Authors:
Manfredi Maggiore,
Kevin Passino,
Volume: 1, Page 2902 Paper number 1741
Abstract:
We introduce a new output feedback controller for general MIMO nonlinear
systems which are only observable on regions of the state and input
spaces. Unlike previous approaches, we do not add integrators at the
input side of the system, and thus avoid the need to design a stabilizing
control law for a higher order system. Robustness with respect to
a class of time-varying disturbances is guaranteed, and the performance
of any state feedback controller designed to achieve closed-loop stability
with respect to a set (e.g., a robust controller) is recovered.
Authors:
Yiguang Hong,
Guowu Yang,
Linda G. Bushnell,
Hua O. Wang,
Volume: 1, Page 2908 Paper number 1670
Abstract:
This paper addresses the problem of global finite-time design via dynamic
output feedback. The results are obtained in the form of the so-called
"separation principle", i.e., the design methods for the finite-time
output feedback laws are based on finite-time state feedback laws and
finite-time observers, which can be designed separately. Conditions
are given to assure that the constructed output feedback laws render
the closed-loop systems globally finite-time convergent or even finite-time
stable.
Authors:
Giovanni Luca Santosuosso,
Patrizio Tomei,
Volume: 1, Page 2914 Paper number 1609
Abstract:
In this paper we consider a class of nonlinear systems in which a set
of constant parameters is unknown and some state variables are not
available for measurement. For such systems we provide a constructive
procedure for the solution of the global adaptive tracking problem
with dynamic partial state feedback. We illustrate an application of
the control strategy to the adaptive nonlinear friction compensation
of a DC motor servomechanism. We improve previous results in two directions:
we allow for a subset of the unmeasurable states to enter in the system
nonlinearly; we consider systems which are linearly parametrized with
respect to a set of unknown constant parameters.
Authors:
Alessandro Astolfi,
Patrizio Colaneri,
Volume: 1, Page 2920 Paper number 1140
Abstract:
The static output feedback stabilization problem for linear and nonlinear
(affine) systems is discussed. A novel necessary and sufficient condition
for linear systems is proposed. For nonlinear systems a sufficient
condition is established and a (partial) converse is also discussed.
The nonlinear formulation is used to derive a simple characterization
of stabilizing static output feedback control laws for linear systems
in terms of the intersection of two convex sets and a (generally) non-convex
set. This characterization is used to establish a series of simple
obstructions to the solvability of the problem for linear SISO systems.
A fully worked out example complete the paper.
Authors:
Teddy M. Cheng,
Ray P. Eaton,
David J. Clements,
Volume: 1, Page 2926 Paper number 1138
Abstract:
This paper describes a direct way to solve the robust output feedback
stabilization problem for a class of uncertain nonlinear systems with
nonlinear parameterization using the backstepping technique. The backstepping
method is performed in a batch way rather than recursively. The paper
begins with the stabilization of a system containing a series of integrators
with unknown gains. The solution of the problem is then used to solve
the output feedback stabilization problem of the nonlinear system.
Authors:
Kenji Fujimoto,
Jacquelien M.A. Scherpen,
Volume: 1, Page 2928 Paper number 1453
Abstract:
This paper is concerned with the output feedback stabilization of a
class of nonholonomic systems in port-controlled Hamiltonian formulae
via generalized canonical transformations. In order to obtain a dynamic
feedback, an integrator is added to the system firstly. Then the generalized
canonical transformation is utilized to let the integrator play the
role of an estimator of the unmeasurable state based on passivity.
This technique can derive a time-varying output feedback stabilizing
controller under a certain assumption. Furthermore the effectiveness
of the proposed technique is demonstrated via a well known knife edge
example.
Authors:
Ilya G. Polushin,
Volume: 1, Page 2934 Paper number 9087
Abstract:
Two problems concerned with output feedback control of passive nonlinear
systems under input affine perturbations are considered. The first
one is the problem of input-to-state stabilization of passive system
with respect to "perturbation" input with semiglobal ISS gain assignment.
The second problem is ultimate boundedness control of nominally passive
nonlinear systems with structured uncertainties satisfying a matching
condition. The key assumption is output-to-state stability of the system.
It is shown that under this assumption both problems are solvable by
almost smooth static output feedback.
|