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Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Structural control technology"

Soong, T. T., A. M. Reinhorn, S. Aizawa, and M. Higashino. "Recent structural applications of active control technology." Journal of Structural Control 1, no. 1-2 (December 1994): 1–21. http://dx.doi.org/10.1002/stc.4300010101.

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Forrai, A., H. Funato, K. Kamiyama, and S. Hashimoto. "Structural control technology: system identification and control of flexible structures." Computing & Control Engineering Journal 12, no. 6 (December 1, 2001): 257–62. http://dx.doi.org/10.1049/cce:20010602.

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Hirsch, S. M., V. Jayachandran, and J. Q. Sun. "Structural-acoustic control for quieter aircraft interior-Smart Trim Technology." Composite Structures 42, no. 2 (June 1998): 189–202. http://dx.doi.org/10.1016/s0263-8223(98)00074-9.

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FUJITA, Satoshi. "Structural Control Technology for Realization of Safety and Reliable Society." Journal of the Society of Mechanical Engineers 114, no. 1106 (2011): 40–44. http://dx.doi.org/10.1299/jsmemag.114.1106_40.

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Marchamalo, M., D. Galán, J. A. Sánchez, and R. Martínez. "La tecnología DGPS en la construcción: control de movimientos en grandes estructuras." Informes de la Construcción 63, no. 522 (June 1, 2011): 93–102. http://dx.doi.org/10.3989/ic.10.008.

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Akkaram, Srikanth, Jean-Daniel Beley, Bob Maffeo, and Gene Wiggs. "Analytical derivatives technology for structural shape design." Structural and Multidisciplinary Optimization 34, no. 2 (December 12, 2006): 165–78. http://dx.doi.org/10.1007/s00158-006-0069-z.

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Zhu, Yong Jian. "Research on Control Technology and Structural Characteristics of Very Instable Surrounding Rocks in Structural Belt." Advanced Materials Research 261-263 (May 2011): 1743–48. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1743.

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According to the actual state of the 1150 horizontal main haulageway of Tailai colliery is in the affected areas of many faults, both on the roof to floor and two sides convergences are about 1000mm,the YTJ20 strata structure detector was used to detect the strata structure character of the roadway roof, it showed the surrounding rock of 1150 horizontal main haulageway is very broken and the maximum failure depth reached to 6m; meanwhile we took 4 group of rock samples from the broken zone to carry out x diffraction, the results showed that the surrounding rock in the broken contained high expansibility rock, so measure of rock surrounding grouting reinforcement was proposed without changing the original supporting parameters. Comparative analysis of rock surrounding reinforcement effect before and after grouting was calculated by FLAC simulation soft. The result shows only supported “bolts + shotcrete layer + cables”, both the deformation speed and deformation amount are very obviously, the community of “rock-support” shows loose and breaking state; But using the combined supporting method of grouting reinforcement and “bolts + shotcrete layer + cables”, the surrounding rock deformation obtained effectively control with less stress release, the community of “rock-support” shows higher integrity degree, It can ensure the safe use of the roadway.

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Yang, J., S. S. Sun, S. W. Zhang, and W. H. Li. "Review of Structural Control Technologies Using Magnetorheological Elastomers." Current Smart Materials 4, no. 1 (July 2, 2019): 22–28. http://dx.doi.org/10.2174/2405465804666190326152207.

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It is critically important to protect civil structures from unpredictable events, including earthquakes and strong winds, as well as maintaining their structural integrity and serviceability. To this end, considerable attention has been paid on the research and development of aseismic technology. This paper provides a literature review on the recent progress of Magnetorheological Elastomer (MRE) and the development and application of MRE devices on structure control technology. Firstly, this paper reviewed the investigations into the MR effect, mechanical property of MRE and its ingredients during the past decades. Then, research interests arising in the implementation and development of smart devices using MREs on structure control will be systematically reviewed. Basically, MRE base isolation and MRE based tuned mass damper are two major technologies to attenuate structural vibration, which will be the main focus of this paper.

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Naito, Makio, Hiroya Abe, and Kazuyoshi Sato. "Nanoparticle Bonding Technology for the Structural Control of Particles and Materials." Journal of the Society of Powder Technology, Japan 42, no. 9 (2005): 625–31. http://dx.doi.org/10.4164/sptj.42.625.

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Zhou, Lijun, and Qinghong Zhao. "Research on Structural Seismic and Vibration Control Technology of Modern Buildings." IOP Conference Series: Earth and Environmental Science 526 (July 8, 2020): 012181. http://dx.doi.org/10.1088/1755-1315/526/1/012181.

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Дисертації з теми "Structural control technology"

O'Sullivan, Donald Quinn 1970. "Aircraft interior structural-acoustic control design." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9888.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Technology and Policy Program, 1998.
Includes bibliographical references (p. 177-184).
by Donald Quinn O'Sullivan.
S.M.

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Behkami, Nima A. "Examining Health Information Technology Implementations: Case of the Patient-Centered Medical Home." PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/237.

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It has been shown that the use of Health Information Technology (HIT) is associated with reduced cost and increased quality of care. This dissertation examined the use of registries in Patient Centered Medical Home (PCMH) practices. A survey questionnaire was sent to a nationwide group of clinics certified for being a PCMH. They were asked to provide information about their payer mix, implementation barriers, registry implementation, registry use, and clinic satisfaction. The survey instrument was validated by an expert panel which included practitioners and researchers. Statistical methods including Structural Equation Modeling were used for analysis and to test the research hypotheses. The majority of medical home practices that responded used some type of computerized registry, either with basic patient information or integrated with detailed clinical information. And on average, they somewhat used registries for population management, individual health management, proactive care and planned care visits. All practices encountered some combination of barriers when implementing a medical home program. Most practices reported clinic satisfaction at least improved after becoming a medical home. The results of the analysis show that indeed payer mix, in particular Medicare and private insurance, has a significant relationship with level of registry implementation. There were no significant relationships between barriers and registry implementation or use. More sophisticated registry implementation led to greater registry use. And registry use is associated with increased clinic satisfaction. This research fills an important gap in understanding Health IT use, registries in particular, among Patient-Centered Medical Homes. The findings suggest that: 1) Implementation barriers may not be influencing use of computerized registries in medical home practices; 2) Using more sophisticated computerized registries facilitates registry use, which can help improve clinic satisfaction; 3) Payer mix may influence use of more sophisticated Health IT in medical home practices.

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Dahan, Frédéric. "Qualification d'un systeme de controle acoustique structural actif." Aix-Marseille 2, 1996. http://www.theses.fr/1996AIX22110.

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Dans le domaine de la prediction, la modelisation numerique en vibro-acoustique (en regime harmonique) est exploitee pour etudier les systemes d'absorption active. L'etude porte sur le controle acoustique structural qui agit sur la structure a l'origine du bruit a supprimer. Or, cette methode conduit souvent a une amplification des vibrations structurales (effet spillover). Comment definir et qualifier un dispositif actionneurs/capteurs qui, a partir d'un controle local par anticipation de type lms, attenue efficacement le rayonnement global sans effet spillover ? en premier lieu, nous montrons que la sensibilite des mecanismes de controle s'oppose a la resolution modale du probleme. En revanche, une approche globale permet d'obtenir un dispositif qui atteint l'objectif fixe. La formulation dans l'espace des commandes, aide a definir une configuration d'actionneurs avec une commande ideale qui tient compte de la connaissance du modele. Il est demande ensuite a un nombre fini de senseurs d'estimer cette commande. Deux approches sont developpees. La premiere reside dans la definition d'un filtrage sur des capteurs de position predeterminee et la seconde sur l'optimisation des positions des senseurs. Avec la seconde methode, les capteurs sont places sur les nuds du champ residuel ideal. Ce resultat est analyse lorsque les nuds sont absents, puis valide experimentalement. La demarche proposee presente l'inconvenient d'etre tributaire du champ primaire. Nous proposons alors un moyen de discriminer les dispositifs de controle relativement a leur robustesse aux variations du champ primaire. La methode globale est finalement inseree dans un modele numerique de la cabine d'un avion couplee a son fuselage. Le nombre important de degres de liberte du modele elements finis suppose un traitement des operations pour reduire les temps de calcul. Les resultats obtenus fournissent des informations interessantes sur les mecanismes de controle d'une cavite vibrante

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Redmond, Brian L. "A workcell control and communications structure for the Georgia Institute of Technology Flexible Automation Laboratory." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/18946.

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Øslebø, Arne. "A diagrammatic notation for modeling access control in tree-based data structures." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2195.

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This thesis describe two graphical modeling languages that can be used for specifying the access control setup in most systems that store information in a tree based structure. The Tree-based Access control Modeling Language (TACOMA) is the simplest language that is defined. It is easy to learn and use as it has only 8 symbols and two relations. With this language it is possible to define the exact access control rules for users using a graphical notation. The simplicity of the language do however come at a cost: it is best suited for small or medium sized tasks where the number of users and objects being controlled are limited. To solve the scalability problem a second language is also presented. The Policy Tree-based Access control Modeling Language (PTACOMA) is a policy based version of TACOMA that doubles the number of symbols and relations. While it is harder to learn it scales better to larger tasks. It also allows for distributed specification of access rules where administrators of different domains can be responsible for specifying their own access control rules. Domains can be organized in a hierarchical manner so that administrators on a higher level can create policies that have higher priority and therefor limits what administrators at lower levels can do. The thesis describes the two languages in detail and provides a comparison between them to show the strong and weak points of each language. There is also a detailed case study that shows how the two languages can be used for specifying access control in SNMPv3.

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Zare, Firuz. "Multilevel converter structure and control." Thesis, Queensland University of Technology, 2001. https://eprints.qut.edu.au/36142/7/36142_Digitsed%20Thesis.pdf.

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In recent years, multilevel converters are becoming more popular and attractive than traditional converters in high voltage and high power applications. Multilevel converters are particularly suitable for harmonic reduction in high power applications where semiconductor devices are not able to operate at high switching frequencies or in high voltage applications where multilevel converters reduce the need to connect devices in series to achieve high switch voltage ratings. This thesis investigated two aspects of multilevel converters: structure and control. The first part of this thesis focuses on inductance between a DC supply and inverter components in order to minimise loop inductance, which causes overvoltages and stored energy losses during switching. Three dimensional finite element simulations and experimental tests have been carried out for all sections to verify theoretical developments. The major contributions of this section of the thesis are as follows: The use of a large area thin conductor sheet with a rectangular cross section separated by dielectric sheets (planar busbar) instead of circular cross section wires, contributes to a reduction of the stray inductance. A number of approximate equations exist for calculating the inductance of a rectangular conductor but an assumption was made that the current density was uniform throughout the conductors. This assumption is not valid for an inverter with a point injection of current. A mathematical analysis of a planar bus bar has been performed at low and high frequencies and the inductance and the resistance values between the two points of the planar busbar have been determined. A new physical structure for a voltage source inverter with symmetrical planar bus bar structure called Reduced Layer Planar Bus bar, is proposed in this thesis based on the current point injection theory. This new type of planar busbar minimises the variation in stray inductance for different switching states. The reduced layer planar busbar is a new innovation in planar busbars for high power inverters with minimum separation between busbars, optimum stray inductance and improved thermal performances. This type of the planar busbar is suitable for high power inverters, where the voltage source is supported by several capacitors in parallel in order to provide a low ripple DC voltage during operation. A two layer planar busbar with different materials has been analysed theoretically in order to determine the resistance of bus bars during switching. Increasing the resistance of the planar busbar can gain a damping ratio between stray inductance and capacitance and affects the performance of current loop during switching. The aim of this section is to increase the resistance of the planar bus bar at high frequencies (during switching) and without significantly increasing the planar busbar resistance at low frequency (50 Hz) using the skin effect. This contribution shows a novel structure of busbar suitable for high power applications where high resistance is required at switching times. In multilevel converters there are different loop inductances between busbars and power switches associated with different switching states. The aim of this research is to consider all combinations of the switching states for each multilevel converter topology and identify the loop inductance for each switching state. Results show that the physical layout of the busbars is very important for minimisation of the loop inductance at each switch state. Novel symmetrical busbar structures are proposed for multilevel converters with diode-clamp and flying-capacitor topologies which minimise the worst case in stray inductance for different switching states. Overshoot voltages and thermal problems are considered for each topology to optimise the planar busbar structure. In the second part of the thesis, closed loop current techniques have been investigated for single and three phase multilevel converters. The aims of this section are to investigate and propose suitable current controllers such as hysteresis and predictive techniques for multilevel converters with low harmonic distortion and switching losses. This section of the thesis can be classified into three parts as follows: An optimum space vector modulation technique for a three-phase voltage source inverter based on a minimum-loss strategy is proposed. One of the degrees of freedom for optimisation of the space vector modulation is the selection of the zero vectors in the switching sequence. This new method improves switching transitions per cycle for a given level of distortion as the zero vector does not alternate between each sector. The harmonic spectrum and weighted total harmonic distortion for these strategies are compared and results show up to 7% weighted total harmonic distortion improvement over the previous minimum-loss strategy. The concept of SVM technique is a very convenient representation of a set of three-phase voltages or currents used for current control techniques. A new hysteresis current control technique for a single-phase multilevel converter with flying-capacitor topology is developed. This technique is based on magnitude and time errors to optimise the level change of converter output voltage. This method also considers how to improve unbalanced voltages of capacitors using voltage vectors in order to minimise switching losses. Logic controls require handling a large number of switches and a Programmable Logic Device (PLD) is a natural implementation for state transition description. The simulation and experimental results describe and verify the current control technique for the converter. A novel predictive current control technique is proposed for a three-phase multilevel converter, which controls the capacitors' voltage and load current with minimum current ripple and switching losses. The advantage of this contribution is that the technique can be applied to more voltage levels without significantly changing the control circuit. The three-phase five-level inverter with a pure inductive load has been implemented to track three-phase reference currents using analogue circuits and a programmable logic device.

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Sourdille, Etienne. "Numerical simulation and control of a fluid structure interaction for a plate in a transverse flow." Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/47114/.

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The control of a moving structure in an unbounded flow has numerous applications in engineering, such as the aileron on an airplane. Here an approach is proposed where a CFD method is coupled with a controller to provide a qualitative flow model, and a tool for the development and the validation of the control scheme. A rotating rigid flat plate in transverse flow is considered. For the CFD, a discrete vortex method is used due to its relevance for separated flows, which implies approximating the flat plate by a thin ellipse. The simulation for a fixed plate has been completed with a plate approximated by a 20:1 ellipse and placed in an inviscid flow. A comparison with an image method is also undertaken. The results show encouraging features for modelling the vortex street, but also problems in the transient behaviour of the flow. The control method is based on fuzzy logic, and has shown a remarkable ability to adapt to the nonlinear nature of the force generated by the flow/structure system. Comparison is made with more classical schemes such as a controller based on optimal control theory using an intermediary flow/structure model, similar to a gain scheduling model, instead of the full simulation.

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Srinivas, Preethi. "Private Key Allocation based Access Control Scheme for Social Networks." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1281839737.

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Cowan, Thomas C. S. B. Massachusetts Institute of Technology. "Network control in a globalized world : how Visa and Swift's founding structures serve their stakeholders on the International stage." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112017.

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Thesis: S.B., Massachusetts Institute of Technology, Program in Science, Technology and Society, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 51-55).
The Visa credit card network and the Society for Worldwide Interbank Financial Telecommunications (Swift) network both provide a backbone for financial interchange across the world. Visa's network connects consumers, merchants, banks, and processors to ease the purchases of millions of consumer-facing products worldwide. Swift's interbank network connects banks, corporates, and other financial institutions to ease the flow of high-value, highly-secure international financial transactions. Both networks grew to become industry incumbents in the second half of the 20th century, connecting nearly every country on earth. However, the globalized networks differ in their organizational structures: Visa utilizes a centralized, U.S. focused, hub-and-spoke model; Swift uses a decentralized, transaction-volume neutral, point-to-point network. Although Visa's centralized network fosters innovation, standardization, and security, its U.S.-centered hub pulls the organization from global neutrality and aligns it with the United States on global issues. Meanwhile, although Swift's decentralized network nurtures technological localization-at the expense of technological standardizationits transaction-based global governing structure promotes a relative international neutrality among global organizations. This contrast between Visa and Swift-both networks that balance local and global, centralized and decentralized, and technical and non-technical tensions across the world-reveals the structural effects of worldwide networks, and how network system design impacts global stakeholders in the societies that they touch.
by Thomas C. Cowan.
S.B.

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Li, Kaixiang. "Structural vibration damping with synchronized energy transfer between piezoelectric patches." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00735788.

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Advanced materials such as carbon fiber, composite materials et al. are more and more used in modern industry. They make the structures lighter and stiffer. However, they bring vibration problems. Researchers studied numerous methods to eliminate the undesirable vibrations. These treatments are expected to be a compact, light, intellectual and modular system. Recently, a nonlinear technique which is known as Synchronized Switch Damping (SSD) technique was proposed. These techniques synchronously switched when structure got to its displacement extremes that leading to a nonlinear voltage on the piezoelectric elements. This resulting voltage showed a time lag with the piezoelectric strain thus causing energy dissipation. Based on the developed SSD techniques, a new synchronized switch damping e.g. Synchronized Switch Damping with Energy Transfer (SSDET) was proposed in this document. This method damped the vibration by using the energy from other vibrating form. The objectives of the work reported in this document were threefold. The first one consisted of introduction of SSDET principle and developing its control law. This part aimed at establishing the mathematical model and verifying the proposed method by mathematical tools. Then, the experimental validations were carried out. Three experiments with different configurations demonstrated that SSDET can be implemented not only between structures but also vibrating modes in one structure. A SSDET scheme with multi-patches was also investigated for improving the damping. Finally, a bidirectional SSDET concept was introduced based on the original SSDET technique. This technique be regarded as a multimode control SSDET. Since it privileged the target vibration while keeps a decent control effect on the source vibration.

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Книги з теми "Structural control technology"

Lu, Zheng, Sami F. Masri, and Xilin Lu. Particle Damping Technology Based Structural Control. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7.

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P, Mathur G., and Langley Research Center, eds. Structural acoustic prediction and interior noise control technology. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 2001.

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M, Abdel-Rohman, ed. Control of structures. Dordrecht: M. Nijhoff, 1986.

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Cornu, Jean. Fundamentals of Fusion Welding Technology. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988.

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Preumont, André. Vibration control of active structures: An introduction. 2nd ed. Dordrecht: Kluwer Academic Publishers, 2002.

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Georges, Magonette, and Marazzi Francesco, eds. Technology of semiactive devices and applications in vibration management. Hoboken, NJ: Wiley, 2006.

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H, Deacon D., ed. Steelwork corrosion control. 2nd ed. London: Spon, 2002.

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Tschätsch, Heinz. Applied Machining Technology. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2009.

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Weng, Yuqing. Advanced Steels: The Recent Scenario in Steel Science and Technology. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg and Metallurgical Industry Press, 2011.

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Частини книг з теми "Structural control technology"

Lu, Zheng, Sami F. Masri, and Xilin Lu. "Introduction to Structural Vibration Control Technology." In Particle Damping Technology Based Structural Control, 1–19. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_1.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Semi-active Control Particle Damping Technology." In Particle Damping Technology Based Structural Control, 331–69. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_9.

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Czichos, Horst. "Structural Health Monitoring and Performance Control." In Measurement, Testing and Sensor Technology, 203–8. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76385-9_12.

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He, Yuting, Teng Zhang, Binlin Ma, Xianghong Fan, and Xu Du. "Structural Integrity Control Technology Based on Structural Damage Monitoring." In ICAF 2019 – Structural Integrity in the Age of Additive Manufacturing, 938–55. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21503-3_74.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Origination, Development and Applications of Particle Damping Technology." In Particle Damping Technology Based Structural Control, 21–51. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_2.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Shaking Table Test Study on Particle Damping Technology." In Particle Damping Technology Based Structural Control, 187–224. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_6.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Wind Tunnel Test Study on Particle Damping Technology." In Particle Damping Technology Based Structural Control, 225–91. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_7.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Theoretical Analysis and Numerical Simulation of Particle Impact Dampers." In Particle Damping Technology Based Structural Control, 53–141. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_3.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Performance Analysis of Particle Dampers Attached to Single-Degree-of-Freedom (SDOF) Structures." In Particle Damping Technology Based Structural Control, 143–70. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_4.

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Lu, Zheng, Sami F. Masri, and Xilin Lu. "Performance Analysis of Particle Dampers Attached to Multi-degree-of-Freedom (MDOF) Structures." In Particle Damping Technology Based Structural Control, 171–86. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3499-7_5.

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Тези доповідей конференцій з теми "Structural control technology"

Niezrecki, Christopher, Harley Cudney, Christopher Niezrecki, and Harley Cudney. "Active control technology applied to rocket fairing structural vibrations and acoustics." In 38th Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1255.

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Andersen, G., Ed Forster, R. Kolonay, and F. Eastep. "A study of control surface blending for active aeroelastic wing technology." In 37th Structure, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-1443.

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HORIKAWA, H., and K. SAITO. "A wind tunnel study of active control technology on a high aspect ratio wing." In 27th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1986. http://dx.doi.org/10.2514/6.1986-956.

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Librescu, Liviu, Ohseop Song, and Sang-Yong Oh. "Vibration control of advanced rotating blades via incorporation of smart materials technology." In 40th Structures, Structural Dynamics, and Materials Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-1550.

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Manoharan, N. Senthil, G. Uma, M. Umapathy, and S. Meenatchisundaram. "Structural Vibration Control using Quantitative Feedback Theory." In 2006 IEEE International Conference on Industrial Technology. IEEE, 2006. http://dx.doi.org/10.1109/icit.2006.372510.

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Diao, Yansong, and Xianneng Tong. "Structural damage identification based on information fusion technology." In 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5988619.

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Ng, Sok Mooi, Riaz Khan, Luong Ann Lee, Biramarta Isnadi, Horng Eng Tang, and Fahima M Salleh. "A Technical Limits Weight Control Tool for Integrity Management of Aging Offshore Structures." In Offshore Technology Conference Asia. OTC, 2022. http://dx.doi.org/10.4043/31655-ms.

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Abstract This paper presents a digitized Technical Limits Weight Control (TLWC) tool for integrity management of existing fixed offshore structures. The tool is currently integrated into PETRONAS's Structural Integrity Compliance System (SICS), which is a web-based application for Structural Integrity Management (SIM) of fixed offshore structures. The main capability of the TLWC tool is to allow a user (engineer/ manager) to determine the fitness for purpose of an offshore facility quickly and efficiently for the inclusion of additional topsides loading at various locations on the platform decks. The tool makes use of global ultimate strength analyses results which considers the acceptance criteria for each operating region in Malaysian Waters. The limits of these criteria are used to create contour boundaries, which depending on Centre of Gravity (CoG) shifts due to topsides loading patterns. The tool can provide a high-level check on platform suitability for such increase in loading to cater for further development or operational needs. This quick check enables decision making at early engineering stage without the use of further elaborate and costly analyses. The contour plot shown in the results indicates the limiting acceptable Reserved Strength Ratio (RSR) for that platform. The TLWC decision-making tool is ideal for practicing offshore structural integrity engineers in operations to make a quick decision with regards to addition of topside loading for platforms with marginal reserved strength. Detailed assessment is required to address potential local member overstress for the topside structural members.

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Bronov, S. A. "Structural Control Of The Educational Program Based On Information Technology." In International Conference on Economic and Social Trends for Sustainability of Modern Society. European Publisher, 2020. http://dx.doi.org/10.15405/epsbs.2020.10.03.33.

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Sun, Huan-yu, and Li-tao Zhang. "Structural Damage Detection Based on Statistical Process Control." In 2018 IEEE 4th Information Technology and Mechatronics Engineering Conference (ITOEC). IEEE, 2018. http://dx.doi.org/10.1109/itoec.2018.8740359.

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Frampton, Kenneth D. "Decentralized Control of Structural Acoustic Radiation." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/nca-23538.

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Abstract Although the application of active control to vibrations has been investigated from many years, the extension of this technology to large-scale systems has been thwarted, in part, by an overwhelming need for computational effort, data transmission and electrical power. This need has been overwhelming in the sense that the potential applications are unable to bear the power, weight and complex communications requirement of large-scale centralized control systems. Recent developments in MEMS devices and networked embedded devices have changed the focus of such applications from centralized control architectures to decentralized ones. A decentralized control system is one that consists of many autonomous, or semi-autonomous, localized controllers called nodes, acting on a single plant, in order to achieve a global control objective. Each of these nodes has the following capabilities and assets: 1) a relatively limited computational capability including limited memory, 2) oversight of a suite of sensors and actuators and 3) a communications link (either wired or wireless) with neighboring or regional nodes. The objective of a decentralized controller is the same as for a centralized control system: to maintain some desirable global system behavior in the presences of disturbances. However, decentralized controllers do so with each node possessing only a limited amount of information on the global systems response. Exactly what information each node has access to, and how that information is used, is the topic of this investigation.

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Звіти організацій з теми "Structural control technology"

Yoozbashizadeh, Mahdi, and Forouzan Golshani. Robotic Parking Technology for Congestion Mitigation and Air Quality Control Around Park & Rides. Mineta Transportation Institute, June 2021. http://dx.doi.org/10.31979/mti.2021.1936.

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A lack or limited availability for parking may have multiple consequences, not the least of which is driver frustration, congestion, and air pollution. However, there is a greater problem that is not widely recognized by the public, namely the negative effect on the use of transit systems due to insufficient parking spaces close to key transit stations. Automated parking management systems, which have been successfully deployed in several European and Japanese cities, can manage parking needs at transit stations more effectively than other alternatives. Numerous studies have confirmed that quick and convenient automobile access to park-and-ride lots can be essential to making public transit competitive with the automobile in suburban areas. Automated parking systems use a robotic platform that carries each vehicle to one of the locations in a custom designed structure. Each location is designed compactly so that considerably more vehicles can be parked in the automated garages than the traditional parking lots. Central to the design of these systems are three key technologies, namely: 1. Mechanical design and the operation of vehicle transfer, i.e., the robotic platform 2. Structural and architectural requirements to meet safety and earthquake standards, among other design imperatives, 3. Automation and intelligent control issues as related to the overall operation and system engineering. This article concerns the first technology, and more specifically the design of the robotic platform for vehicle transfers. We will outline the overall design of the robot and the shuttle, followed by a description of the prototype that was developed in our laboratories. Subsequently, performance related issues and scalability of the current design will be analyzed.

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Sigthorsson, David O., Isaac Weintraub, and Christopher Smithson. Structural Technology Evaluation and Analysis Program (STEAP). Delivery Order 0035: Dynamics and Control and Computational Design of Flapping Wing Micro Air Vehicles. Fort Belvoir, VA: Defense Technical Information Center, October 2012. http://dx.doi.org/10.21236/ada582345.

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Mahulkar, Vishal V. Structural Technology Evaluation and Analysis Program (STEAP). Delivery Order 0037: Prognosis-Based Control Reconfiguration for an Aircraft with Faulty Actuator to Enable Performance in a Degraded State. Fort Belvoir, VA: Defense Technical Information Center, December 2010. http://dx.doi.org/10.21236/ada534168.

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Hock, Vincent F., Michael K. McInerney, Erik Kirstein, and Hannon T. Masse. Demonstration of Electro-Osmotic Pulse Technology for Groundwater Intrusion Control in Concrete Structures. Fort Belvoir, VA: Defense Technical Information Center, April 1998. http://dx.doi.org/10.21236/ada354112.

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Wang, Feng. Technical report on "BES Early Career. Control Graphene Electronic Structure for Energy Technology". Office of Scientific and Technical Information (OSTI), July 2015. http://dx.doi.org/10.2172/1192236.

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Ketner, G. L. Survey of historical incidences with Controls-Structures Interaction and recommended technology improvements needed to put hardware in space. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/6179780.

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Arora, Saurabh, Arora, Saurabh, Ajit Menon, M. Vijayabaskar, Divya Sharma, and V. Gajendran. People’s Relational Agency in Confronting Exclusion in Rural South India. Institute of Development Studies (IDS), December 2021. http://dx.doi.org/10.19088/steps.2021.004.

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Social exclusion is considered critical for understanding poverty, livelihoods, inequality and political participation in rural India. Studies show how exclusion is produced through relations of power associated with gender, caste, religion and ethnicity. Studies also document how people confront their exclusion. We use insights from these studies – alongside science and technology studies – and rely on life history narratives of ‘excluded’ people from rural Tamil Nadu, to develop a new approach to agency as constituted by two contrasting ways of relating: control and care. These ways of relating are at once social and material. They entangle humans with each other and with material worlds of nature and technology, while being mediated by structures such as social norms and cultural values. Relations of control play a central role in constituting exclusionary forms of agency. In contrast, relations of care are central to the agency of resistance against exclusion and of livelihood-building by the ‘excluded’. Relations can be transformed through agency in uncertain ways that are highly sensitive to trans-local contexts. We offer examples of policy-relevant questions that our approach can help to address for apprehending social exclusion in rural India and elsewhere.

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Zevotek, Robin, and Steve Kerber. Fire Service Summary Report: Study of the Effectiveness of Fire Service Positive Pressure Ventilation During Fire Attack in Single Family Homes Incorporating Modern Construction Practices. UL Firefighter Safety Research Institute, May 2016. http://dx.doi.org/10.54206/102376/ncck4947.

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There is a continued tragic loss of firefighter and civilian lives, as shown by fire statistics. One significant contributing factor is the lack of understanding of fire behavior in residential structures resulting from the use of ventilation as a firefighter practice on the fire ground. The changing dynamics of residential fires as a result of the changes in home construction materials, contents, size and geometry over the past 30 years compounds our lack of understanding of the effects of ventilation on fire behavior. Positive Pressure Ventilation (PPV) fans were introduced as a technology to increase firefighter safety by controlling the ventilation. However, adequate scientific data is not available for PPV to be used without increasing the risk to firefighters. This fire research report details the experimental data from cold flow experiments, fuel load characterization experiments and full scale fire experiments. During the project it was identified that the positive pressure attack (PPA) and positive pressure ventilation (PPV) were often used interchangeably. For the purpose of this report they have been defined as PPA for when the fan is utilized prior to fire control and PPV for when the fan is used post fire control. The information from the full scale tests was reviewed with assistance from our technical panel of fire service experts to develop tactical considerations for the use of PPV fans in residential single family structures.

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Zevotek, Robin, and Steve Kerber. Study of the Effectiveness of Fire Service Positive Pressure Ventilation During Fire Attack in Single Family Homes Incorporating Modern Construction Practices. UL Firefighter Safety Research Institute, May 2016. http://dx.doi.org/10.54206/102376/gsph6169.

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Mazari, Mehran, Siavash F. Aval, Siddharth M. Satani, David Corona, and Joshua Garrido. Developing Guidelines for Assessing the Effectiveness of Intelligent Compaction Technology. Mineta Transportation Institute, January 2021. http://dx.doi.org/10.31979/mti.2021.1923.

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Many factors affect pavement compaction quality, which can vary. Such variability may result in an additional number of passes required, extended working hours, higher energy consumption, and negative environmental impacts. The use of Intelligent Compaction (IC) technology during construction can improve the quality and longevity of pavement structures while reducing risk for contractors and project owners alike. This study develops guidelines for the implementation of IC in the compaction of pavement layers as well as performing a preliminary life-cycle cost analysis (LCCA) of IC technology compared to the conventional compaction approach. The environmental impacts of the improved construction process were quantified based on limited data available from the case studies. The LCCA performed in this study consisted of different scenarios in which the number of operating hours was evaluated to estimate the cost efficiency of the intelligent compaction technique during construction. The analyses showed a reduction in energy consumption and the production of greenhouse gas (GHG) emissions with the use of intelligent compaction. The LCCA showed that the use of IC technology may reduce the construction and maintenance costs in addition to enhancing the quality control and quality assurance (QC/QA) process. However, a more comprehensive analysis is required to fully quantify the benefits and establish more accurate performance indicators. A draft version of the preliminary guidelines for implementation of IC technology and long-term monitoring of the performance of pavement layers compacted thereby is also included in this report.

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