Sökning: "Multibody Systems"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden Multibody Systems.

  1. 1. Active Vibration Control of Multibody Systems Application to Automotive Design

    Detta är en avhandling från Uppsala : Institutionen för informationsteknologi

    Författare :Claes Olsson; Uppsala universitet.; Uppsala universitet.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Active Vibration Control; Vibration Isolation; Feedback Control; Adaptive Filtering; Saturation; Limit Cycles; Multi Body Systems; Modelling; Simulation; Non-linearity; Gain Scheduling; Structure Flexibility; TECHNOLOGY Information technology Automatic control; TEKNIKVETENSKAP Informationsteknik Reglerteknik;

    Sammanfattning : Active vibration control to reduce vibrations and structure borne noise is considered using a powerful multi-disciplinary virtual design environment which enables control system design to be considered as an integral part of the overall vehicle design.The main application studied is active automotive engine vibration isolation where, first, the potential of large frequency band multi-input multi-output H2 feedback control is considered. LÄS MER

  2. 2. Ghosts and machines regularized variational methods for interactive simulations of multibodies with dry frictional contacts

    Detta är en avhandling från Umeå : Datavetenskap

    Författare :Claude Lacoursière; Umeå universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Discrete mechanics; Variational method; Contact problems; Impacts; Least action principle; Saddle point problems; Lagrange Multipliers; Constrained systems; Multibody Systems; Numerical regularization; Constraint realization; Constraint stabilization; Dry friction; Differential Algebraic Equations; Nonsmooth problems; Linear Complementarity; Quaternion algebra; Numerical linear algebra; Physics modeling; Interactive simulation; Numerical stability; Rigid body dynamics; Dissipative systems; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik;

    Sammanfattning : A 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. LÄS MER

  3. 3. Passive control of mechanical systems

    Detta är en avhandling från Stockholm : Mekanik

    Författare :Jesper Adolfsson; KTH.; [2001]
    Nyckelord :autobalancing; bipedal ealking; multibody systems; onlinear dynamics. Stability; bifurcations; limit cycles; variation equatins; discontinuites;

    Sammanfattning : .... LÄS MER

  4. 4. Wavelet Galerkin methods for elastic multibody systems with unilateral contact constraints

    Detta är en avhandling från Numerical Analysis, Lund University

    Författare :José Díaz López; Lund University.; Lunds universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer science; Elastic MBS; Contact; Unilateral Contraints; Wavelet; DAE; Daubechies; numerical analysis; systems; control; Datalogi; numerisk analys; system; kontroll;

    Sammanfattning : In this thesis we investigate the applicability of wavelets to simulate the time behavior of elastic multibody systems (MBS) with contact constraints. For this end, a wavelet element method (WEM) was implemented, exploiting the special structure of the coupled ODE/PDE equations that govern elastic MBS. LÄS MER

  5. 5. Methods for Direct Optimal Control of Multibody Systems

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Staffan C Björkenstam; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; discrete mechanics; robotics; Optimal control; motion planning; multibody dynamics; digital human modeling;

    Sammanfattning : In this thesis we present practical tools and techniques to numerically solve optimal control problems involving multibody systems. The driving application for the thesis has been developing motion planning tools for industrial robots and digital humans. LÄS MER