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The Research Institute of Electrical Engineering (IIIE) "Alfredo Desages" has been created as an initiative of the Faculty of the Department of Electrical Engineering and Computers (DIEC) at the Universidad Nacional del Sur (UNS). More specifically, the University Assembly of the UNS issued the resolution 17/1997 to recognize formally the activities of the institution. Since 2007, IIIE has been integrated in the Technological and Research Center of CONICET in Bahia Blanca (CCT-CONICET-BB for short) as dual partner institute belonging to UNS-CONICET.
The scientific and technological development now depends heavily on the coordination of interdisciplinary activities following common objectives. The objectives of the institution consist to strength the activities of science and technology in the University in order to promote the universal knowledge and the application of the technology and innovation with the purpose to increase the production of goods and to improve the quality of life of the society.
Contribute significantly to improve the quality of life and its sustainability by creating new knowledge through research and development (R+D) projects and cutting edge innovation. Also, provide the state of the art to the related under-graduated and graduated academic activities in a wide range of skills.
Identify, with deep and wide perception and based on a methodic prospective exercise, the regional, national and international needs of R+D in which the institute can address the efforts of the research groups.
Combine the skills of academia and the public and private sectors in collaborative projects that enhance the interaction of academia and industry.
Be a reference center at national and international levels in research, development and innovation serving regional, national and global importance problems requiring knowledge, creative and innovative solutions in our areas of expertise. Helping also to improve the quality of life and sustainability.
Executive actions are done by the Director of the Institute supported in their decisions by the Council.
The Director is the institutional responsible of the research unit, being in charge of the functioning the UNS-CONICET regulations. He presides over the Council and is charged with responsibility of administration and management of the human and economic resources.
The Council is involved in determining priorities, work plans and general guidelines of operation of the research unit. It collaborates with the Director in preparing the Annual Memory report of the institute, where the performance of the institution on the basis of relevant production indicators should be reflected.
It is composed of eight members of the research unit and it is chaired by the Director of the Institute. Six of the elected research are renewed by halves every 2 years, lasting 4 years in their functions. One member is an auxiliary technical staff, renewed every 4 years, while another member is a graduate PhD student, renewed every 2 years. The Council defines the lines of action to follow, the organization and institutional growth, the promotion of research activities and training of the personnel.
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He held the Electrical Engineer diploma at Universidad Nacional del Sur in 1971. He was a full professor of the Department of Electrical Engineer in 1987 (Assistant Prof., 1977, Associated Prof., 1983). He was a fellow researcher (in the top category) of the Scientific Research Commission of Province of Buenos Aires (Argentine).
He not followed postgraduate studies neither went to foreign institutions to look for alternative professional perspectives. Since the beginning he was his own teacher, scholar and advisor. In that way he created a model of excellence in the practice of university teaching, following it coherently until his lasts days. Gradually, he was projecting his experiences to new disciples, based initially on bachelor (Electronic Eng.) final thesis projects, to evolve rapidly towards research and postgraduate education.
Prof. Desages published more than 50 scientific articles in top periodic journals (see Annex I) on topics such as: nonlinear control systems, system stability, optimization, bifurcation and chaos, digital filtering, signal processing and theory of circuits among others.
Over 20 years of professional practice, he has formed a large number of disciples who excel both at home and abroad today (see Annex II). He advised the activities of more than 16 graduate students in less than 15 years of activity. He was the first Director of the Doctoral Program in Control Systems in Argentina and was the advisor of at least six doctoral thesis (including the first graduated O. Agamennoni in 1991) .
Alfredo was very active in academic committees especially in matters of graduate studies and science and technology. He always had in mind the creation of graduate programs of excellence and his collaboration was essential for the establishment of Graduate Studies in the Department of Electrical Engineering at UNS. In 1987 he participated actively in a group, together with other academic units at the University of La Plata and San Juan, working to organize a graduate degree in Control Systems, a project that did not materialize due to lack of budget. A few years later he succeeded in establishing MSc and PhD programs in Control Systems in the Department of Electrical Engineering of the UNS. In 1995, these programs received A level by the CAP and in 1999 and 2012 by CONEAU.
Since the first beginnings in 1985, he participated in the adventure born from the enthusiasm of a group of academics as those participating of the RPIC meeting (Workshop on Information Processing and Control). This meeting has grown and has had a marked importance in bringing together those who have concerns in academia and research in those fields.He will always be remembered by the students of Electrical Engineering, for his so clearly way to explain the principles of convolution, frequency response and some rudiments of the theory of nonlinear circuits from his chair of Circuit Theory I. In the early 80s he began to dictate issues and stability analysis of nonlinear systems in the chair of Circuit Theory III.
The inheritance of Alfredo Desages is a prominent research group in systems and control, all its scientific work, the whole of his disciples and everything he created and motivated at UNS, beyond its physical presence.
[1] Rotstein H., Romagnoli, J., Doñate P. D., Desages A. C., "A new approach to linear model reduction in frequency domain". Applied Modelling and Simulation of Technological Systems. North Holland Publishing Company. Ed. P. Borne y S. Tzafestas, pp. 183-190, (1987).
[2] Agamennoni O., Desages, A. C., Romagnoli J. "Adaptive control scheme for SISO processes with delays". Ind. Eng. Chem. Res., vol. 26, pp. 774 - 781, (1987).
[3] Agamennoni, O., Desages, A. C., Romagnoli J. "Robust controller design methodology for multivariable chemical processes". Chemical Engineering Science, vol. 43, no. 11, pp. 2937-2950, (1988).
[4] Romagnoli J., Karim O., Agamennoni O., Desages A. C. "Controller design for model-plant parameter mismatch". IEE Proceedings, Part D: Control Theory and Applications, vol. 135, no. 2, pp. 157-164, (1988).
[5] Desages, A. C., Bortolotto G., Romagnoli J. "On the statistical treatment of material balances". Latin American Applied Research, vol. 18, no. 1, pp. 31-42, (1988).
[6] Rotstein, H. P., Desages A. C., Romagnoli J. "Calculation of highly structured stability margins". International Journal of Control, vol. 49, no. 3, pp. 1079-1092, (1989).
[7] Rotstein, H. P., Desages, A. C., Romagnoli, J. A. "Robustness considerations in reduced order models". IEEE Transactions on Automatic Control, vol. 34, no. 4, pp. 457-459, (1989).
[8] Colantonio, M. C., Moiola, J., Desages, A. C., Romagnoli, J. "Hopf bifurcation in a CSTR using characteristic loci". Chemical Engineering Science, vol. 44, no. 3, pp. 595-602, (1989).
[9] Agamennoni, O., Rotstein, H., Desages, A. C., Romagnoli J. "Robust controller design methodology for multivariable processes with structured perturbations". Chemical Engineering Science, Vol. 44, No. 11, pp. 2597-2605, (1989).
[10] Bortolotto, G., Desages, A. "Multivariable adaptive optimal control of a chemical reactor with constrained inputs". Latin American Applied Research, vol. 19, pp. 171-177, (1989).
[11] Bortolotto, G., Desages, A. C., Romagnoli J. "Automatic tuning of PID controllers through response optimization over a finite time horizon". Chemical Engineering Communications. vol. 86, pp. 17-29, (1989).
[12] Moiola, J., Colantonio, M. C., Desages, A. C., Romagnoli J. "Bifurcations and degeneracies in a CSTR with reactions A® B® C: Frequency domain analysis", Chemical Engineering Science. vol 45, no. 1, pp. 297-305, (1990).
[13] Rotstein, H., Bandoni, A., Desages, A. C., Romagnoli J. "Mathematical programming with linear uncertain constraints- Application to robust control". Computers & Chemical Engineering, vol. 14, no. 4/5, pp. 373-379, (1990).
[14] Bandoni A., Rotstein H., Desages, A. C., Romagnoli J. "Necessary and sufficient conditions for robust stabilization with fixed order conditions". C-TAT, Control Theory and Advanced Technology, vol. 6, no. 1, pp. 75-91, (1990).
[15] Moiola J., Desages A., Romagnoli J. "Bifurcations in chemical reactors via feedback system theory". Chemical Engineering Science. vol. 45, no. 7, pp. 1863-1874, (1990).
[16] Moiola, J., Castro, L., Cendra, H., Desages, A. C. "Degenerate bifurcations and catastrophe sets via frequency analysis". Dynamics and Stability of Systems, vol. 5, no. 3, pp. 163-181, (1990).
[17] Colantonio, M. C, Padín, M., Desages, A. C., Romagnoli, J. A. "Application of higher order bifurcation formulas". IEEE Transactions on Automatic Control, vol. 36, no. 6, pp. 746-749, (1991).
[18] Moiola, J. L., Desages, A. C., Romagnoli, J. "Computing bifurcation points via characteristic gain loci". IEEE Transactions on Automatic Control, vol. 36, no. 3, pp. 358-362, (1991).
[19] Desages, A. C., Castro, L., Cendra, H. "Distance of a complex coefficient stable polynomial from the boundary of the stability set". Multidimensional Systems and Signal Processing, vol. 2, pp. 189-210, (1991).
[20] Moiola, J., Desages, A. C., Romagnoli, J. "Degenerate Hopf bifurcations via feedback system theory: Higher-order harmonic balance". Chemical Engineering Science, vol. 46, no. 5/6, pp. 1475-1490, (1991).
[21] Rotstein, H., Desages, A. C., Figueroa, J., Romagnoli, J. "Improved robustness measures for stability margins in time domain". Latin American Applied Research, vol. 21, no. 1, pp. 39-45, (1991).
[22] Moiola, J., Desages, A. C., Romagnoli, J. "Catastrophes, bifurcations and degeneracies via feedbach system theory". Latin American Applied Research, vol. 21, pp. 77-92, (1991).
[23] Figueroa, J., Agamennoni, O., Desages, A. C., Romagnoli, J. "Robust multivariable controller design methodology: Stability and performance requirements". Chemical Engineering Science, vol. 46, no. 5/6, pp. 1299-1310, (1991).
[24] Figueroa, J., Desages, A. C., Romagnoli, J., Palazoglu, A. "Highly structured stability margins for process control systems: A case study of decoupling control in distillation". Computers & Chemical Engineering, vol. 15, no. 7, pp. 493-502, (1991).
[25] Rotstein, H., Sánchez Peña, R., Bandoni, A., Desages, A. C., Romagnoli, J. "Robust characteristic polynomial assignment". Automatica, vol. 27, no. 4, pp. 711-715, (1991).
[26] Bortolotto, G., Desages A. C., Romagnoli J. "Optimal tuning of discretes PID controllers using Lyapunov's direct method: Robustness analysis". Chemical Engineering Communications, vol. 109, pp. 1-18, (1991).
[27] Robledo, C., Desages, A. C., Cendra, H. "On the distance to the instability border of Hurwitz polynomials with coefficients that depend affinely on m parameters and a particular convexity property of Hn". Multidimensional Systems and Signal Processing, vol. 3, pp. 45-61, (1992).
[28] Agamennoni, O., Paolini, E., Desages, A. C. "On robust stability analysis of a control system using Laguerre series". Automatica, vol. 28, pp. 815-818; (1992).
[29] Paolini, E., Romagnoli J., Desages A., Palazoglu A. "Approximate models for control of nonlinear systems". Chemical Engineering Science, vol. 47, no. 5, pp. 1161-1171, (1992).
[30] Figueroa, J., Desages, A. C., Romagnoli, J., Palazoglu, A. "Controller order reduction for process control systems". Computers & Chemical Engineering, vol. 16, no. 6, pp. 593-603, (1992).
[31] Agamennoni, O., Desages A., Romagnoli J. "A multivariable delay compensator scheme". Chemical Engineering Science, vol. 47, no. 5, pp. 1173-1185, (1992).
[32] Bortolotto, G., Romagnoli, J., Desages, A. C. "Robust performance determination in the presence of plant uncertainties - A polynomial approach". Computers & Chemical Engineering, vol. 16, pp. S173-S180, (1992).
[33] Figueroa, J. L., Desages A. C., Palazoglu A., Romagnoli J. A., "Trade-offs in robust controller design". International Journal of Control, vol. 58, no. 6, pp 1265-1278. (1993).
[34] Figueroa, J. L., Rotstein H., Desages A. C., Romagnoli J., "An algorithm for controller reduction with performance and stability requirements". C-TAT Control Theory and Advanced Technology, vol. 9, no. 3, pp. 671-689, (1993).
[35] Chiacchiarini, H. G., Moiola, J. L., Desages, A. C. "On the complex dynamic behaviour in nonlinear systems with delay". Chaos, Solitons and Fractals, vol. 6, pp. 83-87, (1995).
[36] Chiacchiarini, H., Desages, A. C., Romagnoli, J., Palazoglu, A. "Variable structure control with a second-order sliding condition: Application to a steam generator". Automatica, vol. 31, no. 8, pp. 1157-1168, (1995).
[37] Colantonio, M. C., Desages, A. C., Romagnoli, J., Palazoglu, A. "Nonlinear control of a CSTR: disturbance rejection using sliding mode control". Industrial and Engineering Chemistry Research, vol. 34, no. 7, pp. 2383-2392, (1995).
[38] Jordán, M.A., Desages A. C., Padín, Z. "Identification of stable plants using discrete-time Laguerre series with robustness margins". Latin American Applied Research, vol. 25/S, pp. 11-16 (1995).
[39] Agamennoni, O., Figueroa, J. L., Desages, A. C., Palazoglu, A., Romagnoli, J. "A loop- shaping technique for feedback control design". Computers & Chemical Engineering, vol. 20, no. 1, pp. 27-37, (1996).
[40] Desages, A. C., Paolini, E., Bortolotto, G., "On the stability of the convex combination of two Hurwitz polynomials". Latin American Applied Research, vol. 26, pp. 55-62, (1996).
[41] Desages, A. C., Colantonio, M. C., Chen, G. "Matching conditions for stability analysis of nonlinear feedback control systems". Mathematical and Computer Modelling, vol. 23, no. 10, pp. 1-10, (1996).
[42] Figueroa, J., Desages A. C., Romagnoli J. "Steady-state back-off calculation: Use of piecewise lineal approximation". Computers & Chemical Engineering, vol. 20, Suppl., pp. S527-S532, (1996).
[43] Sentoni, G., Agamennoni, O., Desages, A. C., Rogmanoli J. "Approximate models for nonlinear process control". AIChE Journal, vol. 42, no. 8, pp. 2240-2250, (1996).
[44] Moiola, J. L., Chiacchiarini, H., Desages, A. C. "Bifurcations and Hopf degeneracies in nonlinear feedback systems with time delay". International Journal of Bifurcation and Chaos, vol. 6, no.4, pp.661-672, (1996).
[45] Calandrini, G., Castro, L., Paolini, E., Desages, A. C. "Ritt's algorithm, Grobner basis and discretization". Mathematical and Computer Modelling, vol. 26, no. 5, pp 67-77, (1997).
[46] Chen, G., Desages A. C., Julián P. "Trajectory tracking and robust stability for a class of time-delayed flexible-joint robotic manipulators". International Journal of Control, vol. 68, no. 2, pp. 259-276, (1997).
[47] Julián, P. Jordán, M., Desages, A. C. "Canonical piecewise linear approximations of smooth functions". IEEE Transactions on Circuits and Systems - Part 1, vol. 45, no. 5, pp. 567-571, (1998).
[48] Figueroa, J. L., Desages A. C. "Use of piecewise linear approximations for steady-state back - off analysis". Optimal Control Applications & Methods, vol. 19, no. 2, pp. 93-110, (1998).
[49] Julián, P., Desages, A. C., Agamennoni, O. "High level canonical piecewise linear representation using a simplicial partition". IEEE Transactions on Circuits and Systems – Part I, vol. 46, no. 4, pp. 463-480, (1999).
[50] Julián, P., Guivant, J, Desages, A.C. "A Parametrization of piecewise linear Lyapunov functions via linear programming". International Journal of Control, vol. 72, no. 7/8, pp. 702-715, (1999).
[51] Cendra, H., Desages, A. C., Torresi, A. "Even and odd sections of the set of Hurwitz polynomials". Latin American Applied Research, vol. 29, no. (3/4), pp. 251-258, (1999).
[52] Castro, L., Julián, P., Agamennoni, O., Desages, A. C. "Wiener modelling using canonical piecewise linear functions". Latin American Applied Research, vol. 29, no. (3/4), pp. 265-272, (1999).
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