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Dissertations / Theses on the topic 'Nonlinear suspension'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Aldair, Abdulshaheed Abdulhammed. "Neurofuzzy controller based full vehicle nonlinear active suspension systems." Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/38502/.

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To design a robust controller for active suspension systems is very important for guaranteeing the riding comfort for passengers and road handling quality for a vehicle. In this thesis, the mathematical model of full vehicle nonlinear active suspension systems with hydraulic actuators is derived to take into account all the motions of the vehicle and the nonlinearity behaviours of the active suspension system and hydraulic actuators. Four robust control types are designed and the comparisons among the robustness of those controllers against different disturbance types are investigated to selec

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2

Larin, Oleksiy O., Oleksii O. Vodka, Ruslan O. Kaidalov, and Volodymyr M. Bashtovoi. "Stochastic Dynamics of the Specialized Vehicle with Nonlinear Suspension." Thesis, NTU "KhPI", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/23647.

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This work deals with the theoretical modelling of the vertical dynamics of the vehicle which has an additional level of suspension for a cargo platform with the nonlinear stiffness. The paper presents the design scheme of the additional level of cushioning having a quasi-zero stiffness in the equilibrium position. The mathematical model of the dynamic behavior of specialized vehicles is developed as a nonlinear discrete system. The results of numeric calculations of the vehicle dynamic response on the stochastic load is represented based on the developed model. Vertical vibrations of the cargo

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3

Marsh, Clive. "A nonlinear control design methodology for computer-controlled vehicle suspension systems." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/27995.

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This study demonstrates a new nonlinear controller design methodology applicable to automotive suspension systems. It enhances the ability of the designer to tackle the complex design problem of a controller for a computer-controlled suspension. Based on the principles of optimal control, it permits the use of more general system models and cost functions than the standard linear optimal design techniques and hence, increases the freedom of the designer. It implements the control with an optimal, nonlinear feedback law and is shown to have the potential to improve vehicle performance.

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4

Olson, Sean Michael. "Nonlinear compensation of a single degree of freedom magnetic suspension system." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12067.

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5

Mansour, Kamjou. "Characterizations of optical nonlinearities in carbon black suspension in liquids." Thesis, University of North Texas, 1990. https://digital.library.unt.edu/ark:/67531/metadc332586/.

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A complete study was conducted on optical limiting characterization in samples of carbon black microparticles in a mixture of deionized water and ethylene glyccol using nanosecodn and picosecond later pulses at 532 nm and 1064 nm.

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6

Viarbitskaya, Sviatlana. "Resonance-enhanced Second Harmonic Generation from spherical microparticles in aqueous suspension." Doctoral thesis, Stockholm University, AlbaNova University Center (together with KTH), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7517.

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<p>Second harmonic generation (SHG) is a nonlinear optical effect sensitive to interfaces between materials with inversion symmetry. It is used as an effective tool for detection of the adsorption of a substance to microscopic particles, cells, liposomes, emulsions and similar structures, surface analysis and characterization of microparticles. The scattered second harmonic (SH) intensity from surfaces of suspended microparticles is characterized by its complex angular distribution dependence on the shape, size, and physical and chemical properties of the molecules making up the outer layer of

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7

Kwong, Gordon Houng. "Approximations for Nonlinear Differential Algebraic Equations to Increase Real-time Simulation Efficiency." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/42753.

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Full-motion driving simulators require efficient real-time high fidelity vehicle models in order to provide a more realistic vehicle response. Typically, multi-body models are used to represent the vehicle dynamics, but these have the unfortunate drawback of requiring the solution of a set of coupled differential algebraic equations (DAE). DAE's are not conducive to real-time implementation such as in a driving simulator, without a very expensive processing capability. The primary objective of this thesis is to show that multi-body models constructed from DAE's can be reasonably approximate

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8

Brown, R. D. "The effect of the nonlinear rear suspension on the traction of off-road motorcycles." Thesis, Cranfield University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396506.

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9

Mohan, Anant. "Nonlinear Investigation of the Use of Controllable Primary Suspensions to Improve Hunting in Railway Vehicles." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33740.

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Hunting is a very common instability exhibited by rail vehicles operating at high speeds. The hunting phenomenon is a self excited lateral oscillation that is produced by the forward speed of the vehicle and the wheel-rail interactive forces that result from the conicity of the wheel-rail contours and the friction-creep characteristics of the wheel-rail contact geometry. Hunting can lead to severe ride discomfort and eventual physical damage to wheels and rails. A comprehensive study of the lateral stability of a single wheelset, a single truck, and the complete rail vehicle has been performe

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10

Lebel, David. "Statistical inverse problem in nonlinear high-speed train dynamics." Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC2189/document.

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Ce travail de thèse traite du développement d'une méthode de télédiagnostique de l'état de santé des suspensions des trains à grande vitesse à partir de mesures de la réponse dynamique du train en circulation par des accéléromètres embarqués. Un train en circulation est un système dynamique dont l'excitation provient des irrégularités de la géométrie de la voie ferrée. Ses éléments de suspension jouent un rôle fondamental de sécurité et de confort. La réponse dynamique du train étant dépendante des caractéristiques mécaniques des éléments de suspension, il est possible d'obtenir en inverse des

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11

Tusset, Ângelo Marcelo. "Controle ótimo aplicado em modelo de suspensão veicular não-linear controlada através de amortecedor magneto-reológico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15395.

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Este trabalho apresenta uma proposta para o controle da suspensão veicular utilizando o amortecedor magneto-reológico, sendo o controle proposto composto pela associação de duas estratégias de controle, o controle ótimo e o controle fuzzy. O Controle ótimo é utilizado para determinar a força a ser utilizada pelo amortecedor magneto-reológico, e o controle fuzzy é utilizado para determinar a corrente elétrica, a ser utilizada no amortecedor magento-reológico e é obtido considerando o modelo de Mandani. Para o controle fuzzy, são consideradas duas entradas, a velocidade de deslocamento do pistão

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12

Murali, madhavan rathai Karthik. "Synthesis and real-time implementation of parameterized NMPC schemes for automotive semi-active suspension systems." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT052.

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Cette thèse traite de la synthèse et de la mise en œuvre en temps réel (RT) de schémas de contrôle prédictif non linéaire paramétré (pNMPC) pour les systèmes de suspension semi-active des automobiles. Le schéma pNMPC est basé sur une technique d'optimisation par simulation en boîte noire. Le point essentiel de la méthode est de paramétrer finement le profil d'entrée et de simuler le système pour chaque entrée paramétrée et d'obtenir la valeur approximative de l'objectif et de la violation des contraintes pour le problème pNMPC. Avec les résultats obtenus de la simulation, l'entrée admissible (

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13

Song, Xubin. "Design of Adaptive Vibration Control Systems with Applicaion to Magneto-Rheological Dampers." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/29556.

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The design of nonlinear adaptive control systems for reducing vibration transmission in applications such as transportation systems is discussed. The systems studied include suspension systems, such as those used in vehicles, employing nonlinear magneto-rheological (MR) dampers that are controlled to provide improved vibration isolation. Magneto-rheological dampers use a novel class of smart fluid whose apparent viscosity changes as it is exposed to a magnetic field. The developed adaptive control scheme is designed to deal with the nonlinearities and uncertainties that commonly arise in mo

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14

Thylén, Christian. "Förenklad numerisk analys av hängbroars verkningssätt : Utveckling av programmet SusB med tillämpning av CalFEM toolbox." Thesis, KTH, Bro- och stålbyggnad, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36952.

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15

Oliveira, Fernando Emerenciano Nunes de. "Controles semiativos e observador de estados não linear aplicados em suspensão veicular com amortecedor magneto-reológico." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2904.

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Comprovadamente, o sistema de suspensão veicular passivo é uma proposta confiável e econômica de solução tanto para redução dos níveis de vibração do chassi e da roda, quanto para a redução dos níveis de aceleração do chassi. Embora este sistema seja amplamente empregado nos veículos, ele apresenta a desvantagem que seus parâmetros não podem ser modificados de acordo com as variações geradas pela pista. Com isso surge o emprego da utilização do sistema de suspensão ativa, que possibilita a variação dos parâmetros da suspensão a tempo real, no entanto, o emprego deste tipo de suspensão requer u

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16

El-Ganainy, Ramy. "Optical Nonlinear Interactions In Dielectric Nano-Suspensions." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4122.

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This work is divided into two main parts. In the first part (chapters 2-7) we consider the nonlinear response of nano-particle colloidal systems. Starting from the Nernst-Planck and Smoluchowski equations, we demonstrate that in these arrangements the underlying nonlinearities as well as the nonlinear Rayleigh losses depend exponentially on optical intensity. Two different nonlinear regimes are identified depending on the refractive index contrast of the nanoparticles involved and the interesting prospect of self-induced transparency is demonstrated. Soliton stability is systematically analyze

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17

Maillou, Balbine. "Caractérisation et identification non-paramétrique des non-linéarités de suspensions de haut-parleurs." Thesis, Le Mans, 2015. http://www.theses.fr/2015LEMA1028.

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Ce travail de thèse porte sur le comportement mécanique en basses fréquences de l'équipage mobile du haut-parleur électrodynamique, et plus spécifiquement de ses suspensions. Les propriétés des suspensions sont difficiles à identifier du fait de l'assemblage géométrique mis en oeuvre et du fait des matériaux employés, à l'origine de comportements viscoélastiques non-linéaires. En régime linéaire, le modèle de Thiele et Small permet une bonne description du comportement du haut-parleur, l'équipage mobile étant modélisé par un système masse-ressort-amortissement linéaire. En régime non-linéaire,

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18

Zargar, Bahram. "Model development, validation and nonlinear control of pneumatic suspensions." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27499.

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Pneumatic suspensions are widely used at present in the truck industry. The passive controllability of the parameters of these suspensions makes them suitable for load adapted suspensions. However, active control of these systems is challenging because of their parameter uncertainties and their highly nonlinear behavior. The ultimate goal of this research is to develop an active pneumatic suspension system to improve the ride comfort and performance of car suspensions. For this purpose, dimensional analysis was applied to the half car model of the Honda Civic. The conventional suspension of th

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19

Harrer, Christian Josef [Verfasser]. "Active and Nonlinear Microrheology of Dense Colloidal Suspensions / Christian Josef Harrer." Konstanz : Bibliothek der Universität Konstanz, 2013. http://d-nb.info/1041224648/34.

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20

Bongono, Juilien. "Caracterisation des suspensions par des methodes optiques. modelisation par reseaux de neurones." Thesis, Saint-Etienne, EMSE, 2010. http://www.theses.fr/2010EMSE0577/document.

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La sédimentation des suspensions aqueuses de particules minérales microniques, polydisperses et concentrées a été analysée à l’aide du Turbiscan MA 2000 fondé sur la diffusion multiple de la lumière, en vue d’établir la procédure qui permet de déceler la présence d’une morphologie fractale, puis de déduire les règles de comportements des suspensions fractales par la modélisation avec les réseaux de neurones. Le domaine des interactions interparticulaires physicochimiques (0 à 10% volumique en solide) a été privilégié.La méthodologie de détermination de la structure multifractale des agglomérat

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21

Knotek, Jan. "Lávka pro pěší podporovaná kabely." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392119.

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The subject of this diploma thesis is design a cable-supported pedestrian bridge. Three different variants of the solution were created for the design. For detailed processing, variant no.2 was chosen - a suspended bridge with a pylon in the middle of the span. The main task is the static design of the supporting structure. The model for the lengthways is created in ANSYS. The SCIA engineer was used to solve crosswise. The assessment and dimensioning was done according to the limit state principles and valid standards.

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22

Svahn, Fredrik. "Low-cost control of discontinuous systems including impacts and friction." Licentiate thesis, Stockholm : Farkost och flyg, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4581.

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23

Swatzel, James Paul. "A partial differential equation to model the Tacoma Narrows Bridge failure." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2631.

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The purpose of this thesis was to examine a partial differential equation to model the Tacoma Narrows bridge failure. This thesis will examine the equation developed by Lazer and McKenna to model a suspension bridge in no wind.

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Tomisová, Gabriela. "Předpjatý pás přes hluboké údolí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265226.

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The topic of this thesis is a design of stress ribbon bridge across the deep valley. The construction of the footbridge contains stress ribbon bridge with external cables and final prestressing tendons. The bridge deck is in a parabolic arc and the suspension cables are in two bend down parabolic arcs. The construction is reproduced for evaluation of longitudinal direction in the Ansys 14.0 programme and for transversal direction in the Scia Engineer 15.1 programme. The model was solved in several phases, nonlinerally. The pier was reproduced in the Scia Engineer 15.1 programme for local effec

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Fernandes, Julio Cesar de Moraes [UNESP]. "Influência das não linearidades geométricas em sistemas de suspensão com amortecimento assimétrico sob excitação harmônica." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/132496.

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Made available in DSpace on 2016-01-13T13:26:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-07-24. Added 1 bitstream(s) on 2016-01-13T13:32:11Z : No. of bitstreams: 1 000852137.pdf: 2643913 bytes, checksum: 095f34948be7c9f12b30f5dac4abbc41 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O objetivo deste trabalho é estudar o comportamento dinâmico de sistemas de suspensão veicular que empregam amortecimento viscoso assimétrico, com foco na melhoria do conforto para os passageiros, considerando não linearidade geométricas presentes no sistema. Estudos

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Fernandes, Julio Cesar de Moraes. "Influência das não linearidades geométricas em sistemas de suspensão com amortecimento assimétrico sob excitação harmônica /." Bauru, 2015. http://hdl.handle.net/11449/132496.

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Orientador: Marcos Silveira<br>Banca: Paulo José Paupitz Gonçalves<br>Banca: Samuel da Silva<br>Resumo: O objetivo deste trabalho é estudar o comportamento dinâmico de sistemas de suspensão veicular que empregam amortecimento viscoso assimétrico, com foco na melhoria do conforto para os passageiros, considerando não linearidade geométricas presentes no sistema. Estudos anteriores comprovam que o uso de amortecedores assimétricos nestes tipos de sistema pode ser vantajoso com relação ao conforto dos passageiros. Porém, nota-se que há uma deficiência no entendimento do comportamento dinâmico des

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Pelikán, Adam. "Střecha plaveckého stadionu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226932.

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This diploma thesis is about designing the structure of roof of swimming stadium. Three solutions are created - concrete arc with tie, steel truss slab and concrete pretensioned membrane. One choosed solution - concrete pretensioned membrane - is afterwards developed. In the beginning there are several designs of geometry fulfilling the requirements for given type of structure being created. In part of static calculation, the parametrical mathematical model in form of macro in APDL language for Ansys software has been created. Afterwards all the parameters (initial state of cables, level of pr

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Mazotti, Adriano César [UNESP]. "Comportamento dinâmico de suspensão eletromecânica: análise da resposta devido ao amortecimento e à rigidez não linear." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115918.

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Made available in DSpace on 2015-03-03T11:52:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-05-06Bitstream added on 2015-03-03T12:07:10Z : No. of bitstreams: 1 000800685.pdf: 1492848 bytes, checksum: 66d029b83fe3516cc9b217657df61d80 (MD5)<br>Este trabalho explora os diferentes tipos de comportamento dinâmicos, encontrados em sistemas eletromecânicos linear e não-linear análogos, sendo o sistema eletromecânico não-linear constituído de rigidez tipo Duffing. A modelagem matemática dos sistemas físicos hipotéticos é realizada através de técnicas Langrangeanas, inclusive para a modela

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Mazotti, Adriano César. "Comportamento dinâmico de suspensão eletromecânica : análise da resposta devido ao amortecimento e à rigidez não linear /." Bauru, 2014. http://hdl.handle.net/11449/115918.

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Orientador: Bento Rodrigues de Pontes Junior<br>Co-orientador: Marcos Silveira<br>Banca: Marcio Antonio Bazani<br>Banca: Paulo José Paupitz Gonçalves<br>Resumo: Este trabalho explora os diferentes tipos de comportamento dinâmicos, encontrados em sistemas eletromecânicos linear e não-linear análogos, sendo o sistema eletromecânico não-linear constituído de rigidez tipo Duffing. A modelagem matemática dos sistemas físicos hipotéticos é realizada através de técnicas Langrangeanas, inclusive para a modelagem que aborda componentes eletromagnéticos de um circuito RLC. O transdutor utilizado no acop

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30

Madeira, Fabiano Gomes [UNESP]. "Análise dinâmica de mecanismo articulado de suspensão com não-linearidade na rigidez devido à geometria e à excitação por desbalanceamento rotativo na condição não ideal." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115917.

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Made available in DSpace on 2015-03-03T11:52:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-05-16Bitstream added on 2015-03-03T12:07:10Z : No. of bitstreams: 1 000800632.pdf: 2649005 bytes, checksum: 0e6f6ee2cc449b2d9d89392080c49c79 (MD5)<br>Essa dissertação trata da dinâmica de um sistema com não-linearidade na rigidez devido à geometria do mecanismo articulado de duas barras, identificado como NLGS ao longo do texto. Na Introdução do trabalho são mostrados exemplos de sistema com rigidez não-linear devido á geometria, destacando a aplicação desse tipo de sistema como isolador de

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Madeira, Fabiano Gomes. "Análise dinâmica de mecanismo articulado de suspensão com não-linearidade na rigidez devido à geometria e à excitação por desbalanceamento rotativo na condição não ideal /." Bauru, 2014. http://hdl.handle.net/11449/115917.

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Orientador: Bento Rodrigues de Pontes Junior<br>Banca: Marcio Antonio Bazani<br>Banca: Marcos Silveira<br>Resumo: Essa dissertação trata da dinâmica de um sistema com não-linearidade na rigidez devido à geometria do mecanismo articulado de duas barras, identificado como NLGS ao longo do texto. Na Introdução do trabalho são mostrados exemplos de sistema com rigidez não-linear devido á geometria, destacando a aplicação desse tipo de sistema como isolador de vibração e também discute-se sobre a exposição humana à vibração como motivação e justificativa para o trabalho, ressaltando-se as frequênci

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Motta, Daniel da Silva. "Modelagem de uma suspensão veicular com elementos não lineares e comparação de seu desempenho com um modelo semi-ativo." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263860.

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Orientador: Douglas Eduardo Zampieri<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-05T06:44:34Z (GMT). No. of bitstreams: 1 Motta_DanieldaSilva_M.pdf: 1219534 bytes, checksum: 63a8c2a0d7734b3fc5ba39e3e5386e99 (MD5) Previous issue date: 2005<br>Resumo: Este trabalho analisa e compara sistemas semi-ativos de controle de suspensões veiculares com um sistema passivo não-linear. O modelo matemático do sistema de suspensão, detalhado nesta dissertação, tem sete graus de liberdade, de modo a representar um veíc

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Jerrelind, Jenny. "Design and Control of Products Including Parts with Impacts." Doctoral thesis, KTH, Farkost- och flygteknik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3734.

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Today's product development process should be rapid andcost-efficient, and should result in innovative and reliableproducts. A crucial factor is the dynamic behaviour of theproduct. This thesis focuses on theoretical, numerical andexperimental approaches to achieve a comprehensiveunderstanding of dynamical phenomena occurring in nonlinearproducts, especially in products with parts that includeimpacts. The aim is to show the usefulness of nonlineartheories to better understand and optimise the dynamicbehaviour of products and thereby account for nonlinearphenomena already in the product develop

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Barillon, Franck. "Méthodologies de couplage fort des systèmes dynamiques : approches linéaires et non-linéaires." Thesis, Ecully, Ecole centrale de Lyon, 2011. http://www.theses.fr/2011ECDL0012/document.

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Dans cette thèse, nous nous sommes intéressés au comportement vibratoire d’un véhicule soumis à une excitation moteur dans deux plages de régimes différentes : basses fréquences (0 – 50 Hz) et moyennes fréquences (200 – 800 Hz). Le but était de fournir des méthodologies numériques permettant de prendre en compte les phénomènes de couplage vibratoires existant entre les différents sous-systèmes constitutifs d’une caisse automobile.En basses fréquences, nous avons adopté une approche globale où chaque sous-système a été caractérisé séparément. Tout d’abord, le comportement de la caisse a été car

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Huang, Chao-Ming, and 黃兆銘. "Nonlinear Controller Design of Repulsive Maglev Suspension Guiding System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/97131423013391887515.

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博士<br>國立臺灣大學<br>機械工程學研究所<br>87<br>The most popular approach to achieve ultra-high precision positioning is to use compound actuators. The compound actuators generally include flexure type actuators to achieve very fine positioning resolution, and ball-screws to cover the large travels. These compound actuator configurations have dominated the equipment market in recent years; however, these configurations are still associated with some problems. First of all, the flexure mechanisms driven by piezo-electric actuators are usually highly oscillatory. Secondly, the different actuator resolutions m

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Chou, Tzu Ming, and 周子明. "A Nonlinear Control for Two-dimensional Magnetic Suspension System." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/30784535871437919830.

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碩士<br>國立清華大學<br>動力機械學系<br>84<br>This paper presents a practical design and implementation method of multivariable sliding mode control for magnetic suspension system represented by a nonlinear dynamic model. On the basis of the Lyapunov function approach,the proposed design method ensure the existence of a control law to satisfy the sliding mode con- dition. The designed controller was successfully implemented in an experimental magnetic suspension system. Experimental results showed tha

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陳祈銘. "Nonlinear and Adaptive Fuzzy Control for Active Suspension Systems." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/96685958682727585076.

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碩士<br>國立中興大學<br>機械工程學系<br>87<br>An active suspension system is inherently nonlinear due to the nonlinear electrohydraulic actuator dynamics. In this thesis, we propose a fuzzy auto-tuning PD control and an adaptive fuzzy sliding mode control for active suspension systems, and compare their performance with backstepping control proposed by Lin and Kanellakopoulos[11]. The Taguchi method is used for the optimal selection of the controller parameters. The fuzzy auto-tuning PD controller is composed of a PD control with gains auto-tuned using a fuzzy system and nonlinear controls based

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Ru, Lee Chang, and 李承儒. "Nonlinear Dynamic Analysis of Suspension Bridge by the VFIFE Method." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/hxs34a.

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碩士<br>國立中央大學<br>土木工程學系<br>103<br>This paper studies the dynamic response of the Suspension bridge after the earthquake force. Suspension bridge is Flexible structure. Determining the security status of suspension by force after the destruction failure. And using VFIFE to analyze the dynamic response. In this case, Bitan Suspension bridge is used. By using data of temperature and human being to build the model. And apply external forces into model to determining structure failure.

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Chen, Ying-Zuo, and 陳盈佐. "Development of a Magnetic Suspension System with Nonlinear Control Approach." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/49340542893041534753.

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碩士<br>國立東華大學<br>電機工程學系<br>98<br>Magnetic suspension systems are highly nonlinear and essentially unstable systems. In the current drive, according to the equivalent circuit scheme of electromagnet, a feedback circuit is proposed to improve the transient response and relative stability of the current drive. First, in the proposed controller, the feedback linearization technique is used to transform the dynamic model of the magnetic suspension system to linear model. Then, according to the linearization dynamics a sliding-mode controller based on the linear model is designed, and the stability o

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Hsieh, I.-Che, and 謝易哲. "The Internal Resonance Analysis of A Nonlinear Suspension Elastic Beam." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/17136422008815509868.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>99<br>The internal resonance (I.R.) of a Bernoulli-Euler Beam with nonlinear suspensions (cubic nonlinear springs) and with different end supports was studied in this thesis. The Bernoulli-Euler Beam is suspended by nonlinear springs (similar to Winkler Type Foundation) to the top ceiling. Four different types of boundary conditions are considered in the study, which are hinged-hinged, hinged-roller support, fixed-fixed, and spring-spring support, respectively. A simple Aerodynamic loading is included to simulate this suspension bridge vibration system. This resear

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ARENA, ANDREA. "Aeroelasticity of suspension bridges using nonlinear aerodynamics and geometrically exact structural models." Doctoral thesis, 2012. http://hdl.handle.net/11573/656422.

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Le vibrazioni indotte dall’azione del vento su ponti sospesi di grandissima luce rappresentano uno dei maggiori problemi per i progettisti di tali opere. Vi `e pertanto la necessit`a di migliorare le attuali tecnologie progettuali, facendo uso delle pi`u avanzate tecniche computazionali, poich`e ci`o `e essenziale per una migliore comprensione della fluido dinamica che governa il problema e che `e la causa dell’accopiamento fluido-strutturale in ponti cos`ı flessibili e dunque delle vibrazioni che ne conseguono. La progettazione di ponti aventi luci significativamente pi`u lunghe di quell

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Barni, N. "Nonlinear buffeting response of suspension bridges considering time-variant self-excited forces." Doctoral thesis, 2022. http://hdl.handle.net/2158/1278784.

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In the last thirty years, the aerodynamic nonlinearities related to the slow variation of the angle of attack produced by large-scale atmospheric turbulence and their impact on the buffeting response of long-span suspension bridges have been a hot topic in wind engineering research. Self-excited forces accounting for such an effect of turbulence have been crucial in predicting the dynamic response of bridge sectional models and long-span suspension bridges subjected to multi-harmonic gusts and the turbulent wind, respectively. Despite several nonlinear aerodynamic models produced by the scient

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ARENA, ANDREA. "Aerolasticity of suspension bridges using nonlinear aerodynamics and geometrically exact structural models." Doctoral thesis, 2012. http://hdl.handle.net/11573/916709.

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Wind-induced vibration in super-long-span bridges is a major concern for the designers. There is a need to enhance the structural design technology, through improved computational capabilities, a critical step for a better understanding of fluid-flow physics that induce vibration and fluid- structure dynamics of flexible bridges. The design of bridges with spans significantly longer than those existing today is quite challenging. To refine the computational tools required for such bridges, a multi- disciplinary research effort devoted to the advanced modeling of flexible long-span suspension b

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Joarder, Mahmud Niroopam. "Influence of nonlinear asymmetric suspension properties on the ride characteristics of road vehicle." Thesis, 2003. http://spectrum.library.concordia.ca/1935/1/MQ77979.pdf.

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The suspension springs and dampers, employed in road vehicles, typically exhibit nonlinear and asymmetric force-deflection and force-velocity characteristics. The asymmetric characteristics of the suspension components are characterized to investigate the phenomenon of drift in dynamic equilibrium, also known as the 'ride height drift'. A quarter-vehicle model, incorporating nonlinear and asymmetric suspension components, is mathematically modeled and simulated using 'simulink'. Suspension damper is represented by multistage nonlinear asymmetric characteristics, while the stiffness is treated

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游本呈. "The Effect of Nonlinear Suspension on the Dynamic Performance of Automatic Ball Balancer." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/93796227309926226104.

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Chang, Ji-Jing, and 張繼靖. "Dynamic Analyses of Vehicles with Nonlinear Secondary Suspension Damping Running on Tracks with Irregularity." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/05628114688004322083.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>93<br>This thesis studies the vertical and lateral dynamic behavior of a vehicle running on a slab track with vertical and lateral irregularities. In this work, both the carbody and rails are assumed as Euler beams, and the carbody is equipped with nonlinear lateral dampers. First, the discretized eqations of motion of the elastic carbody and rails are formulated by the finite element method, and the equations of motion of bogies and wheelsets are derived by Newton’s second law. Then, these equations are assembled to yield the equations of motion for the vehicle and

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Zhang, Hao. "Suspension-Colloidal Transport in Porous Media: Basic Equations, Analytical Model and Nonlinear Physics Effects." Thesis, 2018. http://hdl.handle.net/2440/120351.

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Hereby I present a Master of philosophy thesis by publications. The thesis includes two peer-reviewed journal papers. One has been published in International Journal of Non-linear Mechanics. The other has been submitted to Transport in Porous Media and is currently under review. Flow of colloidal-suspensions and nanofluids in porous media is encountered in numerous processes of the natural subsurface environment and industrial relevant fields. The physical and chemical mechanisms of particle transport and subsequent retention are of great significance in study of current filtration theory. Thi

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Chang, Chia-Man, and 張家嫚. "The Study of A Nonlinear Suspension Elastic Beam with An End Point Dynamic Vibration Absorber." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/71955259940263791315.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>101<br>This study investigated the performance of a mass-spring dynamic vibration absorber (DVA) at the free end of a hinged-free elastic beam under simple harmonic excitation. This beam system was suspended by suspension cables. These cables were simulated by cubic nonlinear springs to examine the nonlinear characteristics of this system. The combination of mass and spring constant of the tip-attached dynamic vibration absorber (DVA) were investigated. This time-dependent non-homogeneous boundary condition problem was solved by Mindlin-Goodman method. By using the

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Zambare, Hrishikesh B. "Nonlinear design, modeling and simulation of magneto rheological suspension: a control system and systems engineering approach." Thesis, 2017. https://doi.org/10.7912/C2GW8S.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Suspension has been the most important subsystem of the vehicle viewed as a system. The ride comfort and vehicle handling performance are affected by the suspension design. Automotive technology has been continuously incorporating developments over the past few decades to provide the end users with a better comfort of driving. Multi-objective optimization of MR damper with objective function of maximizing damping force generated by MR damper with the geometrical parametric constraint function is achieved in this research using patter

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Bau, Guo Fang, and 郭芳寶. "Vehicle Carried Suspension Bridge Construction Stage Nonlinear Analysis – Taking Swing Column Bridge Tower as an Example." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/wcgdsy.

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碩士<br>國立高雄應用科技大學<br>土木工程與防災科技研究所<br>101<br>The purpose of this paper is to perform nonlinear analysis on Swing column vehicle carried suspension bridges during construction stage. Researches were focused on suspension bridges which had rotating shafts supported design at bottom of bridge tower that it bears purely axis, shear forces, and reducing bending stresses. Study was on nonlinear analyzing on Swing column vehicle carried suspension bridge during construction stage.Research methods were, after confirmation of geometrical shapes and initial states of suspension bridges, built up analysi

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