacement fields at infinity. Based on the impermeable electric boundary conditions, the closed complex form expression for the electromechanical fields are deduced in the vicinity of the crack. Taking PZT-4 ceramic into consideration, electromechanical fields under different loads are illustrated through several examples. It can be seen that electromechanical fields show 1/2 order singularity at the crack tip, and the piezoelectric effect can’t be negelected.

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Yang, Xiao Mei. "A Hybrid-Stabilized Solid Element for Piezoelectric Laminated Plate Analysis." Advanced Materials Research 311-313 (August 2011): 248–55. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.248.

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In this paper, an eight-node solid hybrid-stabilized element for general piezoelectric laminate plate analysis is formulated based on the electromechanical Hellinger-Reissner functional. The independent field variables in the functional include the displacement, electric potential, stress and electric displacement. The non-constant electromechanical stress modes are contravariant in nature and chosen to be orthogonal with respect to the constant ones. The othogonality and the practice put forward in the admissible matrix formulation allow the electromechanical flexibility matrices to be block diagonal. As a result, the computational cost for inverting the electromechanical flexibility matrices can be greatly reduced. Numerical examples indicate that the proposed hybrid piezoelectric element is more accurate than their conventional counterpart.

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Borisov, Andrey V., and Konstantin D. Filippenkov. "Controlling a Variable-Length Exoskeleton Link." Vestnik MEI 3, no. 3 (2021): 110–20. http://dx.doi.org/10.24160/1993-6982-2021-3-110-120.

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The aim of the study is to develop a spatial electromechanical model of a variable-length link for use in telescopic manipulators, anthropomorphic robots, exoskeletons, and in studying the human musculoskeletal system. The proposed link model has two massive absolutely solid sections at the ends and a weightless section of variable length located between them. The study was carried out using the methods of theoretical mechanics, electromechanics, mathematical modeling, engineering design, numerical methods for solving systems of ordinary differential equations, control theory, nonlinear dynamics, experimental methods, and empirical data on the biomechanical properties of the human musculoskeletal system. The reliability of the obtained results is substantiated by a rigorous use of the above-mentioned methods. As a result of the study, a system of Lagrange-Maxwell differential equations was written, and an electromechanical model of an anthropomorphic system was developed in the Matlab Simulink software package. With the specified geometric and inertial parameters of a variable-length link corresponding to an average person's leg lower part and the time corresponding to the single-support motion phase, the electric motors and reducing gears implementing the human musculoskeletal system link's biomechanical motion fragment are selected. All of the selected motors have a sufficient operating parameters margin. The trajectories of all generalized coordinates along which the anthropomorphic system performs its necessary motion are determined. The mechanism load diagrams are obtained. The control system for the motors is synthesized, and the positioning error is evaluated. The novelty of the approach is that the newly developed electromechanical models of controlled variable-length links have a wide range of applying the obtained results and can be used in designing anthropomorphic robots and comfortable new-generation exoskeletons. Thus, the electromechanical model of a variable-length link with the parameters corresponding to the average person's leg lower part has been developed. The electric drives and transmissions able to implement a motion close to the anthropomorphic one have been selected; its implementation has been demonstrated, and the numerical calculation results are given.

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Fan, Shuli, Weijie Li, Qingzhao Kong, Qian Feng, and Gangbing Song. "Monitoring of pin connection loosening using eletromechanical impedance: Numerical simulation with experimental verification." Journal of Intelligent Material Systems and Structures 29, no. 9 (February 1, 2018): 1964–73. http://dx.doi.org/10.1177/1045389x18754354.

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Pin connection, as an important structural connection mechanism, is widely used in various structures, especially spatial structures. In this article, numerical and experimental investigations are performed for monitoring the loosening of pin-connected structures using the electromechanical impedance technique. For this purpose, a finite element model for a pin-connected structure considering the contact interfaces between the pin and the support base is proposed to study the effect of pin connection loosening on the electromechanical impedance signatures. A multi-physics analysis is conducted to simulate the electromechanical behavior of lead zirconate titanate transducers bonded on the pin head and the steel base. The relationship between the force applied on the pin connection and the variation in electromechanical impedance signatures is established. Experiments are carried out to verify the accuracy of the proposed finite element model. The results show that the changes in the electromechanical impedance signatures consist of frequency shifts and peak splitting. The contact condition of the pin connection can be assessed by observing the changes in the electromechanical impedance signatures. The location of the piezoelectric patch has significant effect on the sensitivity of the electromechanical impedance signatures. The numerical study in this research helps to optimize the design of sensor placement and improve the detection accuracy of the electromechanical impedance method in practical applications of detecting the loosening of pin-connected structures.

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Li, Xiujuan, Wenzhong Qu, Li Xiao, and Ye Lu. "Removal of temperature effect in impedance-based damage detection using the cointegration method." Journal of Intelligent Material Systems and Structures 30, no. 15 (July 10, 2019): 2189–97. http://dx.doi.org/10.1177/1045389x19862364.

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Electromechanical impedance technique has been widely used in the area of structural health monitoring. However, both damage and variation in environmental temperature can cause the changes in electromechanical impedance signature, which may cause false damage diagnosis. The temperature effect on the electromechanical impedance-based method has been one of its main drawbacks in practical application. This article proposes a new approach based on cointegration to eliminate temperature interference in the electromechanical impedance technique. The augmented Dickey–Fuller test is used to analyze the stationary characteristics of the time series and determine the degree of non-stationarity. The Johansen test is used to obtain the cointegrating residuals instead of the direct electromechanical impedance responses for damage detection. The proposed method is verified on the undamaged and damaged steel plates with the consideration of environmental temperature variations. The damage detection was based on the electromechanical impedance technique in which the peak frequency is chosen as a cointegrated variable. The experimental results show that the cointegration method can remove the temperature effect on the electromechanical impedance responses, and the cointegrating residuals are effective indices to indicate the occurrence of damage.

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Ivanov, S. N., K. K. Kim, and I. M. Karpova. "Heat-generating electromechanical converter." Russian Electrical Engineering 79, no. 9 (September 2008): 508–13. http://dx.doi.org/10.3103/s1068371208090071.

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He, Cheng Bing, Zhi Yong Wang, and Jian Shen. "Analysis of Subsynchronous Oscillation in a Multi Turbo-Generator Sets Power System Based on Electromechanical Wave Model." Applied Mechanics and Materials 50-51 (February 2011): 516–20. http://dx.doi.org/10.4028/www.scientific.net/amm.50-51.516.

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Electromechanical wave model is a new method in the research of generator-grid dynamic response of large scale electric power systems. Based on wave equations of elastic bearing transmit mechanical power and transmission line transmit magnetic power respectively, this paper built integrate electromechanical wave model of turbine-generator-grid with the example of No. 3 unit in Yimin Power Plant. With the help of electromechanical wave model, subsynchronous oscillation (SSO) example was given which indicated that the higher disturbance voltage, the bigger SSO amplitude; the larger damp, the smaller SSO amplitude, which will make the fluctuation become stable earlier. This conclusion has significant engineering value on reducing SSO amplitude of Yimin power plant.

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Wang, Yue, Ghulam Bary, Riaz Ahmad, Dameng Yin, Shiwei Xie, Qing Lu, Ilyas Khan, Nawa Alshammari, Nawaf N. Hamadneh, and Mulugeta Andualemb. "Numerical Study of Duffing Nonlinearity in the Quantum Dot Embedded Nanomechanical Resonator." Mathematical Problems in Engineering 2021 (November 24, 2021): 1–8. http://dx.doi.org/10.1155/2021/2717507.

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Geometry, electrostatics, and single-electron tunneling contribute to the nonlinearity in the quantum dot embedded nanomechanical resonator, while “Duffing term” is a kind of mathematics describing the third-order nonlinearity of the system as a whole. We study theoretically the influence of a variation of a mathematical parameter Fuffing term on the actual physical effect. The position probability distribution, the average current, and the displacement fluctuation spectrum with the different Duffing parameter and electromechanical coupling are obtained through numerically calculating the Fokker Planck equation. The mechanical bistability has been described by these quantities under different electromechanical coupling and Duffing parameters. We conclude that the nonlinearities of the nanotube resonator contribute to the mechanical bistability, which induces the asymmetry of the position probability distribution, compresses the current, and softens or stiffens the mechanical resonance frequency as the same as the electromechanical coupling to use it in mechanical engineering.

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Chillara, Vamshi K. "Engineering the electromechanical response of piezoelectric transducers: Some challenging applications." Journal of the Acoustical Society of America 149, no. 4 (April 2021): A126. http://dx.doi.org/10.1121/10.0004739.

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Berdiev, U., U. Sulaymonov, D. Abduvalieva, F. Khasanov, and U. Berdiyorov. "Magnetic properties of soft magnetic composites used in electromechanical engineering." E3S Web of Conferences 383 (2023): 04047. http://dx.doi.org/10.1051/e3sconf/202338304047.

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The article discusses the methods of using composite magnetic alloys for elements of electrical engineering. The main methods of obtaining soft magnetic composite materials have been studied in order to obtain high-performance MMC particles, as it should be subjected to electrically insulated powder to obtain high-density parts. High densities generally improve magnetic properties, both to keep hysteresis losses low and to obtain high flux density. These give an effect when used for the cores of electric motors based on magnetically soft composite materials.

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Abdelrahman, Alaa A., Mohamed S. Abdelwahed, Hani M. Ahmed, Amin Hamdi, and Mohamed A. Eltaher. "Investigation of Size-Dependent Vibration Behavior of Piezoelectric Composite Nanobeams Embedded in an Elastic Foundation Considering Flexoelectricity Effects." Mathematics 11, no. 5 (February 27, 2023): 1180. http://dx.doi.org/10.3390/math11051180.

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This article investigates the size dependent on piezoelectrically layered perforated nanobeams embedded in an elastic foundation considering the material Poisson’s ratio and the flexoelectricity effects. The composite beam is composed of a regularly squared cut-out elastic core with two piezoelectric face sheet layers. An analytical geometrical model is adopted to obtain the equivalent geometrical variables of the perforated core. To capture the Poisson’s ratio effect, the three-dimensional continuum mechanics adopted to express the kinematics are kinetics relations in the framework of the Euler–Bernoulli beam theory (EBBT). The nonlocal strain gradient theory is utilized to incorporate the size-dependent electromechanical effects. The Hamilton principle is applied to derive the nonclassical electromechanical dynamic equation of motion with flexoelectricity impact. A closed form solution for resonant frequencies is obtained. Numerical results explored the impacts of geometrical and material characteristics on the nonclassical electromechanical behavior of nanobeams. Obtained results revealed the significant effects of the mechanical, electrical, and elastic foundation parameters on the dynamic behavior of piezoelectric composite nanobeams. The developed procedure and the obtained results are helpful for many industrial purposes and engineering applications, such as micro/nano-electromechanical systems (MEMS) and NEMS.

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Wandowski, T., P. Malinowski, L. Skarbek, and W. Ostachowicz. "Moisture detection in carbon fiber reinforced polymer composites using electromechanical impedance technique." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 2 (February 26, 2015): 331–36. http://dx.doi.org/10.1177/0954406215574239.

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In this paper, electromechanical impedance method was utilized in order to detect moisture level changes in carbon fiber reinforced polymer composites. Due to electromechanical coupling of piezoelectric transducers, glue layer and host structure mechanical resonances are visible in the electric impedance spectrum of transducer. Appearance of additional resonance peaks, their shift in frequency or magnitude change can be treated as indicator of damage or anther anomaly present in the host structure. Research presented in this paper shows that moisture content also has influence on electromechanical resonant peaks.

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Maklakov, Vladimir. "DEVELOPING A MODEL OF ELECTROMECHANICAL CONVERTER WITH AN ALL-METAL FERROMAGNETIC ROTOR." Automation and modeling in design and management 2022, no. 3 (September 27, 2022): 94–100. http://dx.doi.org/10.30987/2658-6436-2022-3-94-100.

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The article presents the relevance of studying the characteristics of electromechanical con-verters with ferromagnetic all-metal rotors; gives a brief review of the research in this area. The aim of the work is to develop a model of an electromechanical converter with a ferromagnetic rotor. The paper substantiates the expediency of using the field approach when considering electromagnetic processes occurring in the air gap and the all-metal rotor of such converters. The accepted assumptions are described and the field problem solution is obtained, which makes it possible to determine the distribution of the vector magnetic potential in the air gap and the massive rotor of the electromechanical converter. The general principles of constructing models of electromechanical converters are considered making it possible to analyze the influence of various design parameters and material properties and to give recommendations on their selection and optimization, considering the required type of mechanical characteristic at the preliminary design stage. Testing the model is carried out on the example of calculating the mechanical characteristics of an electromechanical converter with a ferro-magnetic all-metal rotor in the electromagnetic brake mode

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Sheng, Lianchao, Wei Li, Yuqiao Wang, Mengbao Fan, and Xuefeng Yang. "Nonlinear dynamic analysis of an electromechanical coupling transmission system: A case study on shearers." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 4 (April 17, 2018): 1181–92. http://dx.doi.org/10.1177/0954406218770703.

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The operation environment of an electromechanical coupling transmission system in shearers is significantly harsher than that of electromechanical coupling transmission system for general applications. Besides, under the combined action of electrical and mechanical factors, unstable phenomenon may appear when the complicated dynamic behaviors of electromechanical coupling transmission system of a shearer occur such as bifurcation and chaos. Therefore, to solve this problem, the stability, bifurcation, and chaotic characters of electromechanical coupling transmission system with various electromagnetism stiffnesses are investigated in this paper. Then, the nonlinear dynamic equation of electromechanical coupling transmission system of a shearer is set up by taking both air-gap field energy of permanent magnet synchronous motor and coupling impact of mechanical and electrical parameters. According to the established equations, the equilibrium point and eigenvalue of the system are discussed. Meanwhile, the parameters conditions of the system Hopf bifurcation and chaotic motion are analyzed, and the homoclinic orbit of the system is determined. The results show that bifurcation and chaotic motion can be controlled effectively when reasonable parameters are concerned, which is of great practical significance to further study the vibration of the mechanical-electromagnetic coupling transmission system and the improvement of system stability.

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Zhang, Mingyue, Man Zhou, Hui Liu, Baiqiang Zhang, Yulian Zhang, and Hairong Chu. "Friction compensation and observer-based adaptive sliding mode control of electromechanical actuator." Advances in Mechanical Engineering 10, no. 12 (December 2018): 168781401881379. http://dx.doi.org/10.1177/1687814018813793.

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The performance of the electromechanical actuator system is usually affected by the nonlinear friction torque disturbance, model uncertainty, and unknown disturbances. In order to solve this problem, a model-based friction compensation method combined with an observer-based adaptive sliding mode controller for the speed loop of electromechanical actuator system is presented in this article. All the disturbances and model uncertainty of electromechanical actuator system are divided into two parts. One is model-based friction torque disturbance which can be identified by experiments, and the other is the residual disturbance which cannot be identified by experiments. A modified LuGre model is adopted to describe the friction torque disturbance of electromechanical actuator system. An extended state observer is designed to estimate the residual disturbance. An adaptive sliding mode controller is designed to control the system and compensate the friction torque disturbance and the residual disturbance. The stability of the electromechanical actuator system is discussed with Lyapunov stability theory and Barbalat’s lemma. Experiments are designed to validate the proposed method. The results demonstrate that the proposed control strategy not only provides better disturbance rejecting ability but also provides better steady state and dynamic performance.

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Lai, Xin, and Wanjun Xie. "Theoretical and Experimental Study on Electromechanical Coupling Properties of Multihammer Synchronous Vibration System." Shock and Vibration 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/6707264.

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Industrial simulation of real external load using multiple exciting points or increasing exciting force by synchronizing multiple exciting forces requires multiple vibration hammers to be coordinated and work together. Multihammer vibration system which consists of several hammers is a complex electromechanical system with complex electromechanical coupling. In this paper, electromechanical coupling properties of such a multihammer vibration system were studied in detail using theoretical derivation, numerical simulation, and experiment. A kinetic model of multihammer synchronous vibration system was established, and approximate expressions for electromechanical coupling strength were solved using a small parameter periodic averaging method. Basic coupling rules and reasons were obtained. Self-synchronization and frequency hopping phenomenon were also analyzed. Subsequently, numerical simulations were carried out and electromechanical coupling process was obtained for different parameters. Simulation results verify correctness of the proposed model and results. Finally, experiments were carried out, self-synchronization and frequency hopping phenomenon were both observed, and results agree well with theoretical deduction and simulation results. These results provide theoretical foundations for multihammer synchronous vibration system and its synchronous control.

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Wang, Xiaoying, Zhenping Wei, Charles Zuwu Baysah, Meiling Zheng, and Jinfeng Xing. "Biomaterial-based microstructures fabricated by two-photon polymerization microfabrication technology." RSC Advances 9, no. 59 (2019): 34472–80. http://dx.doi.org/10.1039/c9ra05645a.

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Two-photon polymerization (TPP) microfabrication technology can freely prepare micro/nano structures with different morphologies and high accuracy for micro/nanophotonics, micro-electromechanical systems, microfluidics, tissue engineering and drug delivery.

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Zhuang, Xiaoying, Binh Huy Nguyen, Subbiah Srivilliputtur Nanthakumar, Thai Quoc Tran, Naif Alajlan, and Timon Rabczuk. "Computational Modeling of Flexoelectricity—A Review." Energies 13, no. 6 (March 12, 2020): 1326. http://dx.doi.org/10.3390/en13061326.

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Electromechanical coupling devices have been playing an indispensable role in modern engineering. Particularly, flexoelectricity, an electromechanical coupling effect that involves strain gradients, has shown promising potential for future miniaturized electromechanical coupling devices. Therefore, simulation of flexoelectricity is necessary and inevitable. In this paper, we provide an overview of numerical procedures on modeling flexoelectricity. Specifically, we summarize a generalized formulation including the electrostatic stress tensor, which can be simplified to retrieve other formulations from the literature. We further show the weak and discretization forms of the boundary value problem for different numerical methods, including isogeometric analysis and mixed FEM. Several benchmark problems are presented to demonstrate the numerical implementation. The source code for the implementation can be utilized to analyze and develop more complex flexoelectric nano-devices.

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Journal articles on the topic 'Electromechanical Engineering'

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