Authors:
Jacquelien M.A. Scherpen,
Kenji Fujimoto,
W. Steven Gray,
Volume: 1, Page 5102 Paper number 1287
Abstract:
This paper studies previously developed nonlinear Hilbert adjoint operator
theory from a variational point of view and provides a formal justification
for the use of Hamiltonian extensions via Gateaux differentials. The
primary motivation is its use in characterizing singular values of
nonlinear operators, and in particular, the Hankel operator and its
relationship to the state space notion of nonlinear balanced realizations.
Authors:
S. Stramigioli,
A.V.D. Schaft,
B. Maschke,
S. Andreotti,
C. Melchiorri,
Volume: 1, Page 5108 Paper number 1258
Abstract:
In this paper we study the interconnection of two port controlled Hamiltonian
systems through a transmission line with delay. The contributions
of the paper are firstly a geometrical, multi-dimensional, power consistent
exposition of tele-manipulation of Intrinsically Passive Controlled
(IPC) physical systems (Stramigioli 1998), with a clarification on
impedance matching, and secondly a system theoretic condition for the
adaptation of a general port controlled Hamiltonian system with dissipation
(PCHD system) to a transmission line. To the knowledge of the authors,
the latter result in particular has never appeared in such a general
form. Experimental results on an Internet implementation are also presented.
Authors:
Karel Volckaert,
Dirk Aeyels,
Volume: 1, Page 5114 Paper number 1270
Abstract:
We outline a method for dealing with controlled mechanical systems
with degenerate Lagrangians, or singular optimal control problems with
degenerate cost functions. We show how consistent equations of motion
can be obtained despite the -- implicit -- constraint of degeneracy,
and state conditions on which the system exhibits unique solutions
(on a reduced phase space). This method is adopted from results in
classical mechanics, viz. the Gotay-Nester-Hinds algorithm for the
resolution of constraints in presymplectic systems. We illustrate with
an example from singular linear optimal control theory.
Authors:
Andrew D. Lewis,
Volume: 1, Page 5119 Paper number 1645
Abstract:
The category of affine connection control systems is one whose objects
are control systems whose drift vector field is the geodesic spray
of an affine connection, and whose control vector fields are vertical
lifts to the tangent bundle of vector fields on configuration space.
We initiate an investigation of morphisms (feedback transformations)
in this category, including the study of subsystems and factor systems.
Authors:
Daizhan Cheng,
Sarah K. Spurgeon,
Jianping Xiang,
Volume: 1, Page 5125 Paper number 8019
Abstract:
The generalized Hamiltonian realization problem is discussed in this
paper. Three kinds of realizations are investigated. The first is the
generalized Hamiltonian realization of a dynamic system. As an example,
the excitation control system [4] is investigated. The feedback dissipative
realization of controlled Hamiltonian systems is then considered. A
necessary and sufficient condition for existence of this realization
is obtained. Finally, the approximate realization is considered. A
normal form result is implemented to provide certain computable conditions.
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