Cristian FluturPhD
areas of expertise
- Linear Systems
- Signal Processing
- Automatic Control
- Machine Learning
- Descriptor Systems
education
- Ph.D, POLITEHNICA University Bucharest
- MSc, Advanced Automatics
- BSc, Automatic Control and Computer Science
Cristian Flutur conducts his research at the Department of Automatic Control and Systems Engineering, Faculty of Automatic Control and Computers. He obtained his Ph.D. in Systems Engineering in 2018 with a thesis titled “Factorization Techniques for the Regulation of Generalized Systems.” His doctoral research focused on descriptor-type systems with singularities, described by improper or polynomial transfer matrices. He has achieved original results in the fundamental research of singular systems, with key contributions including the simultaneous squaring down of zeros and singular structure, minimal spectral factorization, and Wiener-Hopf type factorization. Recently, Cristian Flutur introduced the Machine Learning Techniques course in the Systems Engineering undergraduate program, where he serves as the course coordinator.
AI should be human-centered, considering the interdisciplinary aspects, oriented to empowering human specific features (creativity, intuition, understanding, consciousness), considering humanities (philosophy, psychology, ethics, aesthetics, and art), and integrating symbolic and connectionist (deep neural networks) paradigms.
Dr. Cristian Flutur is the head of the Dynamic Systems Laboratory in the Department of Automatic Control and Systems Engineering, where he has coordinated various student practice activities. These have resulted in research reports, numerical algorithm software packages, and interactive Matlab graphical interfaces. Some of these activities have extended into bachelor’s and master’s theses with practical applications in sound recognition and quadcopter control.
Cristian Flutur has been an associate professor in the Department of Automatic Control and Systems Engineering since 2018. As of June 2024, he serves as the Vice Dean of the Faculty of Automatic Control and Computers, responsible for international relations.
His main research achievements are as follows:
Simultaneous Squaring Down and Zero Cancellation:
Cristian Flutur investigated and solved the problem of simultaneous squaring down of zeros and singular structure for generalized systems. He parameterized classes of all static and dynamic compensators with minimal McMillan degree and obtained compensators that preserve the L-2 and L-infinity norms of the original system.
- Cristian Oară, Cristian Flutur, Marc Jungers. “Squaring down with zeros cancellation in generalized systems.” Systems Control Letters, 92: 5 – 13, 2016 – Q1 (red zone)
- C. Flutur and C. Oară. “Simultaneous squaring down and zeros cancellation in linear systems.” Control Systems and Computer Science (CSCS), 2015 20th International Conference on, pages 915–922. IEEE, 2015 (first author)
Minimal and Nonminimal Factorizations:
Cristian Flutur addressed the problem of spectral factorization. He introduced the concept of a replicative beam of zeros, enabling the correct deflation of the infinite zero structure, avoiding issues caused by the non-isomorphic correspondence between the rational canonical invariants and the Kronecker canonical structure of the system’s beam. In the non-minimal case, he extended the Wiener-Hopf factorization (previously applicable only to biproper systems) to polynomial, strictly proper, or improper systems.
- C. Flutur, C. Oară. “Minimal factorization for transfer matrices of generalized systems.” System Theory, Control and Computing (ICSTCC), 2014 18th International Conference, pages 13 – 18. IEEE, 2014 (first author)
- C. Oară, C. Flutur. “Nonminimal Spectral Factorization of a Descriptor System.” CEAI, Vol.12, No. 2, pp. 10-16, 2010
Cristian Flutur was a principal researcher in a series of fundamental research projects with national funding, the most relevant being “New Solutions for the Nonlinear Output Regulation Problem” (TE232/2010). In this project, Cristian Flutur investigated the problem of nonlinear state observers and proposed a new normal form, applicable to square non-linear MIMO systems.
- A. Udrea, A. Țiclea, C. Flutur, and V. Tănasă. “On the nonlinear output regulation problem – part 1 – mimo nonlinear systems normal forms and a discussion on the necessary conditions for solving the control problem.” U.P.B. Sci. Bull., Series A, 74(4):3–16, 2012
Top publications
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