Harro Kiendl

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Portrait of Harro Kiendl
Harro Kiendl

Harro Kiendl (born July 22, 1936 in Hamburg ) is a German natural and engineering scientist . The emeritus professor for control and regulation technology at the University of Dortmund is one of the pioneers in the field of fuzzy control , the systemic development of which began in the 1980s.

family

Harro Kiendl is the son of a senior director and a teacher. In 1968 Kiendl married. The marriage produced a son.

Studies and career

Harro Kiendl graduated from high school in Hamburg in 1955 at Oberalster grammar school . From 1955 to 1962 he studied mathematics , physics , philosophy and education at the University of Hamburg , among others with Emil Artin , Pascual Jordan and Carl Friedrich von Weizsäcker . He also attended lectures in biology . During his studies, he worked as a co-author for the algebraic scientist Emil Artin on two of his lectures as scripts, which students from other universities asked for for years. Furthermore, in 1958, Kiendl interrupted his studies for six months for an industrial internship at Deutsche Shell AG .

In 1959 he passed the preliminary examination in philosophy and pedagogy, and in 1962 the scientific examination in physics and mathematics for the higher teaching post at grammar schools. He did the associated experimental state examination thesis at the Institute for Applied Physics at the University of Hamburg under Heinz Raether , where he also received his doctorate. At this experimental institute, Kiendl used a computer for the first time to analyze measurement data: his computer-aided method made it possible to compensate for the influence of possible inaccuracies in the adjustment of the measuring devices.

After receiving his doctorate in physics in 1966, Kiendl took over the management of the newly established special project Cybernetic Models and System Analysis at the Berlin Pedagogical Center under the educationalist Carl-Ludwig Furck . In the same year, Kiendl got to know the control engineer Gerd Schneider and through him came into closer contact with the subject that was to determine his future career. Funded by a habilitation grant from the German Research Foundation (DFG), Kiendl joined Schneider's chair in 1968, initially at the Technical University of Berlin and then at the Ruhr University in Bochum , where he completed his habilitation in 1971. Two years later he was appointed full professor to the chair for electrical control and regulation in the faculty for electrical engineering at the University of Dortmund (today chair for control systems engineering in the faculty for electrical engineering and information technology, Technical University of Dortmund). In 1990, Kiendl received a call to the Technical University of Hamburg-Harburg. Instead, however, he accepted the offer of the state of North Rhine-Westphalia to stay. In 2001 he retired.

Working in science

One focus of Kiendl's work was the regulation of processes that can be described by a mathematical model. He introduced non-linear controllers with a linear structure in sections and developed methods to demonstrate global system properties such as stability and robustness. His method of convex decomposition, for example, provides such evidence in cases for which there are no purely analytical verification procedures - computer-aided and just as globally known as otherwise only known from purely analytical procedures. For example, it can be shown that all interference deflections of a non-linear control system that are within known limits somewhere in the state space are corrected. In addition, the method serves to prove for a linear system that it is stable for any values ​​of the system parameters within the framework of known uncertainty limits. In both cases, the computer-assisted method clarifies a whole continuum of possibilities without gaps - this is in principle impossible with selective simulations.

The second focus of Kiendl's work relates to processes for which no mathematical model can be established. In order to still be able to control this , the new discipline Fuzzy Control was systematically developed from the 1980s onwards - on the basis of the initially controversial fuzzy logic invented by Lotfi A. Zadeh . Kiendl has made a significant contribution to this. He had recognized that the fuzzy systems of the time could only process positive (recommending), but not negative (warning) rules. Kiendl remedied this deficiency with the patented two-strand fuzzy system with hyperinference and hyperdefuzzification .

He also developed the so-called ROSA method, which allows data-based modeling with positive and negative rules. Kiendl's patented inference filter , torque method and implicit modeling also expanded the potential of fuzzy control. Furthermore, Kiendl developed methods to prove the stability of fuzzy systems.

On the occasion of his 60th birthday, employees and industrial cooperation partners dedicated five articles to Kiendl in the specialist journal at-Automatisierungstechnik on work he initiated. Volker Krebs also paid tribute to him there with a contribution. A year later, Kiendl then presented his method-oriented textbook Fuzzy Control . In it he first introduces the topic and on this basis shows the connection to his new methods.

In order to further develop the complementary methods of fuzzy control, artificial neural networks and evolutionary algorithms (ANN and EA) across the board, the cross-faculty collaborative research center SFB 531 Computational Intelligence (CI) was set up at the University of Dortmund in 1997. Harro Kiendl was a founding member and contributed with two sub-projects and a subsequent transfer project until 2002. In his last essay, Kiendl goes into the further development of the CI and outlines possible future perspectives - and also sees possible applications of the CI in areas that are still often considered the exclusive domains of human abilities.

Working in industry

In cooperation with Friedrich Grohe Armaturenfabrik GmbH & Co in Hemer , Harro Kiendl has played a key role in the product development through seven patents. The cooperation with VEW Energie AG from Dortmund has resulted in patented, more efficient concepts for managing power plants. For many years, Kiendl cooperated with Ruhrgas AG in Essen and Robert Bosch GmbH in Stuttgart , which also resulted in publications .

When the Ministry of Economics, Medium-Sized Enterprises and Technology of North Rhine-Westphalia launched the Fuzzy Initiative NRW, Harro Kiendl was a founding member. As a member of their board of directors, he has been involved in the transfer of fuzzy technology in companies in the state of North Rhine-Westphalia for many years.

From 1991 to 1999, Kiendl headed the Technical Committee 5.22 Fuzzy Control of the VDI / VDE Society for Measurement and Automation Technology (GMA) and organized annual workshops for participants from research institutes and industry.

Articles (selection)

  • Harro Kiendl: A suboptimal control strategy based on Cayley-Hamilton's theorem for the synthesis of scanning systems with limited manipulated variables. In: Regelstechnik, 28, 1980, ISSN 0340-434X, pp. 250-258.
  • Harro Kiendl: Calculation of the Maximum Absolute Values ​​of Dynamical Variables in Linear Control Systems. In: IEEE Transactions on Automatic Control, 27, 1982, ISSN 0018-9286, pp. 86-89.
  • Harro Kiendl: Total stability of linear control systems with imprecisely known parameters of the controlled system. In: Automatisierungstechnik at, 33 (12), 1985, ISSN 0340-434X, pp. 379-386.
  • Harro Kiendl: The concept of invariant order reduction. In: Automation technology at, 34, 1986, ISSN 0340-434X, pp. 465-473.
  • Harro Kiendl: Robustness analysis of control systems using the convex decomposition method. In: Automation technology at, 35, 1987, ISSN 0340-434X, pp. 192-202.
  • Harro Kiendl, Klemens Post: Invariant order reduction by means of transparent parameterization. In: Automation technology at, 36, 1988, ISSN 0178-2312, pp. 92-101.
  • Harro Kiendl, Roland Wibbeke: The chamber model as an instrument for analyzing the controllability of mixed water preparation systems. In: Automation technology at, 37, ISSN 0178-2312, 1989, pp. 326-335.
  • Harro Kiendl, Michael Krabs: A method for generating rule-based models for dynamic systems. In: Automation technology at, 37, 1989, ISSN 0178-2312, pp. 423-430.
  • Harro Kiendl, Martin Fritsch: Extended application of the concept of invariant order reduction. In: Automation technology at, 37, 1989, ISSN 0178-2312, pp. 448-455.
  • Harro Kiendl, Michael Krabs: Design of a Rule-Based Controller for the Inverted Pendulum. In: Dieter Franke, F. Kraus (Ed.): Design Methods of Control Systems. Selected Papers from the IFAC Symposium Zurich 1991. Pergamon Press, Oxford 1992, pp. 503-506.
  • Harro Kiendl, Thomas Scheel: Integral Ljapunov Functions Based on Incomplete State Feedback. In: Dieter Franke, F. Kraus (Ed.): Design Methods of Control Systems. Selected Papers from the First IFAC Symposium Zurich 1991. Pergamon Press, Oxford 1992, pp. 311-315.
  • Harro Kiendl, Jürgen Adamy, Peter Stelzner: Vector Norms as Ljapunov Functions for Linear Systems. In: IEEE Transactions on Automatic Control, 37, 1992, pp. 839-842.
  • Harro Kiendl, Martin Seidel, Ralf Koritzius, Michael work: Invariant order reduction of time-discrete linear systems. In: Automation technology at, 40, ISSN 0178-2312, 1992, pp. 7-14.
  • Harro Kiendl, Johannes-Jörg Rüger: The Design of Nonlinear Controllers and Proof of Stability Using Facet Functions. In: Nieuvenhuis, Praagman, Trentelman (ed.): Proceedings of the second European Control Conference ECC'93 in Gronigen, 1993, pp. 1459-1465.
  • Harro Kiendl: Fuzzy Control - a promising new branch of control technology. In: Automation Technology Practice atp, 35, 1993, pp. 269-270.
  • Harro Kiendl, Johannes Jörg Rüger: Procedure for the design and stability verification of control systems with fuzzy controllers. Automation Technology 41, 1993, pp. 138-144.
  • Harro Kiendl, Michael Krabs, Thomas Scheel: Fuzzy Control in Germany: A Survey. In: Proceedings of Third IEEE International Conference on Fuzzy Systems, 1994, pp. 716-720.
  • Harro Kiendl, Johannes Jörg Rüger: Stability Analysis of Fuzzy Control Systems Using Facet Functions. In: Fuzzy Sets and Systems, 70, 1995, 0165-0114, pp. 275-285.
  • Harro Kiendl, Rainer Knicker, Frank Niewels: Two-way fuzzy controllers based on hyperinference and inference filter. In: Proceedings 2nd World Automation Congress (WAC 96), TSI Press, Montpellier 1996, pp. 387-394.
  • Harro Kiendl. Non-translation invariant defuzzification. In: Proceedings of the Sixth IEEE International Conference on Fuzzy Systems (FUZZ IEEE '97) in Barcelona, ​​IEEE Press, Piscataway, NY 1997, pp. 737-742.
  • Harro Kiendl: Self-organizing adaptive moment-based clustering. In: J. Keller, H. Zimmermann, T. Fukuda (Eds.): Proceedings of the Seventh IEEE International Conference on Fuzzy Systems (FUZZ-IEEE '98), Anchorage, AK, Vol. 2, IEEE Press, Piscataway, NJ . 1998, pp. 1470-1475.

Web links

Individual evidence

  1. ↑ Harro Kiendl: Suboptimal controller with a linear structure in sections. In: Martin Beckmann, Gerhard Goos, Hans-Peter Künzi (Eds.): Lecture Notes in Economics and Mathematical Systems. Vol. 73, Springer Verlag, Berlin / Heidelberg / New York 1972.
  2. ↑ Harro Kiendl, Andreas Michalske: Robustness Analysis of Linear Control Systems with Uncertain Parameters by the Method of Convex Decomposition. In: Mohamed Mansour, Silvano Balemi, Werner Truöl (Eds.): Robustness of Dynamic Systems with Parameter Uncertainties. Birkhäuser Verlag, Basel 1992, ISBN 3-7643-2791-X (Basel), ISBN 0-8176-2791-X , pp. 189-198.
  3. ↑ Lotfi A. Zadeh: Fuzzy Sets. Information and Control , 8, 1965, pp. 338-353
  4. ↑ Patent DE4308083C1: Method for generating manipulated variables at the output of a fuzzy controller and fuzzy controller for this . Registered on March 13, 1993, issued June 1, 1994. Applicant and inventor: Harro Kiendl.
  5. ↑ Harro Kiendl: Decision Analysis by Advanced Fuzzy Systems. In: Lotfi A. Zadeh, Janusz Kacprzyk (Ed.): Computing with Words in Information / Intelligent Systems. Vol. 2. Physica-Verlag, Heidelberg / New York 1999, ISBN 3-7908-1218-8 , pp. 223-242.
  6. ↑ Volker Krebs: Harro Kiendl on his 60th birthday. at - automation technology 44 (1996), doi : 10.1524 / auto.1996.44.8.413 (pdf).
  7. ↑ Harro Kiendl: Fuzzy Control method-oriented. R. Oldenbourg Verlag, Munich / Vienna 1997, ISBN 3-486-23554-0 .
  8. ↑ Hans-Paul Schwefel, Ingo Wegener, Klaus Weinert (eds.): Advances in Computational Intelligence . Springer Verlag, Berlin / Heidelberg 2003
  9. ↑ Harro Kiendl: Computational Intelligence: Patterns of their creation. In: Automation technology at 60, 2012, ISSN 0178-2312, pp. 589-598. doi : 10.1524 / auto.2012.1031
  10. ↑ Harro Kiendl, Tatiana Kiseliova, Yves Rambinintsoa: Use of Fuzzy Strategies for Interpretation of Music. In: Journal of Multiple - Valued Logic & Soft Computing 12, Old City Publishing, Inc., 2006, ISSN 1542-3980, pp. 149-166.
  11. ^ Klaus Linke: Power plant management system at the network level. Structure, development trend, new concepts. Daily energy management issues. Journal for energy industry, law and the environment. 10, 1996, pp. 618-624
personal data
SURNAME Kiendl, Harro
BRIEF DESCRIPTION German natural and engineering scientist
DATE OF BIRTH July 22, 1936
PLACE OF BIRTH Hamburg