David John Noel Limebeer
Born(1952-07-31)31 July 1952
Alma materMichaelhouse
University of the Witwatersrand
University of Natal
University of London
Known forContributions to electrical machines, robust control and vehicle dynamics
AwardsFREng
IEEE
Scientific career
FieldsControl engineering and vehicle dynamics
InstitutionsUniversity of Cambridge; Imperial College London; University of Oxford
ThesisAnalysis and control of AC rotating machines in the presence of series capacitor compensated transmission networks (1980)
Doctoral advisorRonald G. Harley

David John Noel Limebeer (born 31 July 1952) is an electrical engineer and academic. He is an Emeritus Professor of Control Engineering at the University of Oxford and a Distinguished Professor at the University of the Witwatersrand.[1] He is also an Emeritus Professorial Fellow at New College, Oxford.[2]

Limebeer is known for his contributions in engineering dynamics, with his contributions spanning electrical machines, robust control theory, and vehicle dynamics. He has published numerous peer-reviewed articles and books, including Linear Robust Control (with Michael Green), and Dynamics and Optimal Control of Road Vehicles (with Matteo Massaro). He is the recipient of two South African Institute of Electrical Engineers Prizes and award certificates, the University of Hong Kong William Mong Distinguished Lecture prize,[3] and the 2019 Honeywell International Medal from the Institute of Measurement and Control.[4] He is A1 rated with the South African National Research Foundation.[5]

Limebeer is a Fellow of the Royal Academy of Engineering,[6] the Institute of Electrical Engineers,[7] the South African Academy of Engineering, the City and Guilds of London Institute, and is a Life Fellow of the Institute of Electrical and Electronics Engineers.

Education

Limebeer obtained his B.Sc.in engineering from the University of the Witwatersrand in 1974 and then attended the University of Natal from 1975 to 1980, where he received his M.Sc. in engineering and a PhD degree. From 1980 to 1984, he was a post-doctoral fellow at the University of Cambridge. He earned a D.Sc. in engineering from the University of London in 1992,[8] and a MA degree from the University of Oxford in 2009 (conferred by resolution).[9]

Career

Limebeer joined Imperial College London in 1984 as a lecturer in the Department of Electrical and Electronic Engineering,[10] was promoted to Reader in 1989, Professor in 1993 and served as Head of the department between 1999 and 2008. He was Professor of Control Engineering at the University of Oxford between 2008 and 2019, where he was also a Professorial Fellow at New College (Oxford). Since 2019, he has been an Emeritus Professor of Control Engineering at the University of Oxford and an Emeritus Professorial Fellow at New College. Following his retirement and return to South Africa, where he held emeritus positions at the University of Pretoria and the University of Johannesburg. Since 2021 he has been serving as a Distinguished Professor at the University of the Witwatersrand.[1]

Limebeer has acted as an expert witness in several product liability, accident investigation, and patent cases. He has also consulted for several Formula One, MotoGP and NASCAR teams.[11]

He has held a number of editorial positions, including Associate Editor for Systems and Control Letters, an Editor for Automatica, and serves as an Editorial Board Member for Multibody System Dynamics.[12]

Research

Limebeer's research covers both theoretical and applied contributions to control engineering and dynamic systems. These include contributions to the understanding and prevention of subsynchronous resonance (SSR) in electrical machines, robust control and the dynamics of road vehicles including bicycles, motorcycles, and Formula One and NASCAR specification race cars.[13][14]

Subsynchronous resonance (SSR)

SSR is an electro-mechanical resonance phenomenon that occurs in alternating-current (AC) machines when series capacitor compensation is included in the motor’s power supply. Limebeer’s work includes the design, operation, and limitations of passive-SSR suppression filters.[15][16] He also explored SSR in induction motors with series capacitor compensated feeders, this work revealed improved starting time and voltage regulation, with unstable speed bands in both single-cage,[17] and deep-bar motors.[18]

Robust control

Robust control aims to achieve adequate performance and/or stability in the presence of modelling errors. Having considered the central problem of finding low-order robust controllers in the 1980s, Limebeer established that low-order controllers exist;[19] and also contributed to the solution of the optimal case.[20] In the periodically time-varying case, he explored the robust control of a satellite in a three-dimensional "halo" orbit and introduced a quantifiable robust stability margin that maintains the orbit while also ensuring robust stability.[21] Much of this work is summarized in the textbook Linear Robust Control (with M. Green).[22]

Vehicle dynamics

Another aspect of Limebeer's research is his work on motorcycle and race car dynamics. Working with Robin S. Sharp, he developed computational methods for finding vehicle models,[23] that were later made into the commercial software product BikeSim.[24] Prompted by the introduction in 2014 of fuel-saving regulations into Formula One, he studied the use of optimal control in closed-circuit racing,[25] emphasizing the optimal deployment of limited fuel sources,[26] later work focused on tyre management,[27] and three-dimensional track modelling.[28][29] In 2021, he focused on modifying his Formula One work for use on highly banked NASCAR ovals.[14] Some of his vehicle dynamics work is included in the textbook Dynamics and Optimal Control of Road Vehicles.[30]

Awards and honors

Bibliography

Selected Books

  • Limebeer, David (1994). Linear Robust Control-Solutions. Prentice Hall. ISBN 0131335472.
  • Limebeer, David (2012). Linear Robust Control. Courier Corporation. ISBN 978-0486488363.
  • Limebeer, David (2018). Dynamics and Optimal Control of Road Vehicles. ISBN 978-0198825715.

Selected articles

References

  1. 1 2 "Distinguished Professors – Wits University". www.wits.ac.za.
  2. ↑ "Emeritus and Wykeham Fellows | New College". www.new.ox.ac.uk.
  3. ↑ "Distinguished Lectures | Faculty of Engineering, HKU". engg.hku.hk.
  4. ↑ "InstMC Awards". www.instmc.org.
  5. 1 2 "National Research Foundation".
  6. 1 2 "Royal Academy of Engineering Fellows".
  7. 1 2 "IET – Home". www.theiet.org.
  8. ↑ "Study with the University of London, anywhere in the world". www.london.ac.uk.
  9. ↑ "Degrees by Resolution 2020/21". gazette.web.ox.ac.uk.
  10. ↑ "Department of Electrical and Electronic Engineering". Imperial College London.
  11. ↑ "Professor David J.N. Limebeer".
  12. ↑ "Multibody System Dynamics". Springer.
  13. ↑ "Engineering Science | New College". www.new.ox.ac.uk.
  14. 1 2 Limebeer, D. J. N.; Bastin, M.; Warren, E.; Fensham, H. G. (4 May 2023). "Optimal control of a NASCAR – specification race car". Vehicle System Dynamics. 61 (5): 1210–1235. Bibcode:2023VSD....61.1210L. doi:10.1080/00423114.2022.2067573. S2CID 248712222.
  15. ↑ Limebeer, D. J. N.; Harley, R. G.; Lahoud, M. A. (19 November 1981). "Suppressing subsynchronous resonance with static deate=13 October 2023". IEE Proceedings - Generation, Transmission and Distribution. 1 (128): 33–44. doi:10.1049/ip-c.1981.0006.
  16. ↑ "Research Paper No 8: Subsynchronous resonance of the Koeberg turbo-generators and of a laboratory micro-alternator system". Transactions of the South African Institute of Electrical Engineers. 70 (11). November 1979.
  17. ↑ Limebeer, D. J. N.; Harley, R. G. (31 August 1981). "Subsynchronous resonance of single-cage induction motors". IEE Proceedings B - Electric Power Applications. 1 (128): 33–42. doi:10.1049/ip-b:1981.0004 (inactive 13 October 2023) – via www.infona.pl.{{cite journal}}: CS1 maint: DOI inactive as of October 2023 (link)
  18. ↑ Limebeer, D. J. N.; Harley, R. G. (1 January 1981). "Subsynchronous resonance of deep-bar induction motors". IEE Proceedings B - Electric Power Applications. 128 (1): 43–51. doi:10.1049/ip-b.1981.0005 – via digital-library.theiet.org.
  19. ↑ Limebeer, D. J. N.; Hung, Y. S. (30 November 1987). "An Analysis of the Pole-Zero Cancellations in H-Optimal Control Problems of the First Kind". SIAM Journal on Control and Optimization. 25 (6): 1457–1493. doi:10.1137/0325081. hdl:10722/154870 – via CrossRef.
  20. ↑ Glover, K.; Limebeer, D. J. N.; Doyle, J. C.; Kasenally, E. M.; Safonov, M. G. (31 March 1991). "A Characterization of All Solutions to the Four Block General Distance Problem". SIAM Journal on Control and Optimization. 29 (2): 283–324. doi:10.1137/0329016 – via CrossRef.
  21. ↑ Limebeer, David J. N.; Sabatta, Deon (1 February 2022). "Robust control of the circular restricted three-body problem with drag". International Journal of Control. 95 (2): 490–501. Bibcode:2022IJC....95..490L. doi:10.1080/00207179.2020.1798510. S2CID 225419900 – via CrossRef.
  22. ↑ "Linear Robust Control - Search Results". www.worldcat.org.
  23. ↑ Sharp, R.S.; Evangelou, S.; Limebeer, D.J.N. (1 October 2004). "Advances in the Modelling of Motorcycle Dynamics". Multibody System Dynamics. 12 (3): 251–283. doi:10.1023/B:MUBO.0000049195.60868.a2. hdl:10044/1/4326. S2CID 3243509 – via Springer Link.
  24. ↑ "BikeSim Technical References". www.carsim.com.
  25. ↑ Perantoni, Giacomo; Limebeer, David J.N. (4 May 2014). "Optimal control for a Formula One car with variable parameters". Vehicle System Dynamics. 52 (5): 653–678. Bibcode:2014VSD....52..653P. doi:10.1080/00423114.2014.889315. S2CID 53967407 – via CrossRef.
  26. ↑ Limebeer, D.J.N.; Perantoni, G.; Rao, A.V. (23 April 2014). "Optimal control of Formula One car energy recovery systems". International Journal of Control. 87 (10): 2065. Bibcode:2014IJC....87.2065L. doi:10.1080/00207179.2014.900705. S2CID 41823239 – via CrossRef.
  27. ↑ Tremlett, A. J.; Limebeer, D. J. N. (2 October 2016). "Optimal tyre usage for a Formula One car". Vehicle System Dynamics. 54 (10): 1448–1473. Bibcode:2016VSD....54.1448T. doi:10.1080/00423114.2016.1213861. S2CID 113735833 – via CrossRef.
  28. ↑ Perantoni, Giacomo; Limebeer, David J. N. (2015). "Optimal Control of a Formula One Car on a Three-Dimensional Track. Part 1: Track Modelling and Identification". Journal of Dynamic Systems, Measurement, and Control. 137 (5). doi:10.1115/1.4028253. S2CID 121951098.
  29. ↑ Limebeer, D. J. N.; Perantoni, G. (1 May 2015). "Optimal Control of a Formula One Car on a Three-Dimensional Track—Part 2: Optimal Control". Journal of Dynamic Systems, Measurement, and Control. 137 (5). doi:10.1115/1.4029466.
  30. ↑ Limebeer, D. J. N.; Massaro, Matteo (2018). Dynamics and Optimal Control of Road Vehicles. doi:10.1093/oso/9780198825715.001.0001. ISBN 978-0198825715.
  31. ↑ "David J. N. Limebeer – IEEE Fellow".
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