Authors:
Christelle Pittet,
Jean Mignot,
Christine Fallet,
Volume: 1, Page 4000 Paper number 25
Abstract:
In this paper, an applicative example of multi-objective control based
on Linear Matrix Inequalities (LMIs) is presented. H infinity optimization
is used to synthesize a dynamic output feedback controller for a microsatellite
subject to disturbances, important sensor time delay, actuator saturation
and flexible modes. The reduced controller is compared with classical
phase lead controller and finally validated with the complete nonlinear
satellite model.
Authors:
Wen-Jun Cao,
Jian-Xin Xu,
Volume: 1, Page 4006 Paper number 1364
Abstract:
In this paper, tip regulation of a flexible one-link manipulator by
Learning Variable Structure Control (LVSC) is investigated. Sliding
surface is designed according to a selected reference model which relocates
system poles to be negative real ones, hence link vibration is eliminated.
The proposed LVSC incorporates a learning mechanism to improve regulation
accuracy. Rigorous proof shows: the state's tracking error sequence
converges uniformly to zero; the uniformly bounded learning control
sequence converges to the equivalent control almost everywhere. A more
detailed journal version of this paper is presented in [1].
Authors:
Hiroaki Fukushima,
Yue Wu,
Toshiharu Sugie,
Gi-Hwan Bae,
Yoshiyuki Suzuki,
Volume: 1, Page 4012 Paper number 1953
Abstract:
In this paper, we perform the seismic control experiment of a flexible
structure in order to investigate applicability of the model set identification
methods to robust controller design. From the viewpoint of application
to robust control, we identify model sets based on nominal models represented
by rational transfer functions, in contrary to most existing methods
based on affinely parameterized functions which tend to be high order
functions. Also, we derive a less conservative error bound which takes
account of low correlation properties of input signals. Based on the
model set identification method and the (cal) H_(infinity) controller
design method based on LMI, we show that a closed-loop system which
satisfies given design specifications is obtained systematically.
Authors:
Sam Behrens,
S. O. Reza Moheimani,
Volume: 1, Page 4018 Paper number 1551
Abstract:
In this paper a methodology that addresses the problem of choosing
optimal resistive elements for multiple mode shunt damping of a piezoelectric
laminate is presented. The proposed method is based on the H_2 norm
optimization for the composite system, and is validated through experimental
work on a piezoelectric laminated simply-supported beam.
Authors:
Reza Olfati-Saber,
Volume: 1, Page 4024 Paper number 1100
Abstract:
In this paper, we introduce a method that provides a nonlinear noncollocated
output for trajectory tracking of a flexible one-link robot. The link
is modeled as a finite-order Lagrangian system obtained from truncated
modal analysis. This noncollocated output is derived based on viewing
a flexible link robot arm as an underactuated mechanical system and
then applying an appropriate change of coordinates that transforms
the system into a cascade nonlinear system with a minimum-phase zero
dynamics. The output is the angle of rotation augmented with the (generalized)
saturation of the weighted amplitudes of the deflection modes of the
flexible link.
Authors:
José Andrés Somolinos,
Vicente Feliu,
Andrés García,
Volume: 1, Page 4030 Paper number 1732
Abstract:
This paper describes the stability analysis of a new control scheme
for a three-degree-of-freedom flexible arm under tip payload changes.
The arm was built with light links, has most of its mass concentrated
at the tip, and uses a special mechanical configuration to approximately
decouple radial tip motion from angular motions. This special configuration
facilitates the modeling and control of the arm. A two nested loop
controls the tip position. The value of the tip mass is used as a parameter
to design the outer controller. Theoretical stability analysis of the
controlled arm is carried out when tip mass differs from the mass used
to design the outer loop. Experimental results are presented
Authors:
Gerardo Espinosa-Pérez,
Hebertt Sira-Ramírez,
Miguel Ríos-Bolívar,
Volume: 1, Page 4036 Paper number 1317
Abstract:
A passivity based controller is proposed for the regulation of the
PPR mobile robot equipped with an underactuated arm coupled to the
main robot body by means of a flexible joint. The system, which happens
to be differentially flat, can then be controlled using a combination
of the passivity based approach and trajectory planning facilitated
by the flatness property of the system.
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