Matching in the method of controlled Lagrangians and IDA-passivity based control

G. Blankenstein, Romeo Ortega, Arjan van der Schaft

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    This paper reviews the method of controlled Lagrangians and the interconnection and damping assignment passivity based control (IDA-PBC)method. Both methods have been presented recently in the literature as means to stabilize a desired equilibrium point of an Euler-Lagrange system, respectively Hamiltonian system, by searching for a stabilizing structure preserving feedback law. The conditions under which two Euler-Lagrange or Hamiltonian systems are equivalent under feedback are called the matching conditions (consisting of a set of nonlinear PDEs). Both methods are applied to the general class of underactuated mechanical systems and it is shown that the IDA-PBC method contains the controlled Lagrangians method as a special case by choosing an appropriate closed-loop interconnection structure. Moreover, explicit conditions are derived under which the closed-loop Hamiltonian system is integrable, leading to the introduction of gyroscopic terms. The $\lambda$-method as introduced in recent papers for the controlled Lagrangians method transforms the matching conditions into a set of linear PDEs. In this paper the method is extended, transforming the matching conditions obtained in the IDA-PBC method into a set of quasi-linear and linear PDEs.
    Original languageUndefined
    Title of host publicationNonlinear and Adaptive Control: Tools and Algorithms for the User
    EditorsA. Astolfi
    Place of PublicationSingapore
    PublisherWorld Scientific
    Number of pages36
    ISBN (Print)1-86094-617-8
    Publication statusPublished - 2006

    Publication series

    PublisherWorld Scientific


    • METIS-237838
    • EWI-8860
    • IR-66801

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