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Dr JD le Roux (Derik)

Position

Senior Lecturer

Qualifications

B.Eng.Electronic (Pret) 
B.Eng.(Hons) Electronic (Pret) 
M.Eng. Electronics (Pret)
PhD Electronics (Pret)

Awards:
- 2015:University of Pretoria Staff Exchange Bursary Programme
- 2015: Vice-Chancellors Academic Development Grant for completion of PhD. 
- 2009: Louis van Biljon Bronze Medal for academic performance in 3rd and 4th Year. 
- 2009: Mintek prize for best student in the module “Automation” (EBT410).
- 2008: Rapid-M prize for best student in the module “Modulation Systems” (EMS310).
- 2008: Second top student in Electronic Engineering 3rd Year.
- 2007: Second top student in Electronic Engineering 2nd Year.
- 2006: Second top student in Electronic Engineering 1st Year.

Teaching

Undergraduate
- Electricity and Electronics EBN111/EBN122
- Electrical Engineering EIR211/EIR221

Postgraduate
- Optimal Control EBO780

Membership

South African Council for Automation and Control (SACAC):
- Executive Committee Member (2014 - Present)
- Treasurer (2015 - Present)
ECSA: Candidate Engineer (2011 - Present)
IEEE: Graduate member (2010 - 2014, 2016 - Present)
Ordinary member of IFAC Publication Committee (2017-2020).

Research

Research Group 

Control Systems

Research Topics

Process Control in the Mineral, Metals and Mining Industry

  • Developing low-cost control-relevant nonlinear process models for comminution processes.
  • State and parameter estimation in the mineral processing industry.
  • Advanced process control of comminution processes using fundamental nonlinear models, e.g. applying Model Predictive Static Programming to a grinding mill circuit using a nonlinear process model.

Recent Journal Publications:

  • Aguila-Camacho, N., Le Roux, J.D., Duarte-Mermoud, M.A., Orcharda, M.E., 2017, “Control of a grinding mill circuit using simple fractional order controllers”, J. Process Control, 53, pp. 80-94.
  • Le Roux, J.D., Steinboeck, A., Kugi, A., Craig, I.K., 2017, “An EKF observer to estimate semi-autogenous grinding mill hold-ups”, J. Process Control, 51, pp. 27-41.
  • Le Roux, J.D., Olivier, L.E., Naidoo, A.M., Padhi, R., Craig, I.K., 2016, “Throughput and product quality control for a grinding mill circuit using Nonlinear MPC”, J. Process Control, 42, pp. 35-50.
  • Le Roux, J.D., Padhi, R., Craig, I.K., 2014, “Optimal Control of Grinding Mill Circuit using Model Predictive Static Programming: A New Nonlinear MPC Paradigm”, J. Process Control, 24, pp. 29-40.
  • Le Roux, J.D., Craig, I.K., 2013, “Reducing the number of size classes in a cumulative rates model used for process control of a grinding mill circuit”, Powder Tech., 246, pp. 169-181.
  • Le Roux, J.D., Craig, I.K., Hulbert, D.G., Hinde, A.H., 2013., “Analysis and validation of a run-of-mine ore grinding mill circuit model for process control”, Minerals Eng., 43-44, pp. 121-134.

Recent Conference Publications:

  • Le Roux, J.D., Craig, I.K., “Requirements for estimating the volume of rocks and balls in a grinding mill”, presented at the 20th IFAC World Congress, Toulouse, France, July 9-13, 2017.
  • Le Roux, J.D., Craig, I.K., “State and parameter identifiability of a nonlinear grinding mill circuit model”, presented at 17th IFAC International Symposium Control Optimisation Automation Mining Mineral Metal Processing, Vienna, Austria, Aug. 31 – Sept. 2, 2016.
  • Le Roux, J.D., Skogestad, S., Craig, I.K., “Plant-wide control of grinding mill circuits: Top-down analysis”, presented at 17th IFAC International Symposium Control Optimisation Automation Mining Mineral Metal Processing, Vienna, Austria, Aug. 31 – Sept. 2, 2016.
  • Le Roux, J.D., Steinboeck, A., Kugi, A., Craig, I.K., “Nonlinear observability of grinding mill conditions”, presented at 17th IFAC International Symposium Control Optimisation Automation Mining Mineral Metal Processing, Vienna, Austria, Aug. 31 – Sept. 2, 2016.
  • Botha, S., Craig, I.K., Le Roux, J.D., “Switching cyclones to increase product particle size range for ore milling circuits”, presented at 4th IFAC Workshop Mining Mineral Metal Industries, Oulu, Finland, Aug. 25-28, 2015
  • Le Roux, J.D., Craig, I.K., Padhi, R., “Output Tracking for a Milling Circuit using Model Predictive Static Programming”, accepted for presentation at 10th IFAC International Symposium on Dynamics and Control of Process Systems, Cape Town, South Africa, Aug. 24-29, 2014.
  • Le Roux, J.D., Craig, I.K., Padhi, R., “State and Parameter Estimation for a Grinding Mill Circuit from Operational Input-Output Data”, presented at 10th IFAC International Symposium on Dynamics and Control of Process Systems, Mumbai, India, Dec. 18-20, 2013.
  • Le Roux, J.D., Craig, I.K., “Size class reduction in a cumulative rates model for a grinding mill circuit”, presented at the IFAC Workshop Automation Mining Mineral Metal Industries, Gifu, Japan. Sept. 10-12, 2012.
  • Le Roux, J.D., Craig, I.K., “Analysis and validation of a run-of-mine ore grinding mill circuit model”, presented at the 8th International Comminution Symposium (Comminution '12), Cape Town, South Africa, April 17-20, 2012.
  • Le Roux, J.D., Craig, I.K., “Identifiability of run-of-mine ore grinding mill circuit parameters,” presented at the 10th IEEE Region 8 Africon 2011 Conference, Livingstone, Zambia, Sept. 13-15, 2011.

National and International Participation

National

  • “Observer Design Workshop”, presented by SACAC at Lynnwood Conference Centre, 21 October 2016 – Presenter.
  • “Workshop on Modern Techniques and Software for Process Control”, presented by SACAC, Johannesburg, 21 July 2016 – Participant.
  • “SACAC Control Systems Day”, Stellenbosch University, 12 Nov. 2015 – Participant.
  • “Energy Optimisation and Management through Control”, presented by SACAC, University of Pretoria, 16 Oct. 2015, – Organizer.
  • “Measurement, Modelling and Control for Coal Processing”, presented by SACAC, University of Pretoria, 28 Nov. 2014, – Organizer.
  • “Optimization for engineering applications – a hands-on introduction for beginners”, presented by SACAC, Johannesburg, 3 April 2014 – Participant.
  • “SACAC Control Systems Day”, University of Pretoria, 27 Nov. 2012 – Organizer.
  • “Short Course in Mineral Processing, Plant Simulation, Optimisation and Design using JKSimMetTM Mineral Processing Simulator V6”, presented by MPTech, 8-12 October 2012 – Participant.

International

Conferences

  • Mining, Mineral and Metal Processing Symposium 2019: Local Organising Committee
  • Control Conference Africa 2017: Local Organising Committee
  • IEEE Africon2017: Technical Track Chair for Control Automation

Acted as reviewer for the following journals:

  • Control Engineering Practice (2016)
  • Industrial and Research Chemistry Research (2016)
  • Minerals Engineering (2016, 2017)
  • International Journal of Mineral Processing (2012, 2015, 2016, 2017)
  • Powder Technology (2013, 2015)
  • Particulate Science and Technology (2017)

Acted as reviewer for the following conferences:

  • Control Conference Africa, Johannesburg, South Africa, 7-8 December 2017.
  • IEEE Africon 2017, Cape Town, South Africa, 18-20 September 2017.
  • 20th IFAC World Congress, Toulouse, France, 9-14 July 2017.
  • 3rd Conference on Control and Fault-Tolerant Systems, Barcelona, Spain, 7 – 9 Sept., 2016.
  • 17th IFAC International Symposium Control Optimisation Automation Mining Mineral Metal Processing, Vienna, Austria, 31 Aug. – 2 Sept., 2016.
  • 4th IFAC Workshop Mining Mineral Metal Industries, Oulu, Finland, Aug. 25-28, 2015.
  • IEEE International Conference on Industrial Technology, 25-27 Feb., 2013, Cape Town, South Africa.
  • IFAC Workshop on Automation in the Mining, Mineral and Metal Industries, 10-12 Sept., 2012, Nagaragawa, Gifu, Japan.

Attended as participant:

  • 20th Nordic Process Control Workshop, 25 – 26 Aug., 2016, Stockholm, Sweden.
  • 12th European Control Conference, 17 - 19 July 2013, Zurich, Switzerland.
  • 18th IFAC World Congress, 28 Aug. - 2 Sept. 2011, Milan, Italy.
  • 13th Symposium on Automation in Mining, Mineral and Metal Processing, 2-4 Aug. 2010, Cape Town, South Africa.

Visits to universities as guest

  • Aalto University, Prof S-L. Jamsa-Jounela, Helsinki, Finland, 30 Sept – 15 Oct 2017.
  • Norwegian University of Science and Technology, Prof. S. Skogestad, Trondheim, Norway, 1 May 2015 – 31 June 2015.
  • Koc Unviersity, Prof. Y. Arkun, Istanbul, Turkey, 28 April 2015.
  • Technical University of Vienna, Prof. A. Kugi, Vienna, Austria, 2 Jan. 2015 – 24 April 2015.
  • POSTECH, Prof. S. Won, Pohang, South Korea, 18 Sept. 2012.
  • Seoul National University, Prof. H. Shim, Seoul, South Korea, 17 Sept. 2012.

Address and Contact

Address:
Engineering Tower Building 1: Floor 13, Room 13
Main Campus, University of Pretoria
0002 Pretoria
South Africa

Contact
Email: derik.leroux(at)up.ac.za
Tel: +27 12 420-2201

Control Systems Group 2014

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Last edited by Johan le RouxEdit