astronomy

Karl Henrik Johansson

Karl Henrik Johansson is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Karl Henrik Johansson rather than just read about it. In short: Karl Henrik Johansson (born 1967 in Växjö, Sweden) is a Swedish researcher and best known for his pioneering contributions to networked control systems, cyber-physical systems, and hybrid systems. His research has had particular application impact in transportation, automation, and energy networks.

Key takeaways

Karl Henrik Johansson belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Karl Henrik Johansson to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Karl Henrik Johansson from memory before moving on to harder problems.

Reference excerpt

Karl Henrik Johansson (born 1967 in Växjö, Sweden) is a Swedish researcher and best known for his pioneering contributions to networked control systems, cyber-physical systems, and hybrid systems. His research has had particular application impact in transportation, automation, and energy networks. He holds a Chaired Professorship in Networked Control at the KTH Royal Institute of Technology in Stockholm, Sweden. He is Director of KTH Digital Futures.

Career Karl H. Johansson graduated from Lund University in Sweden with an MSc in 1992 and a PhD in 1997. He did a postdoc at UC Berkeley 1998-2000 and has since then held the positions of Assistant, Associate, and Full Professor at the Department of Automatic Control at KTH Royal Institute of Technology. He has directed the ACCESS Linnaeus Centre 2009-2016 and the Strategic Research Area ICT TNG 2013-2020, two of the largest research environments in electrical engineering and computer science in Sweden. He has held visiting positions at UC Berkeley, California Institute of Technology, Nanyang Technological University, Hong Kong University of Science and Technology Institute of Advanced Studies, Norwegian University of Science and Technology, and Zhejiang University. He is the IEEE Control Systems Society Vice President of Diversity, Outreach & Development, an IFAC Council Member, and a past president of the European Control Association. He has served on the Swedish Research Council's Scientific Council for Natural Sciences and Engineering Sciences, IEEE Control Systems Society Board of Governors, IFAC Executive Board. He is past Chair of the IFAC Technical Committee on Networked Systems. He has been on the Editorial Boards of Automatica, IEEE Transactions on Automatic Control, IEEE Transactions on Control of Network Systems, IET Control Theory and Applications, Annual Review of Control, Robotics, and Autonomous Systems, European Journal of Control, and ACM Transactions on Internet of Things, and currently serves on the Editorial Board of ACM Transactions on Cyber-Physical Systems. He was the General Chair of the ACM/IEEE Cyber-Physical Systems Week 2010 and IPC Chair of many conferences. His research focuses on networked control systems, cyber-physical systems, and applications in transportation, energy, and automation networks; areas in which he has co-authored more than 900 journal and conference papers. He has advised more than 60 postdocs and 34 PhD students.

Honours Karl H. Johansson has received several best paper awards and other distinctions from IEEE, IFAC, and ACM. He is the recipient of the 2024 IEEE Control Systems Society Hendrik W. Bode Lecture Prize. He received the IFAC Outstanding Service Award 2023. In 2017 he was awarded Distinguished Professor of the Swedish Research Council and in 2009 he was awarded Wallenberg Scholar, as one of the first ten scholars from all sciences, by the Knut and Alice Wallenberg Foundation. He was awarded Future Research Leader from the Swedish Foundation for Strategic Research in 2005. He received the triennial Young Author Prize from IFAC in 1996 and the Peccei Award from IIASA, Austria, in 1993. He was granted Young Researcher Awards from Scania AB in 1996 and from Ericsson in 1998 and 1999. He is Fellow of the IEEE and the Royal Swedish Academy of Engineering Sciences, and he is Distinguished Lecturer with the IEEE Control Systems Society.

Works D. V. Dimarogonas, E. Frazzoli, K. H. Johansson, "Distributed event-triggered control for multi-agent systems," IEEE Transactions on Automatic Control, vol. 57, no. 5, pp. 1291-1297, May 2012. doi: 10.1109/TAC.2011.2174666 K. H. Johansson, "The quadruple-tank process: a multivariable laboratory process with an adjustable zero," in IEEE Transactions on Control Systems Technology, vol. 8, no. 3, pp. 456-465, May 2000. doi: 10.1109/87.845876 J. Lygeros, K. H. Johansson, S. N. Simic, J. Zhang, S. S. Sastry, "Dynamical properties of hybrid automata," in IEEE Transactions on Automatic Control, vol. 48, no. 1, pp. 2-17, Jan. 2003. doi: 10.1109/TAC.2002.806650 A. Teixeira, I. Shames, H. Sandberg, K. H. Johansson, "A secure control framework for resource-limited adversaries," Automatica, Volume 51, 2015, Pages 135-148, ISSN 0005-1098, doi.org/10.1016/j.automatica.2014.10.067 B. Besselink, V. Turri, S. H. van de Hoef, K.-Y. Liang, A. Alam, J. Mårtensson, K. H. Johansson, "Cyber–physical control of road freight transport," in Proceedings of the IEEE, vol. 104, no. 5, pp. 1128-1141, May 2016. doi: 10.1109/JPROC.2015.2511446 A. Keimer, N. Laurent-Brouty, F. Farokhi, H. Signargout, V. Cvetkovic, A. M. Bayen, K. H. Johansson, "Information patterns in the modeling and design of mobility management services," in Proceedings of the IEEE, vol. 106, no. 4, pp. 554-576, April 2018. doi: 10.1109/JPROC.2018.2800001

References

External links Personal Website Google Scholar KAW article on energy savings through connected devices and vehicles KAW article on theory of the interconnected society KAW article on coming to terms with self-driving vehicles (in Swedish)

Worked examples

Example 1 — a first encounter with Karl Henrik Johansson

Start with the simplest possible case. Write down what Karl Henrik Johansson claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Karl Henrik Johansson before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Karl Henrik Johansson ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Karl Henrik Johansson

In research: Karl Henrik Johansson appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Karl Henrik Johansson in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Karl Henrik Johansson is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1967 births, Control theorists, Fellows of the IEEE, so understanding it makes those chapters shorter.
In everyday life: Look for Karl Henrik Johansson outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Karl Henrik Johansson in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Karl Henrik Johansson means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Karl Henrik Johansson out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Karl Henrik Johansson in simple terms?

Why does Karl Henrik Johansson matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Karl Henrik Johansson?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Karl Henrik Johansson.