Artículos de revistas: "Smart structure"

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Hurlebaus, S. y L. Gaul. "Smart structure dynamics". Mechanical Systems and Signal Processing 20, n.º 2 (febrero de 2006): 255–81. http://dx.doi.org/10.1016/j.ymssp.2005.08.025.

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Abdullah, Ermira Junita, Dayang Laila Abang Abdul Majid, Lim Gui Yuan y Nurul Fareha Harun. "Performance Analysis of Smart Composite Structure Using Shape Memory Alloy Actuators". Applied Mechanics and Materials 225 (noviembre de 2012): 361–66. http://dx.doi.org/10.4028/www.scientific.net/amm.225.361.

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Smart structures are able to adapt, alter or change in response to external stimuli. The analysis and design of smart structures involves a highly multi-disciplinary effort which includes structures, materials, dynamics, control and design. Shape memory alloy (SMA) is a suitable candidate for actuator in the smart structure design as it can be activated to alter the shape of the structure. This paper proposes a design for smart composite structure suitable for aerospace applications. Finite element method (FEM) was used to analyze a designer structure which is able to meet the requirements for smart structure as well as determining the placement of the actuators within the structure. Due to the nonlinear behavior of the SMA actuator, it is critical to incorporate a feedback control system that is able to accurately morph the structure. A prototype of the smart composite structure was fabricated and its performance was analyzed.

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3

Lin, Xueqi, Bing Wang, Shuncong Zhong, Hui Chen y Dianzi Liu. "Smart driving of a bilayered composite tape-spring structure". Journal of Physics: Conference Series 2403, n.º 1 (1 de diciembre de 2022): 012042. http://dx.doi.org/10.1088/1742-6596/2403/1/012042.

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Abstract Composite tape-springs (CTS) structure has been applied to spatial developable structures due to its bistability. There is growing interest in smart driving of the CTS-based structures because of the limitations on the working environment. Here, we propose a detailed analysis of the smart driving of the CTS structure. This is achieved by using smart materials to develop a bilayered CTS intelligent structure: the smart material forms the active layer to generate stress/strain to drive the structure; the CTS layer acts as a passive layer where its intrinsic bistability, designability further enriches the diversity of intelligent morphing structures. A theoretical analytical model is developed to anticipate the bistability; the stability criteria are then determined to guide the intelligent morphing design. These will facilitate the future smart driving design of aerospace deployable structures.

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4

KOMATSU, Keiji. "Introduction to Smart Structure". Journal of the Society of Mechanical Engineers 102, n.º 963 (1999): 63. http://dx.doi.org/10.1299/jsmemag.102.963_63.

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5

Gackstatter, Christian G. y Todd A. Story. "Smart structure manufacturing methods". Matériaux & Techniques 82, n.º 11 (1994): 13–17. http://dx.doi.org/10.1051/mattech/199482110013.

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6

Measures, Raymond M. "Smart materials and structure". Journal of the Acoustical Society of America 87, S1 (mayo de 1990): S15. http://dx.doi.org/10.1121/1.2028076.

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7

TAKEYA, H., T. OZAKI y N. TAKEDA. "SMS-30: Fabrication of Highly Reliable Advanced Grid Structure(SMS-V: SMART MATERIALS AND STRUCTURES, NDE)". Proceedings of the JSME Materials and Processing Conference (M&P) 2005 (2005): 43–44. http://dx.doi.org/10.1299/jsmeintmp.2005.43_3.

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8

Leschenko, V. A. y L. Yu Taran. "Smart Manufactory in The Structure of a Smart Enterprise". Control Systems and Computers, n.º 5 (289) (diciembre de 2020): 42–51. http://dx.doi.org/10.15407/csc.2020.05.042.

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Introduction. The organization of business at specific enterprises must comply with modern economic conditions, use the information, experience and knowledge of employees and managers. Modern production facilities are characterized by a high degree of organization and technological equipment. To manage such industries, new methods are needed using intelligence and automation, which requires more detailed analysis. First of all, this concerns the shop as the main component of the production process, which is the subject of this article. Purpose of the article. To develop a conceptual model of a smart shop as an element of the production structure of a smart enterprise and detail its elements for the purpose of further software implementation. Conclusion. The proposed concept of a smart shop takes into account the needs of modern industries and the modern capabilities of intellectualization and automation tools. It defines the necessary elements for the organization of modern production and its workshops. A detailed description of each element of such a workshop gives a clear idea of the further software implementation of this development using modern technologies. The proposed approach can be used in the development of other components of a smart enterprise, which is relevant at the moment.

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9

Whittle, M. y W. A. Bullough. "The structure of smart fluids". Nature 358, n.º 6385 (julio de 1992): 373. http://dx.doi.org/10.1038/358373a0.

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10

Koh, Y. L., N. Rajic, W. K. Chiu y S. Galea. "Smart structure for composite repair". Composite Structures 47, n.º 1-4 (diciembre de 1999): 745–52. http://dx.doi.org/10.1016/s0263-8223(00)00048-9.

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11

TANAKA, Hiroaki. "High Accuracy Space Structure System by Using Smart Structures". Proceedings of Mechanical Engineering Congress, Japan 2019 (2019): F19105. http://dx.doi.org/10.1299/jsmemecj.2019.f19105.

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12

Qu, Jun Tian, Xiao Yang y Yu Chen Xiao. "Dual PD Control of Flexible Smart Structure Based on LQR Algorithm". Applied Mechanics and Materials 437 (octubre de 2013): 634–38. http://dx.doi.org/10.4028/www.scientific.net/amm.437.634.

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The flexible smart structure is broadly applied in various fields. In order to reduce the vibration of smart structures, a dual loop PD control strategy is proposed based on the Lagrangian dynamics mathematical modeling of the flexible system and a revision of the traditional LQR algorithm, the simulation and physical experiments show that the proposed approach is efficient in controlling and damping out the vibration and disturbance in flexible smart structure system.

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13

DOS SANTOS E LUCATO, S. L., R. M. MCMEEKING y A. G. EVANS. "SMS-12: Shape Morphing Truss Structure for Aerospace and Marine Applications(SMS-II: SMART MATERIALS AND STRUCTURES, NDE)". Proceedings of the JSME Materials and Processing Conference (M&P) 2005 (2005): 30. http://dx.doi.org/10.1299/jsmeintmp.2005.30_4.

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14

Bemanian, Mohammad Reza, Mohammadjavad Mahdavinejad, Ali Karam y Shahabeddin Ramezani. "Application of Combined-Scale Smart Structures as a Necessity for Multifunctional Spaces". Advanced Materials Research 403-408 (noviembre de 2011): 4132–36. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4132.

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Suitable applications of smart structures for multifunctional spaces are going to be found by this paper. Logical argumentation research method is applied to identify a special smart structure which its features match to architectural requirements of multifunctional spaces. Hence, the smartness of architectural structures has two distinct scales: nanoscale and real scale, the application of these structures is based on two scales. Nanoscale smart structures have the capabilities which differ from real-scale smart structures. The analysis of features of multifunctional spaces shows that these kinds of spaces require structures which are smart both in nanoscale and real scale. As a result, combined-scale smart structures are recommended for multifunctional spaces.

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15

Brenneis, Matthias y Peter Groche. "Integration of Piezoceramic Tube under Prestress into a Load Carrying Structure". Advanced Materials Research 966-967 (junio de 2014): 651–58. http://dx.doi.org/10.4028/www.scientific.net/amr.966-967.651.

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Smart structures consisting of a load carrying structure and smart materials with actuatory and sensory capabilities feature high potential in numerous applications. However, to master the assembly conditions of smart structures, there is a need to integrate additional design parameters such as prestress of the smart material, critical loads and electric contacting as well as insulation into the process development. This paper focusses on the design of an incremental bulk forming process to integrate piezoceramic components into an aluminum tube simultaneously to the manufacturing process. Axial forces imposed on the piezoceramic are investigated numerically and experimentally to verify the design of critical components and the process control. Within this investigation, in situ measurement of the direct piezoelectric effect provides a method to validate the numerical design with regard to failure of the piezo tube and the functional properties of the overall structure.

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16

Waghulde, K. B. y Dr Bimlesh Kumar. "Vibration Analysis of Cantilever Smart Structure by using Piezoelectric Smart Material". International Journal on Smart Sensing and Intelligent Systems 4, n.º 3 (2011): 353–75. http://dx.doi.org/10.21307/ijssis-2017-444.

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17

Vasanthanathan, A., S. Menaga y K. Rosemi. "A Comprehensive Review of Smart Systems through Smart Materials". Current Materials Science 12, n.º 1 (5 de agosto de 2019): 77–82. http://dx.doi.org/10.2174/2212797612666190408141830.

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Background:The vital role of smart materials in the field of aircraft, spacecraft, defence, electronics, electrical, medical and healthcare industries involve sensing and actuating for monitoring and controlling applications. The class of smart materials are also named as active materials or intelligent materials or adaptive materials. These materials act intelligently based upon the environmental conditions. Structures incorporated with smart materials are named as smart structures.Methods:The principal objective of the present paper is to explore a comprehensive review of various smart materials viz. piezoelectric materials, Shape Memory Alloy, micro sensors and fibre optic sensors. The significance of these intelligent materials in various fields are also deliberately presented in this work from the perspective of Patents and literatures test data.Results:Smart Materials possesses multifunctional capabilities. The smart materials viz. piezoelectric materials, Shape Memory Alloy, micro sensors and fibre optic sensors are embedded with structures like aircraft, spacecraft, automotive, bridges, and buildings for the purpose of exhibiting Structural Health Monitoring system. Smart materials are finding increasing applications in the present aircraft, spacecraft, automotive, electronics and healthcare industries.Conclusion:Innovative ideas would become reality by integrating the any structure with Smart Materials.

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18

Raja, M. Ganesh y S. Narayanan. "Simultaneous Optimization of Structure and Control of Smart Tensegrity Structures". Journal of Intelligent Material Systems and Structures 20, n.º 1 (30 de julio de 2008): 109–17. http://dx.doi.org/10.1177/1045389x08089536.

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19

Yang, Ming y Jie Zeng. "Smart structure in automatic test system". JOURNAL OF ELECTRONIC MEASUREMENT AND INSTRUMENT 2009, n.º 6 (9 de diciembre de 2009): 93–97. http://dx.doi.org/10.3724/sp.j.1187.2009.06093.

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20

Katebi, M. R. "Control Design for Smart Flexible Structure". IFAC Proceedings Volumes 26, n.º 2 (julio de 1993): 597–600. http://dx.doi.org/10.1016/s1474-6670(17)48797-0.

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21

Chiu, W. K., Y. L. Koh, S. C. Galea y N. Rajic. "Smart structure application in bonded repairs". Composite Structures 50, n.º 4 (diciembre de 2000): 433–44. http://dx.doi.org/10.1016/s0263-8223(00)00110-0.

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22

Elliott, Stephen J. y Christopher A. Shera. "The cochlea as a smart structure". Smart Materials and Structures 21, n.º 6 (30 de mayo de 2012): 064001. http://dx.doi.org/10.1088/0964-1726/21/6/064001.

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23

Kageyama, Kazuro, Isao Kimpara, Toshio Suzuki, Isamu Ohsawa y Taro Shimamura. "Fundamental Study on Smart Structure Approach to Marine Structure". Journal of the Society of Naval Architects of Japan 1995, n.º 178 (1995): 583–91. http://dx.doi.org/10.2534/jjasnaoe1968.1995.178_583.

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24

Murayama, Hideaki, Kazuro Kageyama, Isao Kimpara, Toshio Suzuki, Isamu Ohsawa y Makoto Kanai. "Fundamental Study on Smart Structure Approach to Marine Structure". Journal of the Society of Naval Architects of Japan 1998, n.º 184 (1998): 513–22. http://dx.doi.org/10.2534/jjasnaoe1968.1998.184_513.

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25

Phoenix, Austin A. y Pablo A. Tarazaga. "Thermal morphing anisogrid smart space structures: Part 1. Introduction, modeling, and performance of the novel smart structural application". Journal of Vibration and Control 24, n.º 13 (20 de junio de 2017): 2853–72. http://dx.doi.org/10.1177/1077546317715545.

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To meet the requirements for the next generation of space missions, a paradigm shift is required from current structures that are static, heavy, and stiff to innovative structures that are adaptive, lightweight, versatile, and intelligent. The largest benefit provided by this new structural concept is in the ability to deliver high precision position stability. The conventional high precision structural design uses two decoupled systems to achieve positional stability. First, a high mass structure delivers the effectively infinite stiffness and thermal stability so that no deformations occur under all operational loading conditions. Second, to meet the morphing and on-orbit positional requirements, supplementary mechanisms provide the nano, micro, and macro displacement control required. This paper proposes the use of a novel morphing structure, the thermally actuated anisogrid morphing boom, to meet the design requirements through actively morphing the primary structure in order to adapt to the on-orbit environment and meet both requirements in a consolidated structure. The proposed concept achieves the morphing control through the use of thermal strain to actuate the individual helical members in the anisogrid structure. Properly controlling the temperatures of multiple helical members can introduce six degree of freedom morphing control. This system couples the use of low coefficient of thermal expansion materials with precise thermal control to provide the high precision morphing capability. This concept has the potential to provide substantial mass reductions relative to current methods and meet the high precision displacement requirements of spacecraft systems. This paper will detail the concept itself, demonstrate the modeling procedure, and investigate the design space to quantify the potential of the thermally morphing anisogrid smart structure.

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26

Park, Joonsuu y KeeHyun Park. "A Lightweight Blockchain Scheme for a Secure Smart Dust IoT Environment". Applied Sciences 10, n.º 24 (14 de diciembre de 2020): 8925. http://dx.doi.org/10.3390/app10248925.

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Since a smart dust Internet of Things (IoT) system includes a very large number of devices sometimes deployed in hard-access areas, it is very difficult to prevent security attacks and to alleviate bottleneck phenomena. In this paper, we propose a lightweight blockchain scheme that helps device authentication and data security in a secure smart dust IoT environment. To achieve our goals, (1) we propose the structure of the lightweight blockchain and the algorithm of processing the blockchain. In addition, (2) we reorganize the linear block structure of the conventional blockchain into the binary tree structure in such a way that the proposed blockchain is more efficient in a secure smart dust IoT environment. Experiments show that the proposed binary tree-structured lightweight blockchain scheme can greatly reduce the time required for smart dust device authentication, even taking into account the tree transformation overhead. Compared with the conventional linear-structured blockchain scheme, the proposed binary tree-structured lightweight blockchain scheme achieves performance improvement by up to 40% (10% in average) with respect to the authentication time.

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27

Cimellaro, G. P., Tsu Teh Soong y A. M. Reinhorn. "Integrated Design of Smart Structures". Advances in Science and Technology 56 (septiembre de 2008): 127–36. http://dx.doi.org/10.4028/www.scientific.net/ast.56.127.

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Much of structural control research and applications in civil engineering have been concerned with structures equipped with passive, hybrid, or active control devices in order to enhance structural performance under extraordinary loads. In most cases, the structure and the control system are individually designed and optimized. On the other hand, an exciting consequence of structural control research is that it also opens the door to new possibilities in structural forms and configurations, such as lighter buildings or bridges with longer spans without compromising on structural performance. Moreover, this can only be achieved through integrated design of structures with control elements as an integral part. This paper addresses the integrated design of structures with imbedded control systems and devices. Simultaneous optimization of such controlled structures is considered, showing that new structural forms and configurations can be achieved through integrated design.

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28

Song, Ruiyu. "The Progress of Magnetoactive Origami Structures". Journal of Physics: Conference Series 2230, n.º 1 (1 de marzo de 2022): 012024. http://dx.doi.org/10.1088/1742-6596/2230/1/012024.

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Abstract Contemporarily, smart materials are utilized for origami fabrication to achieve self-assembly under external stimulation. This technique provides a method to realize remote control of origami structures that can be applied to a variety of areas, e.g., biomedicine and robotics. Thereinto, magnetoactive origami structures were demonstrated in many studies, including the fields of medicine, soft robotics, biotic structure. Their design and manufacture incorporate structural mechanisms, material and additive manufacturing technology, as well as control strategies. This review summarizes existing magnetoactive origami structures as well as their materials and properties. Besides, potential directions and development suggestions are proposed for researchers in the fields of both origami structure and smart magneto-sensitive smart soft materials.

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Jin, Wen Cheng, Juan Wan, Qing Rong Ding y Chang Dong Zhou. "Smart Structure Based on Continuous Optical Fiber Sensing Technique (Review)". Applied Mechanics and Materials 71-78 (julio de 2011): 4138–41. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.4138.

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Continuous optical fiber sensing technique has the advantages of continuous measurement, corrosion preventing, anti-electromagnetic interference and high precision. This paper integrates continuous optical fiber into smart structure system. It combines the advantages of continuous optical fibers with self-adapting function of smart structures. It may have wide uses in engineering. But it is developing. It has some key technologies to be solved, such as the manufacture and embedment technique of special optical fibers, optimized arrangements of fibers, smart identification of the signal, analysis processing for enormous data and realization of self-adapting function.

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30

M'CHIRGUI, ZOUHAÏER. "SMALL WORLD CHARACTERISTICS OF INNOVATIVE SMART CARD NETWORKS". International Journal of Innovation Management 14, n.º 02 (abril de 2010): 221–52. http://dx.doi.org/10.1142/s1363919610002623.

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The paper examines the evolving innovative network structure in the smart card industry between 1992 and 2006. The aim is to search for sub-groups within the main network which allowed better understanding of the global innovative network structure and the speed of the smart card innovation system. Based on a proprietary database covering inter-firm agreements in the smart card industry, our empirical results reveal the existence of small-world structures, widely thought to enhance creativity and knowledge diffusion, and the emergence of giant components of innovative networks. Three notable features of this small world structure were the presence of broker incumbents, the decrease of average degree, and the increase of average distance of the networks.

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31

Lee, Jang Won y Young Shin Lee. "The Effects of Fluid Structure Interactions on the Dynamic Characteristics of the Reactor Internals Structure of SMART". Applied Mechanics and Materials 752-753 (abril de 2015): 851–58. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.851.

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The Korea Atomic Energy Research Institutes has been developing the SMART (System integrated Modular Advanced ReacTor), an environment-friendly nuclear reactor, for the generation of electricity, and to perform desalination. SMART reactors can be exposed to various external and internal loads caused by seismic and coolant flows. Reactor structures need to be maintained for the reactor’s safety and integrity against these loads during the operational time of the SMART. This paper presents two FE-models, 3-D solid models of the reactor internals in the air and in the coolant, and then compares the results of the dynamic characteristic for the two FE-models using a commercial Finite Element tool, ANSYS V12. A solver was selected by the Block Lanczos method. These FE-models are looking forward to being executed in various researches concerning the SMART in further studies.

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32

Verma, Shivam, Saurabh Kango, Ashok Kumar Bagha y Shashi Bahl. "Finite element model updating of smart structures with direct updating algorithm". Physica Scripta 97, n.º 5 (18 de abril de 2022): 055702. http://dx.doi.org/10.1088/1402-4896/ac64d3.

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Abstract In this paper, a finite element model updating algorithm is proposed to enhance the accuracy of the simulated finite element model of a smart structure (collocated piezoelectric patches embedded on a cantilever beam). Piezoelectric patches are used to sense and control the excessive vibrations of the structures. Mostly, they are mounted on flexible structures to measure their response at different excitations. The finite element method can be used to model the beam embedded with collocated piezoelectric patches. The complete finite element formulation of the smart structure is briefly described in this paper. There are different types of uncertainties that may be present in the simulated finite element model of a smart structure such as uncertainty in the structural boundary conditions, in the material elastic properties, the dimensions of the structure, piezoelectric elastic and electric properties, and the location of the piezoelectric patches mounted on the structure. In the present analytical study, the above uncertainties present in the smart structure are reduced by using the direct updating algorithm. It is found that the direct updating method through updating the mass and the stiffness matrices of the smart structure successfully enhance the accuracy of the simulated finite element model of the beam embedded with PZT patches. The state-space method is used to predict the response in the frequency domain. The maximum percentage error in the simulated finite element model of the piezoelectric embedded beam structure due to its structural and the electrical property uncertainty is 10.36% and 23.52% respectively and that was completely removed by using the direct updating algorithm. The optimal location of the piezoelectric patches is also taken as uncertainty which is successfully updated by using the proposed direct updating algorithm. The maximum percentage error in the natural frequencies of the smart structure due to location uncertainty is 18.39% which was also completely removed. To validate the outcomes, a frequency response function (FRF) is plotted.

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33

Xu, Rui, DongXu Li, Jianping Jiang y Jie Zou. "Decentralized adaptive fuzzy vibration control of smart gossamer space structure". Journal of Intelligent Material Systems and Structures 28, n.º 12 (23 de febrero de 2017): 1670–81. http://dx.doi.org/10.1177/1045389x16679023.

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Gossamer space structures technology have gained widely applications in space missions. However, the vibration problem is a great challenge which makes the technology complicated. The overall motivation of this work is to develop a vibration control system for gossamer space structures. In this study, a space membrane structure with piezoelectric stack actuators bracketed on its support frame is considered. First, the description of the smart space membrane structure and its dynamic model are presented. Then, a decentralized adaptive fuzzy control method is developed to control the structure vibration. Finally, experimental system is built up, and two vibration control experiment cases are carried out to verify the proposed control method. Experimental results demonstrate that the proposed control method is more effective than the fuzzy control method.

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Jung, Hyung Jo, Dong Doo Jang, Heon Jae Lee y Seok Jun Moon. "Experimental Investigation of Effectiveness of Smart Passive System for Seismic Protection of Building Structures". Advances in Science and Technology 56 (septiembre de 2008): 355–62. http://dx.doi.org/10.4028/www.scientific.net/ast.56.355.

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The newly developed smart passive system is based on a magnetorheological fluid (MR) damper, which is one of the most promising semiacitve control devices, and an electromagnetic induction (EMI) part, which is a power harvesting device from vibration of a structure according to Faraday’s law of electromagnetic induction. Numerical simulations recently conducted by the authors have verified that the smart passive system could be effective to reduce the structural responses in the cases of civil engineering structures such as buildings and bridges. On the other hand, the experimental validation of the system is not sufficiently carried out yet. In this study, therefore, a series of shaking table tests are conducted to experimentally investigate the effectiveness of the smart passive system for seismic protection of building structure. The model structure is a scaled six-story frame structure with the height of 3.5 m and the weight of about 8 ton. The smart passive system is installed between its base floor and the first floor. The responses of the structure are measured under several ground motions including scaled historic earthquake records. The preliminarily experimental results in the smart passive system case are compared with those in the MR damper-based semiactive control cases.

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35

Zheng, Jin, Bo Chen y Jian Feng Wei. "Protection of Earthquake-Disturbed Workshop Building by Using Piezoelectric Smart Devices". Applied Mechanics and Materials 44-47 (diciembre de 2010): 168–72. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.168.

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The feasibility of using piezoelectric smart devices to develop a smart material-structure system and thereby to prevent structure from earthquake is carried out in this study. The piezoelectric actuators are utilized to develop a smart friction damper with controllable parameters. The interaction of a smart material-structure system is analyzed through the numerical integral and iteration. The seismic mitigation of the dynamic responses of a workshop structure with the piezoelectric smart controllers is conducted through a proposed semi-active control strategy. It is observed that the structural seismic responses can be remarkably mitigated under the protection of the smart system..

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36

Peng, Jingyi, Yuhang Jing y Zhipeng Liu. "Structure Design of Smart Reminder Medicine Box". Journal of Physics: Conference Series 1802, n.º 3 (1 de marzo de 2021): 032127. http://dx.doi.org/10.1088/1742-6596/1802/3/032127.

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37

Shepherd, Helena. "Smart molecular materials: synthesis, structure and properties". Acta Crystallographica Section A Foundations and Advances 77, a2 (14 de agosto de 2021): C629. http://dx.doi.org/10.1107/s0108767321090668.

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38

Qiao, Yin-hu, Jiang Han, Chun-yan Zhang y Jie-ping Chen. "Modeling Smart Structure of Wind Turbine Blade". Applied Composite Materials 19, n.º 3-4 (17 de junio de 2011): 491–98. http://dx.doi.org/10.1007/s10443-011-9210-2.

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39

Anjanappa, M. y J. Bi. "Magnetostrictive mini actuators for smart structure applications". Smart Materials and Structures 3, n.º 4 (1 de diciembre de 1994): 383–90. http://dx.doi.org/10.1088/0964-1726/3/4/001.

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40

ISHIZUKA, Shinichi. "B19 Multiobjective Optimization of Smart Structure System". Proceedings of the Symposium on the Motion and Vibration Control 2005.9 (2005): 266–70. http://dx.doi.org/10.1299/jsmemovic.2005.9.266.

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41

Chen, Y., V. Wickramasinghe y D. G. Zimcik. "DEVELOPMENT OF SMART STRUCTURE SYSTEMS FOR HELICOPTER VIBRATION AND NOISE CONTROL". Transactions of the Canadian Society for Mechanical Engineering 31, n.º 1 (marzo de 2007): 39–56. http://dx.doi.org/10.1139/tcsme-2007-0003.

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Helicopters are susceptible to high vibratory loads, excessive noise levels and poor flight stability compared to fixed-wing aircraft. The multidisciplinary nature of helicopter structures offers many opportunities for the innovative smart structure technology to improve helicopter performance. This paper provides a review of smart structures research at the National Research Council Canada for helicopter vibration and cabin noise control applications. The patented Smart Spring approach is developed to vary the blade impedance properties adaptively to reduce the vibratory hub loads transmitted to the fuselage by vibration reduction at the source. A smart gearbox strut and active structural acoustic control technologies are investigated to suppress the vibration and tonal gear meshing noise into the cabin either by modifying the vibration load transmission path, or weakening the coupling between exterior and cabin acoustic fields. Two adaptive seat mount concepts are proposed to reduce the vibration of the aircrew directly to improve ride quality of the vehicle.

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42

Malgaca, L. y H. Karagülle. "Numerical and Experimental Study on Integration of Control Actions into the Finite Element Solutions in Smart Structures". Shock and Vibration 16, n.º 4 (2009): 401–15. http://dx.doi.org/10.1155/2009/246419.

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Piezoelectric smart structures can be modeled using commercial finite element packages. Integration of control actions into the finite element model solutions (ICFES) can be done in ANSYS by using parametric design language. Simulation results can be obtained easily in smart structures by this method. In this work, cantilever smart structures consisting of aluminum beams and lead-zirconate-titanate (PZT) patches are considered. Two cases are studied numerically and experimentally in parallel. In the first case, a smart structure with a single PZT patch is used for the free vibration control under an initial tip displacement. In the second case, a smart structure with two PZT patches is used for the forced vibration control under harmonic excitation, where one of the PZT patches is used as vibration generating shaker while the other is used as vibration controlling actuator. For the two cases, modal analyses are done using chirp signals; Control OFF and Control ON responses in the time domain are obtained for various controller gains. A non-contact laser displacement sensor and strain gauges are utilized for the feedback signals. It is observed that all the simulation results agree with the experimental results.

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Moutsopoulou, Amalia John, Georgios E. Stavroulakis y Anastasios D. Pouliezos. "Novelty of Frequency Domain Data in Smart Structures using ?-Analysis". European Journal of Engineering and Technology Research 4, n.º 4 (28 de abril de 2019): 131–38. http://dx.doi.org/10.24018/ejeng.2019.4.4.1253.

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This paper deals with the advantages of robust control in smart structures. First we present the implementations of H infinity control in the frequency domain. A dynamic model for smart structure under wind excitations is considered. Then robust control theory is used a model to synthesize controllers achieving stabilization with guaranteed performance for smart structures. We use ?-analysis to express the control problem as a mathematical optimization problem and then find the controller that solves the optimization problem in the frequency domain.

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44

Li, Jie, Li Li Hu, Li Qin, Jun Liu, Rui Ping Tao y Xi Ning Yu. "Dynamic Analysis of Piezoelectric Smart Structures". Advanced Materials Research 295-297 (julio de 2011): 1353–56. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1353.

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In order to solve the active vibration control of piezoelectric smart structures, focus problems on the structural analysis of the dynamic characteristics. To piezoelectric smart structure for the research object, finite element modal analysis, solving the natural frequency and response characteristics. Firstly, analyzed the problems of structural eigenvalues and eigenvectors problems, then prepared dynamic response analysis program of FEM based on MATLAB, and complete the theoretical model calculations. At the same time, using ANSYS software to simulate and analyze, theresults show that, ANSYS simulation result is consistent with the theoretical value, so as to study the piezoelectric active vibration control of smart structures and lay a good foundation.

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45

Wang, Wei Yuan, Kai Xue y Dong Yan Shi. "Optimal Research of Actuator Placement for Piezoelectric Smart Structure". Key Engineering Materials 419-420 (octubre de 2009): 173–76. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.173.

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The purpose of this paper is to investigate the optimal placement of piezoelectric actuator for active vibration control of smart structure. The structures can be described in the modal space based on the independent modal space control method and dynamic equations derived from finite element model. The modal damping ratios are derived from modal equations and an optimal target is given by maximizing the modal damping ratios. Accumulation method is adopted to the optimization calculation. Simulations are carried out for active vibration control of a conical shell with distributed piezoelectric actuators. Control effects proved the validity of the optimal method above by compared with the non-optimal results. The optimal method in this paper gives a useful guide for quantity optimization of actuators to piezoelectric structures.

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46

Chen, Bo, Jin Zheng y Jian Ping Wang. "Performance Assessment on Base-Isolated Smart Material-Structure System by Using Magnetorheological Fluids". Advanced Materials Research 97-101 (marzo de 2010): 3268–71. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3268.

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The feasibility of using MR fluids to develop a smart material-structure system and thereby to prevent structure from catastrophic damage is actively carried out in this study. The MR smart fluids are utilized to develop a smart damper with controllable parameters and the mechanical model of MR devices is presented by involving the effects of damper's axial stiffness. The interaction of a smart material-structure system is analyzed through the numerical integral and iteration. The vibration mitigation of the dynamic responses of an engineering structure with the smart coupled system is conducted based on the intelligent fuzzy control for performance evaluation. It is observed that the structural internal forces such as shear forces and bending moments can be remarkably mitigated with the protection of the smart system.

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47

Walletzký, Leonard, Luca Carrubbo, Mouzhi Ge, Zuzana Schwarzová y Odonchimeg Bayarsaikhan. "Multi-Contextual Smart City Model for Service Interconnections". ITM Web of Conferences 51 (2023): 01001. http://dx.doi.org/10.1051/itmconf/20235101001.

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The key issue of smart city development usually lies in the understanding of the complexity of the services’ structure. Thus, smart city models are developed to improve current outlooks on Smart City Services’ structure by using service-dominant logic and service science. However, the contextual changes are usually not fully considered in the existing smart city models. It is in turn difficult to catch the changes among the layers in the smart city model. Therefore, in this paper, we propose a complex and innovative structure of smart city services. The main contribution of the proposed approach is to consolidate the interconnection of services that is affected by the changing context. It will also lead to a better understanding of the complexity in a smart city. The presented conceptual model has a direct influence on the practical development of a smart city. Since every country and city approaches the services’ structure differently, the smart city model is derived with the lack of a common understanding of various smart cities. In the case of accepting our model as a common solution, the sharing of knowledge and information among cities and countries would be easier and more valuable. The paper also shows how the current knowledge in service-dominant logic and service science helps to develop a new practical approach to understanding the smart city structure.

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48

Fu, Wen Hao. "Fatigue Damage Detection Using Smart Senor". Applied Mechanics and Materials 608-609 (octubre de 2014): 844–49. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.844.

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In civil engineering field, huge amount of structural health monitoring work is required throughout the service life of the structures. In pursuing an autonomous, real-time and online non-destructive evaluation (NDE) method, piezo-impedance transducer (PZT) has attracted more and more attention from researchers in recent years. Although up to now, the real application of Electro-Mechanical Impedance (EMI) method with PZT on structure health monitoring is not utilized, experiments results shows its impressive potential.

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49

Moutsopoulou, Amalia John, Georgios E. Stavroulakis y Anastasios D. Pouliezos. "Novelty of Frequency Domain Data in Smart Structures using μ-Analysis". European Journal of Engineering Research and Science 4, n.º 4 (28 de abril de 2019): 131–38. http://dx.doi.org/10.24018/ejers.2019.4.4.1253.

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This paper deals with the advantages of robust control in smart structures. First we present the implementations of H infinity control in the frequency domain. A dynamic model for smart structure under wind excitations is considered. Then robust control theory is used a model to synthesize controllers achieving stabilization with guaranteed performance for smart structures. We use μ-analysis to express the control problem as a mathematical optimization problem and then find the controller that solves the optimization problem in the frequency domain.

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50

Duan, Zhihao, Wenlong Feng, Wang Zhong, Mengxing Huang y Siling Feng. "Form Specification of Smart Contract for Intellectual Property Transaction Based on Blockchain". Wireless Communications and Mobile Computing 2022 (21 de agosto de 2022): 1–9. http://dx.doi.org/10.1155/2022/3274454.

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In view of the current chaotic structure of smart contracts and no unified definition of smart contracts, the implementation of smart contracts for the same business in the same field is quite different due to different development institutions and operating platforms, resulting in a low level of smart contract sharing and high development costs, hindering the development of smart contracts. Combined with the intellectual property transaction scenario, this paper proposes a blockchain-based intellectual property transaction smart contract form specification, designs the overall structure and process specification of the smart contract in the intellectual property transaction process, formulates a standard for the standardization of smart contract writing in intellectual property transaction scenarios, and solves the current chaotic structure of intellectual property transaction smart contracts, which is conducive to the collaborative development of scholars in various fields.

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