Дисертації з теми "Rigid flexible multibody- Dynamics"
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Yi, Tong Yong 1955. "Structural Identification Based on Vibration Data for Flexible and Rigid Multibody System Dynamics." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/565568.
Повний текст джерелаYamashita, Hiroki. "Flexible multibody dynamics approach for tire dynamics simulation." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/2297.
Повний текст джерелаPalomba, Ilaria. "State estimation in multibody systems with rigid or flexible links." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3427127.
Повний текст джерелаNello studio e nella progettazione di meccanismi e manipolatori (comunemente detti sistemi multibody MB) la sintesi di stimatori dello stato diviene un requisito indispensabile in molteplici applicazioni avanzate, quali ad esempio la fault detection, l'identicazione dei parametri, la sintesi di controllori, o il controllo attivo delle vibrazioni. Gli stimatori dello stato sono progettati per ottenere delle accurate stime di variabili non misurabili o non misurate. Le prestazioni di uno stimatore dipendono tanto dalla scelta di un opportuno algoritmo di stima, che deve essere capace di fronteggiare le nonlinearità dei sistemi MB, quanto dalla modellazione adottata per i sistemi stessi. In particolare, quest'ultima deve essere adatta al processo di stima, nel senso che deve fornire una descrizione accurata del sistema fisico ma al contempo essere efficiente computazionalmente. Al fine di ottimizzare le prestazioni degli stimatori sono stati sviluppati degli approcci di stima diversicati per i sistemi MB a membri rigidi ed a membri flessibili. In riferimento ai sistemi MB a membri rigidi è stato sviluppato un approccio di stima che rafforza significativamente il ruolo delle equazioni di chiusura cinematiche. Infatti esse, rispetto ai modelli dinamici sino ad ora ampiamente utilizzati, presentano alcuni vantaggi tra cui la minore complessità ed incertezza. Questo nuovo approccio permette non solo di ottenere stime dello stato più accurate ma anche di affrontare con successo il problema della stima delle forze incognite attraverso una formulazione del tutto innovativa, chiamata approccio a due stadi ("two-stage approach"). Per quanto concerne la modellazione dei sistemi MB a membri flessibili, essa presenta criticità alquanto diverse dal precedente ambito di indagine, tra cui la difficoltà di disaccoppiare l'analisi cinematica da quella dinamica, che impedisce l'adozione di un approccio cinematico per la stima delle variabili di stato, e le elevate dimensioni dei modelli che usualmente non permettono la sintesi di stimatori computazionalmente efficienti. Tali criticità hanno imposto preliminarmente lo sviluppo di una nuova strategia per la riduzione dei modelli dinamici non lineari configurazione-varianti dei sistemi MB a membri flessibili. Questa nuova strategia di riduzione permette di ottenere dei modelli dinamici di dimensioni significativamente ridotte, ma ugualmente capaci di descrivere accuratamente la dinamica dei sistemi MB a membri flessibili in un intervallo di frequenze d'interesse. La disponibilità di tali modelli ridotti ha reso possibile la successiva implementazione di più efficienti stimatori dello stato anche nonlineari. Nel presente lavoro di tesi sono inoltre raccolti i numerosi risultati derivanti da test sia numerici che sperimentali condotti per dimostrare la validità degli sviluppi teorici discussi.
Stemple, Timothy J. "Dynamics and Control of Flexible Multibody Structures." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30407.
Повний текст джерелаPh. D.
Mantikas, Nikolaos. "Dynamics of large flexible multibody structures in space." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396146.
Повний текст джерелаChen, Jiunn-Liang. "Dynamics and control of structurally flexible multibody systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=case1056383298.
Повний текст джерелаPark, Jungho 1958. "Uncoupling of rigid-flexible multibody equations of motion using node annexation method." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282519.
Повний текст джерелаRodriguez, Jesus. "Modeling of complex systems using nonlinear, flexible multibody dynamics." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/12344.
Повний текст джерелаLeyendecker, Sigrid. "Mechanical integrators for constrained dynamical systems in flexible multibody dynamics." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980411912.
Повний текст джерелаRoberts, David Thomas. "Assessment of finite element approximations for nonlinear flexible multibody dynamics." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/42506.
Повний текст джерелаMoore, Brian M. "Flexible multibody dynamics and control of the bifocal relay mirror." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FMoore.pdf.
Повний текст джерелаThesis advisor(s): Brij N. Agrawal, Marcello Romano. Includes bibliographical references (p. 59). Also available online.
Choi, Jou-Young. "Flexible multibody analysis of thin structures with actuated components." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/12532.
Повний текст джерелаTuzun, Aydin. "Large Deformation Analysis Of Flexible Multibody Systems." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614821/index.pdf.
Повний текст джерелаANCF with Virtual Element Mapping Method&rdquo
has been proposed to overcome the boundary problems of the current formulations. The proposed method has been implemented to plane stress, plane strain, plate/shell and 3D solid finite elements. Verification of the proposed method has been performed by using the patch test problems available in the literature. Besides, it has been verified by various flexible multibody problems with large deformations. Additionally, shape function polynomials for thin plate assumption have been derived. It is observed that developed formulations and methods can be useful not only for flexible multibody systems but also for structural mechanics problems subjected to large deformations and/or rotations. The proposed methods and formulations are more efficient than the current formulations in the literature due to extended shape limits of finite elements.
Ibrahim, Ahmed El-Hady M. "Mathematical modelling of flexible multibody dynamics with application to orbiting systems." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28840.
Повний текст джерелаApplied Science, Faculty of
Mechanical Engineering, Department of
Graduate
Jayasuriya, Arachige Tilak A. "Dynamics of unbalanced rotors on rigid and flexible bearings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0016/MQ48062.pdf.
Повний текст джерелаGoyal, Anmol [Verfasser], and Bernd [Akademischer Betreuer] Simeon. "Isogeometric Shell Discretizations for Flexible Multibody Dynamics / Anmol Goyal. Betreuer: Bernd Simeon." Kaiserslautern : Technische Universität Kaiserslautern, 2015. http://d-nb.info/107154747X/34.
Повний текст джерелаShi, Pengfei. "Flexible multibody dynamics, a new approach using virtual work and graph theory." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0008/NQ32856.pdf.
Повний текст джерелаMin, Byung No. "Object-oriented modeling for the dynamics of tree-topological flexible multibody systems." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19569.
Повний текст джерелаSänger, Nicolas [Verfasser]. "Elemente für die Dynamik flexibler Mehrkörpersysteme. Elements for flexible multibody dynamics / Nicolas Sänger." Siegen : Universitätsbibliothek Siegen, 2011. http://d-nb.info/1017180997/34.
Повний текст джерелаMoghadasi, Ali [Verfasser], and Robert [Akademischer Betreuer] Seifried. "Contributions to topology optimization in flexible multibody dynamics / Ali Moghadasi ; Betreuer: Robert Seifried." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2019. http://d-nb.info/1190723743/34.
Повний текст джерелаRicci, Stefano <1982>. "Model reduction techniques in flexible multibody dynamics with application to engine cranktrain simulation." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5882/1/ricci_stefano_tesi.pdf.
Повний текст джерелаRicci, Stefano <1982>. "Model reduction techniques in flexible multibody dynamics with application to engine cranktrain simulation." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5882/.
Повний текст джерелаRibaric, Adrijan Petar. "Orientation Invariant Characteristics of Deformable Bodies in Multibody Dynamics." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238644.
Повний текст джерелаDas, Manabendra. "Aeroelastic Analysis of Rotor Blades Using Three Dimensional Flexible Multibody Dynamic Analysis." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195601.
Повний текст джерелаLiu, Chih-Hsing. "A finite element based dynamic modeling method for design analysis of flexible multibody systems." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/39605.
Повний текст джерелаParsa, Kourosh. "Dynamics, state estimation, and control of manipulators with rigid and flexible subsystems." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83089.
Повний текст джерелаThe mathematical models of the flexible and the rigid submanipulators are derived separately, each through the premultiplication of the transpose of the kinematic-constraint matrix by the assembled set of the link Lagrange equations; this matrix is the natural orthogonal complement of the kinematic-constraint wrench. Obviously, the reaction wrench acting between the rigid-robot base and the end-effector of the flexible submanipulator couples the two sets of dynamics equations. This wrench can be determined by substituting the twist-rate of the base, i.e., its angular and translational accelerations, into the dynamics equations of the rigid submanipulator and, subsequently, solving them. Then, considering the wrench as a time-dependent input for the flexible arm, we take the flexible-arm dynamics as the modelled dynamics in the observer. The reduced-order dynamics helps dramatically reduce the required floating-point operations within the observer.
Two redundancy-resolution techniques, namely, rigid-link redundancy resolution and flexible-link redundancy resolution, are discussed. Whereas the former assumes all the links to be rigid, the latter takes the flexibility effects into account. In both approaches, the self-motion of the system is computed so as to minimize the forces exciting its lowest "modal coordinates" while imposing a proportional damping on the flexural dynamics.
Moberg, Stig. "Modeling and Control of Flexible Manipulators." Doctoral thesis, Linköpings universitet, Reglerteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-60831.
Повний текст джерелаSchmitt, Alexander Georg [Verfasser], and Robert [Akademischer Betreuer] Seifried. "Real-time simulation of flexible multibody systems in vehicle dynamics / Alexander Georg Schmitt ; Betreuer: Robert Seifried." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2019. http://d-nb.info/1200058712/34.
Повний текст джерелаAkbulut, Burak. "Attitude Control Of Multiple Rigid Body Spacecraft With Flexible Hinge Joints." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611079/index.pdf.
Повний текст джерелаOral, Gokhan. "Flexible Multibody Dynamic Modeling And Simulation Of Rhex Hexapod Robot With Half Circular Compliant Legs." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610137/index.pdf.
Повний текст джерелаSpratley, Edward. "The Design and Validation of a Computational Rigid Body Model of the Elbow." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1998.
Повний текст джерелаCebulla, Thomas [Verfasser], Heinz [Akademischer Betreuer] Ulbrich, and Carlo L. [Akademischer Betreuer] Bottasso. "Spatial Dynamics of Pushbelt CVTs: Model Enhancements to a Non-smooth Flexible Multibody System / Thomas Cebulla. Gutachter: Heinz Ulbrich ; Carlo L. Bottasso. Betreuer: Heinz Ulbrich." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1050025792/34.
Повний текст джерелаEpple, Alexander. "Methods for increased computational efficiency of multibody simulations." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26532.
Повний текст джерелаCommittee Chair: Olivier A. Bauchau; Committee Member: Andrew Makeev; Committee Member: Carlo L. Bottasso; Committee Member: Dewey H. Hodges; Committee Member: Massimo Ruzzene. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Mureithi, Njuki W. "An experimental study of the flow structure and dynamics of a flexible cylinder within an array of rigid cylinders subjected to water cross-flow /." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61717.
Повний текст джерелаWoodcock, Cassandra. "The Design and Validation of a Computational Rigid Body Model for Study of the Radial Head." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3277.
Повний текст джерелаLuu, Quang Khanh [Verfasser], Dirk [Akademischer Betreuer] Söffker, and Tamara [Akademischer Betreuer] Nestorovic. "Stability-Oriented Dynamics and Control of Complex Rigid-Flexible Mechanical Systems Using the Example of a Bucket-Wheel Excavator / Quang Khanh Luu. Gutachter: Tamara Nestorovic. Betreuer: Dirk Söffker." Duisburg, 2015. http://d-nb.info/1066206376/34.
Повний текст джерелаLuu, Quang Khanh Verfasser], Dirk [Akademischer Betreuer] [Söffker, and Tamara [Akademischer Betreuer] Nestorovic. "Stability-Oriented Dynamics and Control of Complex Rigid-Flexible Mechanical Systems Using the Example of a Bucket-Wheel Excavator / Quang Khanh Luu. Gutachter: Tamara Nestorovic. Betreuer: Dirk Söffker." Duisburg, 2015. http://d-nb.info/1066206376/34.
Повний текст джерелаLacoursière, Claude. "Ghosts and machines : regularized variational methods for interactive simulations of multibodies with dry frictional contacts." Doctoral thesis, Umeå University, Computing Science, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1143.
Повний текст джерелаA time-discrete formulation of the variational principle of mechanics is used to provide a consistent theoretical framework for the construction and analysis of low order integration methods. These are applied to mechanical systems subject to mixed constraints and dry frictional contacts and impacts---machines. The framework includes physics motivated constraint regularization and stabilization schemes. This is done by adding potential energy and Rayleigh dissipation terms in the Lagrangian formulation used throughout. These terms explicitly depend on the value of the Lagrange multipliers enforcing constraints. Having finite energy, the multipliers are thus massless ghost particles. The main numerical stepping method produced with the framework is called SPOOK.
Variational integrators preserve physical invariants globally, exactly in some cases, approximately but within fixed global bounds for others. This allows to product realistic physical trajectories even with the low order methods. These are needed in the solution of nonsmooth problems such as dry frictional contacts and in addition, they are computationally inexpensive. The combination of strong stability, low order, and the global preservation of invariants allows for large integration time steps, but without loosing accuracy on the important and visible physical quantities. SPOOK is thus well-suited for interactive simulations, such as those commonly used in virtual environment applications, because it is fast, stable, and faithful to the physics.
New results include a stable discretization of highly oscillatory terms of constraint regularization; a linearly stable constraint stabilization scheme based on ghost potential and Rayleigh dissipation terms; a single-step, strictly dissipative, approximate impact model; a quasi-linear complementarity formulation of dry friction that is isotropic and solvable for any nonnegative value of friction coefficients; an analysis of a splitting scheme to solve frictional contact complementarity problems; a stable, quaternion-based rigid body stepping scheme and a stable linear approximation thereof. SPOOK includes all these elements. It is linearly implicit and linearly stable, it requires the solution of either one linear system of equations of one mixed linear complementarity problem per regular time step, and two of the same when an impact condition is detected. The changes in energy caused by constraints, impacts, and dry friction, are all shown to be strictly dissipative in comparison with the free system. Since all regularization and stabilization parameters are introduced in the physics, they map directly onto physical properties and thus allow modeling of a variety of phenomena, such as constraint compliance, for instance.
Tutorial material is included for continuous and discrete-time analytic mechanics, quaternion algebra, complementarity problems, rigid body dynamics, constraint kinematics, and special topics in numerical linear algebra needed in the solution of the stepping equations of SPOOK.
The qualitative and quantitative aspects of SPOOK are demonstrated by comparison with a variety of standard techniques on well known test cases which are analyzed in details. SPOOK compares favorably for all these examples. In particular, it handles ill-posed and degenerate problems seamlessly and systematically. An implementation suitable for large scale performance and accuracy testing is left for future work.
Martz, Yannick. "Modélisation et commande de systèmes d'entraînement de bandes flexibles : nouvelles approches à l'aide des éléments finis." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAD016.
Повний текст джерелаRoll-to-Roll systems are used in the manufacturing of a wide variety of everyday products as well as in metallurgy and for the manufacturing of new technologies. The improvement of Roll-to-Roll systems is a difficult problem because they are large, non-linear, with varying and uncertain parameters. They have a coupling between the different parts (mechanical and control) with the help of the web connecting the elements. It is therefore necessary to improve the process line through a multidisciplinary approach. The objectives are to master the key parameters of these systems in order to guarantee the manufacturing rates and the more important accuracies requested. It is also necessary to reduce or remove the most recurring defects such as web wrinkles. Until now, only 1D models were used. They are essential for control synthesis and frequency studies but they do not allow to study complex phenomena such as web wrinkles. A new approach for studying these systems is developed. First, improvements of control structures are proposed. Secondly, a 3D finite element model using a flexible multibody dynamics algorithm is developed, used in this work to study web wrinkles and compared to the classical prediction theory of these defects. Finally, a complete simulator is developed including the mechanical 3D model by finite element coupled to the control part (co-simulation)
Nandihal, Paramanand Vivekanand. "Dynamics of rigid-flexible multibody systems." Thesis, 2018. http://localhost:8080/iit/handle/2074/7765.
Повний текст джерелаZhao, Zhicheng. "Dynamics of a general flexible multibody system." 1992. http://hdl.handle.net/1993/29500.
Повний текст джерелаYeh, Chun-tien. "Dynamics and control of a rigid/flexible manipulator." Thesis, 1992. http://hdl.handle.net/1957/37233.
Повний текст джерелаGraduation date: 1992
Khude, Naresh Nilkanth. "Modal analysis of a helicopter wing-pylon structure using flexible multibody dynamics." 2006. http://etd.utk.edu/2006/KhudeNaresh.pdf.
Повний текст джерелаLeyendecker, Sigrid [Verfasser]. "Mechanical integrators for constrained dynamical systems in flexible multibody dynamics / Sigrid Leyendecker." 2006. http://d-nb.info/980411912/34.
Повний текст джерелаFindlay, Everett. "Investigation of Active Vibration Suppression of a Flexible Satellite using Magnetic Attitude Control." Thesis, 2011. http://hdl.handle.net/1807/30593.
Повний текст джерелаWang, Ding-Qin, and 王鼎欽. "A Simulation of Conjugated Polymer with Rigid Segments and Flexible Links through All-Atom and Coarse-Grained Molecular Dynamics Methods." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/88737983856391933648.
Повний текст джерела國立臺灣大學
高分子科學與工程學研究所
101
We developed a coarse-grained force field for the Poly(p-biphenylene terephthalate)-O9 alternating copolymer which consist of biphenyl group and ester group in main-chain and lateral alkyl chain in side chain, respectively. We adopted iterative Bozeman inversion method to develop a coarse-grained force field connecting with all-atom molecular dynamics. The force field contains intra- and inter-molecular interactions including bonds, angles, dihedral angles, and nonbonded terms. Through comparison of RDF, bond length distribution, angle distribution, and dihedral angle distribution are fitted between all-atom and coarse-grained molecular dynamics to comprehend the mapping results. The results indicated the disordered and locally ordered packing are revealed in mapping of single chain and 4 chains, respectively. Otherwise, the dihedral angle parameter is the most important parameter to affect the chain conformation and packing behavior. Besides, the incompatibility between main-chain and side-chain help the PBpT-O9 to pack into ordered morphology. Finally, the effective coarse-grained force field parameters are obtained to describe the realistic polymer chain.
Bondoky, Karim. "A Contribution to Validation and Testing of Non-Compliant Docking Contact Dynamics of Small and Rigid Satellites Using Hardware-In-The-Loop Simulation." 2020. https://tud.qucosa.de/id/qucosa%3A73251.
Повний текст джерелаDas, Prashant. "Unsteady Two Dimensional Jet with Flexible Flaps at the Exit." Thesis, 2016. https://etd.iisc.ac.in/handle/2005/2752.
Повний текст джерелаDas, Prashant. "Unsteady Two Dimensional Jet with Flexible Flaps at the Exit." Thesis, 2016. http://hdl.handle.net/2005/2752.
Повний текст джерелаShinde, Sachin Yashavant. "Creation of an Orderly Jet and Thrust Generation in Quiescent Fluid from an Oscillating Two-dimensional Flexible Foil." Thesis, 2012. http://etd.iisc.ac.in/handle/2005/3160.
Повний текст джерела