BrainMap

Octavian Pastravanu

Doctor

Professor - UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Other affiliations

Membru titular al Sectiei IV: Electronica - Automatica - ACADEMIA DE STIINTE TEHNICE DIN ROMANIA (Romania)

Researcher | Teaching staff | Scientific reviewer | PhD supervisor

Academic objectives: Institutional collaboration - training programs in Systems Engineering (Projects with the universities of Vienna, Grenoble, Ghent, Sheffield, Zaragoza, Prague). Scientific developments: (i) CACSD techniques (symbolic computation); (ii) Real-time digital control (self-tuning, procedural knowledge sources); (iii) Alternative approaches to model construction and operation (reinforced learning, meta-modeling, behavioral frameworks); (iv) Static and dynamic neural networks in systems engineering (nonlinear identification and control, classification, recurrent architectures); (v) Event-driven dynamics (system-theoretic framework, deadlock control, flexible manufacturing); (vi) MATLAB-enabled Petri Net Toolbox (MathWorks); (vii) Qualitative theory of dynamical systems (techniques for diagonal stability, set invariance, structural properties - classes of differential / finite-difference systems: positive-, polytopic- , switching-linear, nonlinear with slope conditions).

Web of Science ResearcherID: https://publons.com/researcher/3546087/octavian-pastravanu/

Curriculum Vitae (25/11/2023)

Expertise & keywords

Diagonal stability and flow invariance in control engineering. Techniques specialized for classes of dynamics, encompassed by a unified framework Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-1038 2011 - 2016

Role in this project: Project coordinator

Coordinating institution: Universitatea Tehnica "Gheorghe Asachi" din Iasi

Project partners: Universitatea Tehnica "Gheorghe Asachi" din Iasi (RO)

Affiliation: Universitatea Tehnica "Gheorghe Asachi" din Iasi (RO)

Project website: http://www.ac.tuiasi.ro/~FIDIAS/

Abstract:

The two concepts, “diagonal stability” and “flow invariance”, initially appeared in mathematical researches, but from different areas and with no visible (or predictable) connection between them. Later on, both concepts were transferred to the field of system engineering and their use continued to remain unconnected for a long period. Our project intends to reveal strong connections between the researches separately developed around the two concepts and, relying on these connections, we propose a general scenario able to accommodate (as particular cases) apparently unrelated results. Within this scenario, for both discrete- and continuous time systems, we introduce (as an algebraic propriety) the “diagonal stability relative to an absolute norm” by means of a seminal generalization of Stein and, respectively, Lyapunov inequality. We expect to show that the algebraic property mentioned above is equivalent to a behavioral / dynamical property of the studied system, namely the contractive invariance of the family of sets defined by the considered absolute norm. The intended developments are expected to provide analysis and design techniques for several classes of dynamics, frequently encountered in practical applications (positive systems, switching systems, polytopic systems). Thus the algebraic property becomes the concrete tool for testing (analysis) or allocating (synthesis) various types of invariant set candidates. The MATLAB environment is suitable for implementation.

System dynamics and flow-invariant sets: New conceptual approaches, theoretical and software instruments Call name:
Grant CNCSIS -A COD 255 2005 - 2008

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Affiliation: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Project website:

Abstract:

Mathematical characterization of (absolute) componentwise asymptotic stability, oriented to classes of dynamics – linear with interval-type uncertainties, nonlinear with slope conditions, Hoppfield networks. Software for testing criteria and trajectory simulation. (Coordinator - M. Matcovschi)

Integration of the Petri Net Toolbox with the Simulink environment and development of new software instruments, with wide applicability in studying hybrid dynamics, Universitatea Tehnică Iaşi - Grant CNCSIS tip A, contract nr. 33371/2004, Tema nr. 33, cod CNCSIS – 541, (2004-2007) Call name:
Grant CNCSIS tip A, contract nr. 33371/2004, Tema nr. 33, cod CN 2004 - 2007

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Affiliation: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Project website:

Abstract:

Design and implementation of a Simulink block-set for modeling, simulation and analysis of hybrid systems. The event-driven mechanism relies on the facilities provided by the Petri Net Toolbox for Matlab (third party product of MathWorks - developed at the Technical University of Iasi).

Training laboratory in the field of process digital control – LICAP, Universitatea Tehnică Iaşi - grant 2MU-103, contract 12819/28.09.1998 (1998 - 2002). Financed: The World Bank and The Government of Romania Call name:
grant 2MU-103, contract 12819/28.09.1998 1998 - 2002

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Affiliation: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Project website:

Abstract:

Real-time applications for laboratory setups corresponding to several types of dynamics (electric-drives, fluid systems, thermal equipment). Software developments in RealTime WorkShop for Simulink. Design and implementation of self-tuning algorithms. Use of procedural knowledge sources.

Self-tuning methods for PID algorithms in industrial process control Call name:
Grant 145, contract nr. 7002/97, tema 4 1997 - 1998

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Affiliation: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Project website:

Abstract:

Process monitoring – relay-mode vs. PID-mode. Event-driven supervision of switched mode control. Tuning procedures for regulator parameters. Conversion accuracy and noise effects for the numerical algorithms. Structure and functionality of real-time applications. (Coordinator - M. Voicu)

Applications of artificial intelligence in the control of technical systems Call name:
Grant 480, contract nr. 4002/95, poz. A14 1995 - 1996

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Affiliation: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Project website:

Abstract:

Neural-net models in on-line system identification – dynamic MLP architectures, training accuracy. Pattern learning in reference model control – generation of control actions for specified trajectories. Software developments: design, implementation, testing. (Coordinator - M. Voicu)

Research in Automated Control Theory and Manufacturing - Postdoc Research Project financed by The University of Texas System Call name:
UTA, TX 76019, US Information Agency, Exchange Visitor Facilitat 1993 - 1994

Role in this project: Project coordinator

Coordinating institution: Automation and Robotics Research Institute, The University of Texas at Arlington

Project partners: Automation and Robotics Research Institute, The University of Texas at Arlington ()

Affiliation: Automation and Robotics Research Institute, The University of Texas at Arlington ()

Project website:

Abstract:

Matrix-based system-theoretic framework for event-driven dynamics. Development of Petri-net-based techniques. Deadlock analysis (prediction and prevention strategies / algorithms). Control of flexible manufacturing systems. (Academic year 1993 August – 1994 June).

Research in Nonlinear System Identification and Control - Postdoc Research Project financed by The Gouverment of Belgium Call name:
Ambassade de Belgique, P.07-91.20.10, No 1277 1992 - 1993

Role in this project: Project coordinator

Coordinating institution: Department of Electrical Energy, Systems & Automation, The University of Ghent

Project partners: Department of Electrical Energy, Systems & Automation, The University of Ghent ()

Affiliation: Department of Electrical Energy, Systems & Automation, The University of Ghent ()

Project website:

Abstract:

Neural-network-based techniques for nonlinear system identification and control. Model construction incorporating dynamic neural-net-architectures. Algorithmic, procedural and software developments - environment Neural Network Toolbox for Matlab. (Academic year 1992 October – 1993 July).

Use of databases in expert systems designed for intelligent control of industrial processes Call name:
Contract nr.5026/1992 1992 - 1993

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Affiliation: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI ()

Project website:

Abstract:

Rule-based decision logic model. Hybrid-automaton-based supervision of mode sequencing. Task parallelism – processing quantitative vs. qualitative information. Numerical algorithms and resource allocation management. Design and implementation of real-time software (Coordinator - M. Voicu)

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator
List of research grants as partner team leader
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects