3rd šIFAC WORKSHOP
Automatic systems for building the infrastructure in developing countries
(Knowledge and Technology Transfer)
(Istanbul,
Republic of Turkey, June, 2003)
V.A.Trapeznikov Institute of Control Sciences of RAS
Profsoyuznaya, 65, Moscow, 117997, Russia
The 3-rd IFAC Workshop on Automatic Systems for Building the
Infrastructure in Developing Countries (Knowledge and Technology Transfer) was
held at the Istanbul Technical University (ITU) from June 26 to June 28, 2003.
The International Programme Committee was headed by two Co-Chairmen: Prof. A.T.Dinibutun (Turkey) and Prof.
G.M.Dimirovski (Macedonia, Turkey). The National Organizing Committee was
headed by two Co-Chairmen: Prof. A.Bir (ITU) and Prof. I.Eksin (ITU).
The Workshop was sponsored by International
Federation of Automatic Control (IFAC), IFAC Technical Committee on Developing
Countries (GEA), The Scientific and Technical Research Council of Turkey
(TUBITAK), Dogus University (DOU), Istanbul Technical University (ITU), EU MathIND
Project and Co-sponsored by IFAC Technical Committee on Control Education
(GEE), IFAC Technical Committee on Coast Oriented Automation (COA), IFAC
Technical Committee on Discrete Event Dynamic Systems (SSD), IFAC Technical
Committee on Modeling and Control on Environmental System (ILE),š IFAC Technical Committee on Robotics (MIR),
IFAC Technical Committee on Social Impact of Automation (GES), IFAC Technical
Committee on Supplemental Ways for Improving Internal Stability (SMW), IFAC
Technical Committee on Transportation (TVT).
During the recent years, within the scope of
its dedication to social responsibility, the IFAC has undertaken this new
series of professional meetings to respond to its best to the historical emergence
of globalization process and its impact on economy, society and technology
world-wide, in general, and developing and small countries, in particular.
The idea to organize a series of Conferences on
Technology Transfer in Developing Countries was initiated in Istanbul, Turkey
during the Annual DECOM Meeting of July 1997, and was based on an initiating
report entitled "A Proposal for Introducing Innovated DECOM activities". The
next year, in July 1998, during the Annual DECOM Meeting in Nantes/France the
south African NMO, SACAC, officially proposed the organization of the first
conference, DECOM - TT 2000 in Pretoria, Republic of South Africa, which was
endorsed by the IFAC and successfully implemented during July 5-7,
2000.Subsequently, the Macedonian NMO, ETAI Society, was endorsed to organize
the second one, DECOM - TT 2001, in Ohrid, Republic of Macedonia. With DECOM -
TT 2001 this series of dedicatedš IFAC
events seems to have gained momentum.
The programme of the workshop included 4 Plenary sessions with 4 plenary papers
and 18 regular sessions with 59 regular papers.
In the course of the Workshop the Meeting of
the IFAC Technical Committee on Developing Countries (DECOM) was held. Meetings
of the IFAC Technical Committee are open by principle so every participant of
the Workshop was welcome to attend the meeting.
Now about scientific and applied components of
the Workshop. Of course the plenary papers were the most interesting and
attracted the most attention.
In the plenary paper "Active Systems - a
Challenge of Contemporary Engineering" the author M.K.Vukobratovic (Serbia and
Montenegro) tries to oppose active systems to contemporary engineering. Under
the contemporary engineering the author keeps in mind passive systems that are
restricted to generating forces in response to local relative motion. But such
a system is not accompanied by the necessary caution steps and adequate
protection measures against possible breakdown and destruction, which in some
specific cases and under extreme conditions could be disastrous. Active systems
possess by hydraulic, pneumatic, electromechanic or magnetic actuators; sensing
devices: accelerometers, force transducers, potentiometers and a feedback
controller to provide control commands for the actuators. Active systems have a
lot of advantages (the author enumerates them) and such evident drawbacks as
complexity, implementation and maintenance costs.
In the article some concrete active systems and
their concrete advantages are considered. For example such active systems as
the adaptation for active noise control; active damping by a force feedback;
vibration structural active control are presented.
The plenary paper by A.L.Fradkov (Russia)
"Control Applications in Physics: from Control of Chaos to Quantum Control" was
devoted to extended summary of the interaction between theoretical physics and
control theory. The author remarks that before the 1990-s this interaction was
not observed as a strong one. A new avenue of research in the borderland
between physics and control was opened by advances in control and
synchronization of chaos. It was discovered by E.Ott, C.Grebogi and J.Yorke
(1990) that even small feedback action can dramatically change the behavior of
a nonlinear system, e.g. turn chaotic motions into periodic ones and vice
versa. The aim of cyber-physical investigation is studying a physical system by
means of controlling it.
In the paper the subject and methodology of
cybernetical physics was outlined. The main ideas and results in the emerging
field of controlling chaotic behavior, in which more than 2000 papers in
peer-received journals were published from 1997 to 2000 was presented in the
paper.
The plenary paper by G.M. .Dimirovski
(Macedonia, Turkey), Yuan-Wei Jing (China), Jun Zhao (China) and Si-Ying Zhang
(China) was titled as "Composite Systems Control by Combined Math-Analytical
and FS/NN Computing Approach". In the paper a control systems engineering approach,
employing a two-level overall system architecture and different but compatible
formalisms for system representation onš
the upper and lower levels that is consistent with most of theoretical
results in systems and control sciences, has been investigated in great many
detail. It encompasses two alternative settings. One design alternative is
based on employing fuzzy-system approximators and solving the adaptive tracking
of given desired output signals. The other alternative is based on state
equations of composite systems and the use of neural-network approximators to
deal with uncertainties and control adaptation. These both methodologies can be
implemented within the standard computer process control technology.
The plenary paper by V.Yu. Rutkovsky, S.D.
Zemlyakov, V.M. Sukhanov and V.M. Glumov "An Approach
to Increasing of Safety Operation of Air and Sea Transportation" (Russia) was
devoted to a new approach of technical condition monitoring of power units of
aircraft and ship engines. In the paper the mathematical model of a
transmission of a turboprop aircraft engine is deduced. The task of turbine's
torque identification with the aim engine control improving and (or) for
control of fatigue deterioration degree of the shaft's material is considered.
The main idea for such a task solution the paper is the estimation of an
elastic shaft torsion angle. For this goal the special adaptive algorithm is
proposed.
Among the 59-th
regular papers was a lot of very interesting ones. Really it is enough only to
name the regular sessions: Manufacturing Automation; Transportation Systems;
Robotic Systems; Sewage and Water Service Systems; Technology Development
Management; Analytical Control System Methodologies; Control Education and
Training; Public Service Building Systems; Intelligent Fuzzy System Methodologies;
Electrical Power Systems; Power Plant Automation and Control; Fault-Diagnosis
and Control; Decision and Management Systems; Miscellaneous Applied Systems;
Intelligent Neural-Network Methodologies; Upgrading Industrial Controls; Signal
and Telecommunications.
The
interesting paper was presented by J. Klamka (Poland) titled as
"Controllability of Nonlinear Systems". In the paper, infinite-dimensional,
continuous-time systems described by certain non-linear abstract differential
equations are considered. Using methods of functional analysis sufficient
conditions for constrained exact local controllability are formulated and
proved. Illustrative example is given. Some remarks and comments on
controllability problems for non-linearš
dynamic systems are presented.
In the paper "Moments
Based Synthesis Approach Comparison with H∞ Design" by
A.Bentayeb, N.Maamri, D.Mehdi and L.Rambault (France) authors deal with a
comparative study between two synthesis methods: H∞ and
moments based approach. Their main objective is to design a controller which
ensures the same performances despite the difference between nominal and real
plant. In the moments synthesis approach it is necessary to choose an
appropriate reference model. The H∞ šsynthesis consists in building weight functions. In the paper on
the example it is shown the equivalence between the choice of a reference model
and the design of the weight functions: for the same required performances,
both methods lead to similar controllers.
M.J.Ameri and M. Kabganian
(Iran) presented the paper "A Novel Approach to Switching Adaptive Control of a
Spacecraft with Time-Varying Uncertainties". The paper proposes a new adaptive
control scheme for non-linear systems containing time-varying uncertainties
with unknown bounded in special case in which the uncertainties vary
exponentially with time. The control law and parameter update law are obtained
from the Lyapunov approach to guarantee the tracking errors converge
asymptotically to zero. Computer simulations are performed to show efficacy of
the proposed schemes.
In the paper "Robust
Mixed H2/H∞ šOptimal Controller Design" by Y.Aydin (Turkey) the author
addresses the problem of dynamic output feedback robust mixed H2/H∞
norm optimal control with regional pole constraints. In the paper mixed H2/H∞
performance index is minimized under the constraint of H2
performance, the constraint of H∞ performance and the regional
pole placement. The synthesis problem is solved via Linear Matrix Inequalities.
It
is necessary to note that in spite of interesting theoretical papers (for
example above mentioned) the majority papers of the Workshop were devoted to
practical problems, more exactly to such a problem how new recent theoretical
results to apply for solving of practical problems. To see this fact it is
enough only to name some papers. For example the paper by H.-H.Erbe (Germany)
"Manufacturing with Low Cost Automation"; the paper by D.Sindel (Turkey)
"Vessel Traffic Management on Bosphorus - An Expert System Approach"; the paper
by V.Sgurev and M.Hadjiski (Bulgaria) "Intelligent Control Integration in Thermal
Power Plants Rehabilitation"); the paper by F.Caliskan and Ch.Hajiyev (Turkey)
"Actuator Failure Detection and Reconfigurable Control for F-16 Aircraft
Model"; and so on.
It seems to me that
the information stated above is enough to attract the attention to the 3-rd
IFAC Workshop DECOM-TT 2003 itself and to preprints of this Workshop which are
available from the Russian participants of the Workshop:
A.L.
Fradkov, Institute for problems of Mechanical Engineering, Russian Academy of
Sciences, St. Petersburg, Russia, Fax: +/-812-321-4766; E-mail:
alf@ccs1.ipme.ru
V.Yu.
Rutkovsky, S.D. Zemlyakov, V.M. Sukhanov and V.M. Glumov, V.A. Trapeznikov Institute
of Control Sciences, Russian Academy of Sciences, Profsoyuznaya 65, 117806,
Moscow, Russia, Tel.: 007 095 3348730; E-mail: rutkov@ipu.rssi.ru ;
zeml@ipu.rssi.ru ; suhv@ipu.rssi.ru ; vglum@ipu.rssi.ru .
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