ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Springer  (12)
  • Oxford University Press  (5)
  • Springer Nature  (3)
  • 1995-1999  (20)
  • 1
    Digitale Medien
    Digitale Medien
    Static analysis of a two-member linkage interacting with a given surface (1999)
    Springer
    Archive of applied mechanics 69 (1999), S. 429-442 
    Details
    ISSN: 1432-0681
    Schlagwort(e): Key words statics ; two-member linkage ; Coulomb friction ; robotics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Summary The static interaction of a two-member linkage with a given surface is investigated. Dry friction acts at the point of contact of the linkage with the surface. The linkage has two drives generating torques at its joints. The optimal distribution of the joint torques is determined to maximize the friction force at the point of contact. The dependence of this maximal force on the lengths of the links and on the linkage configuration is investigated. The results obtained can be applied to the analysis and optimization of various robotic systems, in particular, manipulators interacting with rough surfaces and walking machines, especially tube-crawling robots.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004190050232
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Unilateral problems of dynamics (1999)
    Springer
    Archive of applied mechanics 69 (1999), S. 503-527 
    Details
    ISSN: 1432-0681
    Schlagwort(e): Key words Unilateral contact ; multibody dynamics ; complementarity ; friction ; impact
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Summary Contact processes may be described by local discretizations, by rigid representation or by mixed methods incorporating both ideas. A rigid body approach is proposed for the dynamics of mechanical systems, achieving good results also for multiple-contact problems. Contacts in multibody systems are mainly considered, with the corresponding contact constraints varying with time, thus generating structure-variant systems. The equations of motion for dynamical systems with such unilateral behavior are discussed, solution methods and applications are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004190050240
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Dynamics of spatial structure-varying rigid multibody systems (1999)
    Springer
    Archive of applied mechanics 69 (1999), S. 265-285 
    Details
    ISSN: 1432-0681
    Schlagwort(e): Key words Multibody system ; contact ; unilateral constraint ; Coulomb friction ; stick-slip ; variational inequality.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Summary Couplings in machines and mechanisms exhibiting backlash and friction phenomena can be modeled as multibody systems with unilateral constraints and Coulomb friction. The structure of the differential-algebraic equations describing the system depends on the state of the constraints. The contact forces occurring at active constraints are taken into account in the equations of motion as Lagrange multipliers. Additionally, the kinematic conditions of all active constraints are formulated on the acceleration level. Contact and friction laws are sufficient conditions for state transitions of active constraints, and are represented by nonsmooth characteristics. Several formulations, like the linear complementarity problem, and two different nonlinear systems of equations are presented together with their solution method. The theory is applied to a mechanical system containing three-dimensional and coupled unilateral constraints with friction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004190050219
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    The principle of virtual work in mechanical and electromechanical systems (1995)
    Springer
    Archive of applied mechanics 65 (1995), S. 390-400 
    Details
    ISSN: 1432-0681
    Schlagwort(e): virtual work ; electromechanical systems ; unifying modelling ; constraints ; mechatronics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Summary The principle of virtual work is applied to electromechanical systems as the foundation of a unifying concept for modelling mechatronical systems. After the presentation of an important result in the field of mechanics, the expansion of the principle on electrical networks and electromechanical systems is shown. The use of the principle of virtual work in the domain of electromechanics yields an analogous form to the central equation of mechanics which is valid for holonomic and nonholonomic systems. The electrotechnical part of the system is confined to networks. The derivation of the mathematical model is demonstrated on the example of a simple electromechanical oscillation circuit. In addition, the physical systems are separately treated, taking into account the explicit constraints on the basis of the Lagrangian multiplier method.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00787532
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    The complexity of induced minors and related problems (1995)
    Springer
    Algorithmica 13 (1995), S. 266-282 
    Details
    ISSN: 1432-0541
    Schlagwort(e): Graph minors ; NP-completeness ; Planar graphs ; Matching problems ; Treewidth
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik , Mathematik
    Notizen: Abstract The computational complexity of a number of problems concerning induced structures in graphs is studied, and compared with the complexity of corresponding problems concerning non-induced structures. The effect on these problems of restricting the input to planar graphs is also considered. The principal results include: (1) Induced Maximum Matching and Induced Directed Path are NP-complete for planar graphs, (2) for every fixed graphH, InducedH-Minor Testing can be accomplished for planar graphs in time0(n), and (3) there are graphsH for which InducedH-Minor Testing is NP-complete for unrestricted input. Some useful structural theorems concerning induced minors are presented, including a bound on the treewidth of planar graphs that exclude a planar induced minor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01190507
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Multiple impacts with friction in rigid multibody systems (1995)
    Springer
    Nonlinear dynamics 7 (1995), S. 471-497 
    Details
    ISSN: 1573-269X
    Schlagwort(e): Impacts with friction ; multibody systems ; unilateral constraints ; complementarity problems
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract An impact model for two-dimensional contact situations is developed which contains the main physical effects of a compliance element in the normal direction and a series of a compliance and Coulomb friction elements in the tangential direction. For systems with multiple impacts a unilateral formulation based on Poisson's hypothesis is used to describe the impulses which are transferred in the normal direction. The event of an impact is divided into two phases. The phase of compression ends with vanishing approaching velocity if normal impulses are transferred and is equivalent to a completely inelastic collision. The phase of expansion allows the bodies to separate under the action of the normal impulses whenever they are large enough. The absolute values of the tangential impulses are bounded by the magnitudes of the normal impulses, due to the Coulomb friction relationship on the impulse level. One part of the transferred tangential impulse during compression is assumed to be partly reversible which may be regarded as an application of Poisson's law. The remaining part is completely irreversible and considered friction. This formulation contains the special case of completely elastic tangential impacts as well as the situation when only Coulomb friction acts. It is proven that the presented impact model is always dissipative or energy preserving. The evaluation of the problem is done by solving one set of complementarity conditions during compression and a nearly identical set of equations during expansion. The theory is applied to some basic examples which demonstrate the difference between Newton's and Poisson's hypotheses.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00121109
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    facet.materialart.
    Unbekannt
    Dynamics of spatial structure-varying rigid multibody systems (1999)
    Springer
    Details
    Publikationsdatum: 1999-05-31
    Print ISSN: 0939-1533
    Digitale ISSN: 1432-0681
    Thema: Maschinenbau
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 8
    facet.materialart.
    Unbekannt
    The complexity of induced minors and related problems (1995)
    Springer
    Details
    Publikationsdatum: 1995-03-01
    Print ISSN: 0178-4617
    Digitale ISSN: 1432-0541
    Thema: Informatik , Mathematik
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 9
    facet.materialart.
    Unbekannt
    Unilateral problems of dynamics (1999)
    Springer
    Details
    Publikationsdatum: 1999-11-03
    Print ISSN: 0939-1533
    Digitale ISSN: 1432-0681
    Thema: Maschinenbau
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 10
    facet.materialart.
    Unbekannt
    Static analysis of a two-member linkage interacting with a given surface (1999)
    Springer
    Details
    Publikationsdatum: 1999-08-23
    Print ISSN: 0939-1533
    Digitale ISSN: 1432-0681
    Thema: Maschinenbau
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...