Herbert Ehrlich

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Herbert Ehrlich in Magdeburg at the Otto von Guericke University (2008)

Herbert Ehrlich (born January 15, 1932 in Oberschöna near Freiberg ; † October 25, 2019 in Leipzig ) was a German engineer and professor of control engineering . He is one of the pioneers of automation technology and was a co-founder of the training of qualified engineers in the field of automation technology.

Career

Herbert Ehrlich was born in Oberschöna in what is now the district of Central Saxony near Freiberg in Saxony . After finishing school he began to learn the trade of a precision mechanic in 1946 . He then attended the Workers and Farmers Faculty (ABF) at what was then the TH Dresden , from which he graduated in 1953 with the Abitur .

In 1953 he began studying at the Technical University of Dresden , Faculty of Mechanical Engineering, in the basic course of mechanical engineering , which he continued after completing his intermediate diploma in 1956 with the subsequent main course of control engineering at the newly founded Institute for Control Engineering (Director: Heinrich Kindler ) in 1955 . This institute was the first of its kind in the entire German-speaking area, and Herbert Ehrlich belonged to the first generation of students at this institute, from which Professors Hans-Joachim Zander (Dresden) and Wolfgang Weller (Berlin) also emerged, and he was also a research assistant this institute with the later Professor Heinz Töpfer (Magdeburg / Dresden). With a thesis on system analysis of pneumatic elements he has here in 1959 his first degree graduate engineer (Dipl.-Ing.) In the well control technology acquired.

The 1953 matriculation was particularly striking and has therefore remained unforgotten, so that Herbert Ehrlich wrote a contribution about it in which he recalls the last lecture, which was even the reason for founding his own brass band.

As a scientist in Magdeburg

Traditional building for control technology, later automation technology on the campus of Otto von Guericke University Magdeburg

Ehrlich moved to the Technical University Otto von Guericke Magdeburg (THM) as a scientific assistant at the Institute for Control Engineering . He was thus the first assistant to this institute founded by Heinrich Wilhelmi in the spring of 1960. Ehrlich played a key role in building up this facility and the training in control technology in Magdeburg .

In his scientific work at that time he dealt with experimentally supported investigations on industrial pneumatic controllers in stack construction. He obtained his doctorate with a dissertation on this subject in 1966. With this qualification he was able to take up the position of senior assistant in 1967 .

His professional reorientation began with a study visit to the Kiev Polytechnic Institute (KPI) in 1968 and 1969. Under the guidance of Professor Kunzevich from the Institute for Cybernetics of the Academy of Sciences of Ukraine Ehrlich dealt with pulse-width modulated time-optimal controls. His habilitation thesis, which he completed in 1977, was created on this basis .

After his return from Kiev he was appointed as a university lecturer at the TH Magdeburg (equivalent to C3 professor ). Here he also took over the management of the research area "Control engineering and process control" (WB 3) within the section "Technical cybernetics and electrical engineering" (Director: Heinz Töpfer ). Ehrlich held this position until 1973.

Work as a professor in Leipzig

Leipzig, Wächterstrasse 13, former building of the TH Leipzig for the two sections of automation systems and electrical energy systems, today Wiener-Bau : Faculty building of the HTWK Leipzig

In 1975 Herbert Ehrlich was appointed professor for control engineering and automation technology at what was then the Leipzig Engineering University, which two years later became part of the newly founded Technical University of Leipzig (THL). Here the “Automation Systems” section has been gradually rebuilt, with Herbert Ehrlich taking over the development and management of the “Control Engineering” research area (Section Director: Werner Richter ). Ehrlich was also a member of the Section Council.

By 1990, with a staff of 120 employees, around 30 doctoral students, 60 staff positions in the industrial-university complex system automation (IHK) as a transfer facility and approx. 500 students in Leipzig, one of the largest higher education institutions in the entire German-speaking area with an exclusive specialization in automation technology . This made possible Herbert Ehrlich, together with the other five chairs of Werner Richter , Rainer Müller , Dietrich Balzer , Werner Kriesel and Hans-Günter Woschni for all main components of automation systems, also extensive research projects with the automation industry as well as with the Academy of Sciences of the GDR , central institute for Cybernetics and Information Processes (ZKI) in Dresden (Head: Hans-Joachim Zander ).

In his scientific work, Ehrlich has made a name for himself since then in the field of discrete-continuous systems, in which connections between logical elements and dynamic subsystems are relevant. Despite the given technical feasibility with programmable logic controllers (PLCs), there were no uniform design tools that could be handled by engineers. Because of their mutual influence, Ehrlich aimed at a common design for this system class. He has initiated numerous scientific papers on this, some of which were supervised as dissertations. As an essential result, he presented a compact representation with structure matrices, which is based on the state space representation and whose elements are only 0 or 1 and which can be controlled.

Further areas of interest were the fuzzy regulations as well as the "history of measurement, automation and control technology", which was mainly worked on by the doctorate pedagogue Hans Rohr , who in 1996 co-founded the "Automatic Museum Leipzig".

After German reunification in 1990, what had previously been the “Automation Systems Section” was formed into a “Electrical Engineering Department” in 1991, which also included an “Institute for Control Engineering”, in which Ehrlich continued to work. In 1992 the University of Technology, Economics and Culture (HTWK) was newly founded as a legally independent institution (founding rector: Klaus Steinbock ) and can de facto be regarded as the successor of the TH Leipzig with slightly restricted rights. The closure of five of the eight existing technical universities in Saxony at that time was primarily due to financial policy reasons, after all universities and colleges had passed into state responsibility with reunification. The TH Leipzig was closed over a period from 1992 to 1996 in order to be able to complete all university courses on site as planned. This meant that TH degree courses had to be supervised parallel to HTWK degree courses in the existing local conditions. During this time, the professors Herbert Ehrlich, Klaus-Peter Schulze and Werner Kriesel were increasingly deployed in order to be able to properly carry out and complete diploma procedures as well as ongoing doctorates at the THL. Herbert Ehrlich continued his control engineering training in the newly created Institute for Measurement, Control and Regulation Technology until he retired at the end of 1996.

The tradition-steeped Leipzig automation profile has been updated since 1992 and organized within the structural framework of a faculty with corresponding institutes for teaching and research.

The following professors emerged from Herbert Ehrlich's academic environment : Günter Stein (HTWK), Klaus-Peter Schulze (HTWK), Manfred Lohöfener ( HS Merseburg ), Markus Krabbes (HTWK), Andreas Pretschner (HTWK), Hendrik Richter (HTWK) , Jens Jäkel (HTWK), Ines Rennert (University of Telecommunications Leipzig), Daniela Döring (Brandenburg Technical University Cottbus-Senftenberg) and others

Memberships and honors

Herbert Ehrlich has worked in specialist organizations such as the Scientific and Technical Society for Measurement and Automation Technology (WGMA) within the Chamber of Technology (KDT) Berlin and the Association of German Engineers (VDI) Düsseldorf . In the Leipzig district association of the VDI, he was a co-founder of the measurement and automation technology working group. As chairman, he also organized monthly scientific and technical colloquia, which were very popular in the Leipzig region.

Herbert Ehrlich's contributions to training, further education and research in the field of control engineering and control theory were honored with an honorary colloquium on January 15, 1997, his 65th birthday, as part of the 46th Leipzig Electrotechnical Colloquium. At the same time, his active professional life was ceremoniously ended (his employment at the HTWK Leipzig formally ended with the expiry of the TH Leipzig on December 31, 1996).

Publications (selection)

  • Contribution to the analysis of the dynamic behavior of pneumatic PID controllers in stack construction - with special consideration of the coupling between the setting parameters and the controller parameters. Dissertation, TH Magdeburg, Faculty of Electrical Engineering, Magdeburg 1966.
  • Herbert Ehrlich; Werner Kriesel : Calculation and experimental investigation of adjustable throttles of the cone-cone and cone-cylinder type. measure, control, regulate, Berlin vol. 9 (1966) No. 1, pp. 21-29.
  • Herbert Ehrlich; Werner Kriesel ; S. Körber: Actuators with stepper motors and their coupling to the controller and process computer. measure, control, regulate / automatisierungspraxis, Berlin Jg. 17 (1974) Part I: No. 5, pp. 117-120 and Part II: No. 9, pp. 213-216.
  • Contribution to the design and implementation of control and regulation systems with pulse width modulation of the control signal. Habilitation thesis (dissertation B), Technical University of Magdeburg, Scientific Council, Magdeburg 1977.
  • Herbert Ehrlich (scientific director and publisher): 6th International Scientific Conference on Plant Automation 1990, Topic 2: Process Automation. Scientific reports of the Technical University of Leipzig, H. 3. Publisher: Rector of the TH Leipzig, 1990.
  • Herbert Ehrlich: Yes, the 1953 matriculation certificate, it will not be forgotten. CONTACT - online. The graduate magazine of the TU Dresden, issue 3/2010.

literature

  • Dietrich Werner, D. Herrmann: msr introduces: Technical University of Leipzig - Automation Systems Section. In: msr - measure, control, regulate, Berlin. Vol. 26, 1983, No. 9, pp. 527-531.
  • Herbert Ehrlich on his 65th birthday. Automation technology, Munich. Vol. 45, 1997, No. 6, pp. 299-300.
  • Karl Heinz Fasol ; Rudolf Lauber; Franz Mesch; Heinrich Rake ; Manfred Thoma ; Heinz Töpfer : Great Names and the Early Days of Control in Germany. In: Automation technology, Munich. Vol. 54, 2006, No. 9, pp. 462-472.
  • Kurt Reinschke: Remembering Heinrich Kindler , first professor for control engineering at the TH Dresden . In: Automation technology, Munich. Vol. 58, 2010, No. 06, pp. 345-347.
  • Hans-Joachim Zander , Georg Bretthauer : Prof. Heinz Töpfer on his 80th birthday. In: Automation technology, Munich. Vol. 58, 2010, No. 7, pp. 413-415.
  • Wolfgang Weller : Automation technology through the ages - development history of a fascinating subject . Publisher epubli GmbH Berlin, 2013, ISBN 978-3-8442-5487-7 .
  • Peter Neumann : Automation technology at the Magdeburg alma mater. In: Mechanical and plant engineering in the Magdeburg region at the beginning of the 21st century. Future based on tradition. Delta-D publishing house, Axel Kühling, Magdeburg 2014, pp. 215-219, ISBN 978-3-935831-51-2 .
  • Peter Neumann : University education with automation profile from 1950 to 1990. In: Peter Neumann (Hrsg.): Magdeburg Automation Technology in Transition - From Industry to Research Location. Authors: Christian Diedrich , Rolf Höltge, Ulrich Jumar , Achim Kienle , Reinhold Krampitz, Günter Müller, Peter Neumann, Konrad Pusch, Helga Rokosch, Barbara Schmidt, Ulrich Schmucker, Gerhard Unger, Günter Wolf. Otto von Guericke University Magdeburg ; Institute for Automation and Communication Magdeburg (ifak), Magdeburg 2018, pp. 114–131, ISBN 978-3-944722-75-7 .

Individual evidence

  1. ↑ Wolfgang Weller : Automation technology at a glance . Beuth Verlag Berlin, Vienna, Zurich 2008, ISBN 978-3-410-16760-0 and as an e-book.
  2. ^ Winfried Oppelt : Small manual of technical control processes. Verlag Chemie, Weinheim 1954, 5th edition Verlag Chemie, Weinheim and Verlag Technik, Berlin 1972. ISBN 3-527-25347-5 .
  3. ↑ H. Haas, E. Bernicke, H. Fuchs, G. Obenhaus (overall editor): ursamat manual , published by the Berlin Institute for Automatic Control. Verlag Technik, Berlin 1969.
  4. ↑ Lothar Starke: From hydraulic regulators to process control systems. The success story of the Askania works in Berlin and the device and controller works in Teltow. 140 years of industrial history, tradition and future . Berliner Wissenschafts-Verlag, Berlin 2009, ISBN 978-3-8305-1715-3 .
  5. ^ Karl Reinisch : Cybernetic basics and description of continuous systems . Verlag Technik Berlin 1974.
  6. ↑ Wolfgang Weller ; Heinrich Wilke: Programmable control devices. Automation technology series, Vol. 181. Verlag Technik Berlin 1979.
  7. ↑ Wolfgang Weller : The system technology as an innovative concept. Books on Demand GmbH, Norderstedt, 2008, ISBN 978-3-8370-5748-5 [1] and as an e-book.
  8. ↑ Ulrich Korn : Basics of the description of the state of control systems. Scientific-Technical Society for Measurement and Automation Technology (WGMA) in the Chamber of Technology (KDT), autumn courses in technical cybernetics, Berlin 1970.
  9. ↑ Ulrich Korn ; Ulrich Jumar : PI multivariable controller - practical design, robustness, application. Oldenbourg Verlag, Munich; Vienna 1991, ISBN 3-486-21720-8 .
  10. ↑ Hans-Joachim Zander : Control of event-discrete processes. Novel methods for describing processes and designing control algorithms. Springer Vieweg Verlag, Wiesbaden 2015, ISBN 978-3-658-01381-3 , e-book ISBN 978-3-658-01382-0 .
  11. ^ Werner Kriesel : Automatic Museum in Leipzig. In: Association of German Engineers, VDI / VDE-GMA (Hrsg.): Yearbook 1997 VDI / VDE-Gesellschaft Mess- und Automatisierungstechnik. VDI-Verlag, Düsseldorf 1997, ISBN 3-18-401611-0 , pp. 447-449.
  12. ↑ Werner Kriesel ; Hans Rohr; Andreas Koch: History and future of measurement and automation technology . VDI-Verlag, Düsseldorf 1995, ISBN 3-18-150047-X .
  13. ^ Günter Stein et al .: Control engineering with CADCS. In the! SWITCH ON series with teaching material and a simple design process on CD-ROM. Specialized book published by Carl Hanser Verlag, Leipzig / Munich 1998, ISBN 3-446-19169-0 .
  14. ^ Tilo Heimbold : Introduction to automation technology. Automation systems, components, project planning and planning. Specialist book publisher at Carl Hanser Verlag, Leipzig; Munich 2015, ISBN 978-3-446-42675-7 , e-book ISBN 978-3-446-43135-5 .
personal data
SURNAME Honestly, Herbert
BRIEF DESCRIPTION German engineer and professor for control engineering / automation technology
DATE OF BIRTH January 15, 1932
PLACE OF BIRTH Oberschöna
DATE OF DEATH October 25, 2019
Place of death Leipzig