engineering

Hassan K. Khalil

Hassan K. Khalil is a engineering 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 Hassan K. Khalil rather than just read about it. In short: Hassan K. Khalil (born February 20, 1950, in Cairo) is an Egyptian-born American electrical engineer and University Distinguished Professor Emeritus at Michigan State University.

Key takeaways

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

Reference excerpt

Hassan K. Khalil (born February 20, 1950, in Cairo) is an Egyptian-born American electrical engineer and University Distinguished Professor Emeritus at Michigan State University. He specializes in nonlinear control and singular perturbation theory, and is widely known for his textbook Nonlinear Systems, which received the 2002 IFAC Control Engineering Textbook Prize. He was named a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 1989 for contributions to singular perturbation theory and its application to control.

Education Khalil received his B.S. (1973) and M.S. (1975) degrees in electrical engineering from Cairo University. Moving to the United States for doctoral studies, he earned his Ph.D. (1978) from the University of Illinois at Urbana-Champaign under the supervision of Petar V. Kokotovic.

Academic career Khalil joined Michigan State University as an assistant professor in 1978, the same year he completed his doctorate. Over his career at MSU, he advanced to become University Distinguished Professor in 2003, receiving multiple teaching honors along the way, including the Teacher Scholar Award (1983), the Withrow Distinguished Scholar Award (1994), the Distinguished Faculty Award (1995), and the Withrow Teaching Excellence Award (2020). Throughout his tenure, Khalil also consulted for General Motors and Delco Electronics. A major focus of Khalil's research program at MSU has been the development of high-gain observers for nonlinear feedback control, a tool that originated at the university and has been advanced through the work of his 16 doctoral students and numerous postdoctoral researchers. Khalil has published over 120 journal papers on singular perturbation methods and nonlinear control. In professional service, Khalil served as associate editor for the IEEE Transactions on Automatic Control (1984–1985), Automatica (1992–1999), and Neural Networks (1997–1998), and later as editor of Automatica for nonlinear systems and control (1999–2008). He was Program Chair of the 1988 American Control Conference and General Chair of the 1994 conference. Khalil retired on May 15, 2020, and was granted emeritus status.

Books Singular Perturbation Methods in Control: Analysis and Design (with Petar V. Kokotovic and John O'Reilly), Academic Press, 1986; reprinted by SIAM, 1999. Nonlinear Systems, Macmillan, 1992; 2nd edition, Prentice Hall, 1996; 3rd edition, Prentice Hall, 2002, ISBN 0-13-067389-7. Nonlinear Control, Pearson, 2015, ISBN 0-13-349926-X. High-Gain Observers in Nonlinear Feedback Control, SIAM, 2017, ISBN 978-1-61197-485-0. Control Systems: An Introduction, Michigan Publishing Services, 2024.

Selected papers Esfandiari, Farzad; Khalil, Hassan K. (1 November 1992). "Output feedback stabilization of fully linearizable systems". International Journal of Control. 56 (5): 1007–1037. doi:10.1080/00207179208934355. Atassi, A.N.; Khalil, H.K. (Sep 1999). "A separation principle for the stabilization of a class of nonlinear systems". IEEE Transactions on Automatic Control. 44 (9): 1672–1687. doi:10.1109/9.788534. S2CID 11458113. Khalil, H.K. (Feb 1996). "Adaptive output feedback control of nonlinear systems represented by input-output models". IEEE Transactions on Automatic Control. 41 (2): 177–188. doi:10.1109/9.481517. Seshagiri, S.; Khalil, H.K. (Jan 2000). "Output feedback control of nonlinear systems using RBF neural networks". IEEE Transactions on Neural Networks. 11 (1): 69–79. doi:10.1109/72.822511. PMID 18249740.

Awards and honors IEEE Fellow (1989), for contributions to singular perturbation theory and its application to control George S. Axelby Outstanding Paper Award, IEEE Control Systems Society (1989) John R. Ragazzini Education Award, American Automatic Control Council (2000) IFAC Control Engineering Textbook Prize (2002) O. Hugo Schuck Best Paper Award, American Automatic Control Council (2004) IFAC Fellow (2007), for contributions to singular perturbation theory, nonlinear feedback control, and control education Bode Lecture Prize, IEEE Control Systems Society (2015) Rufus Oldenburger Medal, ASME (2025)

References

Worked examples

Example 1 — a first encounter with Hassan K. Khalil

Start with the simplest possible case. Write down what Hassan K. Khalil claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Hassan K. Khalil 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 Hassan K. Khalil 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 Hassan K. Khalil

In research: Hassan K. Khalil appears in engineering 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 Hassan K. Khalil 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: Hassan K. Khalil is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1950 births, 20th-century American engineers, 21st-century American engineers, so understanding it makes those chapters shorter.
In everyday life: Look for Hassan K. Khalil 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 Hassan K. Khalil in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hassan K. Khalil 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 Hassan K. Khalil out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hassan K. Khalil in simple terms?

Hassan K. Khalil (born February 20, 1950, in Cairo) is an Egyptian-born American electrical engineer and University Distinguished Professor Emeritus at Michigan State University.

Why does Hassan K. Khalil matter?

Because it connects several engineering 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 Hassan K. Khalil?

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 Hassan K. Khalil.