@inproceedings{GawBal05,
author = {P.J. Gawthrop and D.J. Ballance},
title = {Virtual Actuator Control of Mechanical Systems},
crossref = {ICBGM05},
pages = {233-238},
abstract = {
The virtual actuator approach is explained and illustrated using
three experimental systems. Conclusions are drawn about the
importance of transfer system design.
}
}
@inproceedings{BalBevGawDis05,
author = {Donald J. Ballance and Geraint P. Bevan and Peter
J. Gawthrop and Dominic J. Diston},
title = {Model Transformation Tools ({MTT}): The Open Source
Bond Graph Project},
crossref = {ICBGM05},
pages = {123-128},
abstract = {The rapid growth of GNU/Linux in recent years has
focused attention on free and open source
software. MTT (Model Transformation Tools) is, as
far as the authors are aware, the only open source
project related to bond graphs. This paper surveys
MTT in its present form and invites collaboration
from the wider bond graph community.}
}
@inproceedings{DisGawBevBal05,
author = {Dominic J. Diston and Peter J. Gawthrop and Geraint
P. Bevan and Donald J. Ballance},
title = {Next-Generation Transformation Tools for Scalable
Integrated System Modelling},
crossref = {ICBGM05},
pages = {143-148},
abstract = {Bond graph modelling has been applied widely and
many ideas have been collected from the user
community for improvement, particularly associated
with federated systems. A project is underway to
address these via a prototype toolset with the
working title of Next-Generation Transformation
Tools (NTT). This paper will summarise the
motivations behind this development and describe
notational changes that have been found
necessary. This should provide useful insights into
the problem of large-scale bond graphs.}
}
@article{GawWalWag05,
author = {P.J. Gawthrop and M.I. Wallace and D.J. Wagg},
title = {Bond-graph Based Substructuring of Dynamical Systems},
journal = {Earthquake Engng Struc. Dyn.},
year = 2005,
volume = 34,
number = 6,
pages = {687-703},
month = {May},
abstract = {
A bond graph approach to hybrid simulation of dynamical systems using
numerical-experimental real-time substructuring is presented. The
bond graph concepts of a {virtual junction} and a {virtual
actuator}, hitherto used in the context of physical-model based
control, are used to perform the substructuring in an intuitively
appealing way. The approach is illustrated by the reworking of a
previously-published example.
The approach is verified experimentally using a bench-top multiple
mass-spring system for the physical substructure and automatically
generated real-time code is used to implement the numerical
substructure.
},
doi = {10.1002/eqe.450}
}
@inproceedings{GawCheWan05,
author = {Peter J Gawthrop and Wen-Hua Chen and Liuping Wang},
title = {Continuous-time {LQ} Predictive Pole-placement Control},
crossref = {IFAC16},
abstract = {
The previously developed Predictive Pole Placement (PPP)
controller is modified to give enhanced numerical and
stability properties by embedding the method in a
linear-quadratic formulation to give a linear-quadratic
PPP (LQPPP) controller. Input, output and state
constraints are considered using an natural quadratic
programming (QP) formulation of LQPPP. Illustrative
examples are given.
}
}
@inproceedings{WanGawYou05,
author = {L. Wang and P.J. Gawthrop and P.C. Young},
title = {Continuous-time System Identification of Nonparametric Models
with Constraints},
crossref = {IFAC16},
abstract = {Although structural constraints such as model order
and time delay have been incorporated in the
continuous time system identification since its
origin, the constraints on the estimated model
parameters were rarely enforced. This paper proposes a
continuous time system identification approach with
constraints. It shows that by incorporating physical
parameter information known a priori as hard
constraints, the traditional parameter estimation
schemes are modified to minimize a quadratic cost
function with linear inequality constraints. Using the
structure of Frequency Sampling Filters as the
vehicle, the paper shows that the constraints can be
readily imposed on continuous time frequency response
estimation and step response estimation. In
particular, a priori knowledge in both time-domain and
frequency domain is utilized simultaneously as the
constraints for the optimal parameter solution. A
Monte-Carlo simulation study with 100 noise
realization is used to demonstrate the improvement of
the estimation results in terms of continuous time
frequency response and continuous time step response.}
}
@article{GawWan05,
author = {P.J. Gawthrop and L. Wang},
title = {Data Compression for Estimation of the Physical Parameters
of Stable and Unstable Linear Systems},
journal = {Automatica},
year = 2005,
volume = 41,
number = 8,
pages = {1313-1321},
month = {August},
abstract = {
A two-stage method for the identification of physical system
parameters from experimental data is presented. The first stage
compresses the data as an empirical model which encapsulates
the data content at frequencies of interest. The second stage then
uses data extracted from the empirical model of the first stage
within a non-linear estimation scheme to estimate the unknown
physical parameters. Furthermore, the paper proposes use of
exponential data weighting in the identification of partially
unknown, unstable systems so that they can be treated in the same
framework of a stable system. Experimental data are used to
demonstrate the efficacy of the proposed approach.
},
doi = {10.1016/j.automatica.2005.03.013}
}
@article{Gaw05,
author = {Peter J Gawthrop},
title = {Virtual Actuators with Virtual Sensors},
journal = {Proceedings of the Institution of Mechanical Engineers
Pt. I: Journal of Systems and Control Engineering},
year = 2005,
volume = 219,
number = 5,
pages = {371 -- 377},
month = {August},
abstract = {The virtual actuator approach to bond graph based
control is extended to use virtual sensor
inputs. This allows relative degree conditions on the
controller to be relaxed. Furthermore, the effect of
the transfer system can be eliminated from the closed
loop system. Illustrative examples are given.},
doi = {10.1243/095965105X33473}
}
@proceedings{ICBGM05,
key = {International Conference On Bond Graph Modeling 2005},
title = {Proceedings of the International Conference On Bond
Graph Modeling and Simulation (ICBGM'05)},
booktitle = {Proceedings of the 2005 International Conference On Bond
Graph Modeling and Simulation (ICBGM'05)},
series = {Simulation Series},
publisher = {Society for Computer Simulation},
address = {New Orleans, U.S.A.},
month = {January},
year = 2005
}
@proceedings{IFAC16,
key = {IFAC World Congress 2005},
title = {Proceedings of the 16th IFAC World Congress},
booktitle = {Proceedings of the 16th IFAC World Congress},
address = {Prague},
year = 2005
}
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