Prof. K. S. Walgama (Keerthi)

 


Department of Engineering Mathematics
Faculty of Engineering
University of Peradeniya
Peradeniya
Sri Lanka.
 
Tel. No. +94 081-239 3344
Email     kswalgama@pdn.ac.lk

Academic & Professional Qualifications
 
  • BSc Eng (1980)
    Electronic and Telecommunication Engineering
    University of Moratuwa
    Sri Lanka.

  • MEE (1984)
    Electronic Engineering
    Phillips International Institute of technology
    Eindhoven
    The Netherlands.

  • MSc (1986)
    Process Control Engineering
    Department of Chemical Engineering
    University of Alberta
    Edmonton
    Canada.
  • PhD (1991)
    Automatic Control
    Department of Systems Engineering and Applied Mathematics
    Lulea University of Technology
    Sweden.

  • Corporate Member, Institute of Engineers Sri Lanka.

  Awards
 
  • Award for Second Best Research Presentation, Annual Research Sessions, Univ. of Peradeniya, for the paper Optimal Tuning of anti-windup Compansators (with D.H.S. Maithripala). (1997) 
  • Award for Best Research Presentation (by Senior Researchers) under the category " Energy and Environmental Sciences" at the Annual Research Sessions, Univ. of Peradeniya, for the paper Development of Digital Control System for Current and Temperature Control of an Electrodialyser (with J.B. Ekanayake and A. Atputharaja). (1998)

  • Presidential Award for publication in an indexed journal. (2005)

  Research Interests

 
  • Control Systems, Signal Processing, Mathematical Modelling, System Identification, Evolutionary Computation, Optimization .

  Academic and Administrative Positions


  • Director, Academic Affairs, University of Peradeniya. (2007- todate)
  • Director, Center for Engineering Research and Postgraduate Studies. (2003-2006)
  • Head, Department of Computer Engineering, Univerisity of Peradeniya. (2003-2006)
  • Head, Department of Engineering Mathematics, University of Peradeniya. (1998-2001)

  Professional Activities



  • Participant, IEEE Power Tech. Conference, Royal Institute of Technology, Sweden. (June 1995)

  • Presenter, Control Strategies for Bioreactors, Lulea University of Technology, Sweden. (June 1995)

  • Presenter, Numerical Modelling of Tea Plant Growth, Second Workshop on the Modelling and Simulation of Tea Production, Tea Research Institute. (1995)

  • Participant, College on "Microprocessor based Real Time Control Systems", International Center for Theoretical Physics, Trieste, Italy. (September 1994)

  • Conductor, Three day course on "Control Systems", Kelanitissa Power Station, Colombo. (1994)

  • Conductor, One day course on "Control Systems" for CEB Engineers, Victoria Power Station. (1995)

  • Conductor, One day course on "Control Systems" , Samanalawewa Power Station. (1996)

  • Conductor, Two day short course for practising engineers on "Industrial Motion Control" in collaboration with Dept. of Elec. Eng. and SAREC of Sweden.

  • Reviewer, IEE Proceeding-D, Control Theory and Applications. (1993-)

  • Reviewer, International Journal of Control.(1993-)

  • Reviewer, International Journal of Adaptive Control and Signal Processing. (1994-)

  • Reviewer, Transactions of the ASME-Journal of Dynamic Systems, Measurements and Control.(1993-)

  • Reviewer, Engineer, Journal of IESL. (1995-)

  • Senior Consultant, Dept. of Math. & Philosophy of Engin., Open Univ. of Sri Lanka. (1996-97)

  • Visiting Researcher, Div. of Electrical Machines and Drives, Royal Institute of Technology, Sweden. (May - June 1997).

  • Member, Institute of Engineers, Sri Lanka.

  • Member, Sri Lanka Assoc. for the Advancement of Science (SLAAS). (1993-)

  • Participant, Workshop on Teaching Methods, Education Unit, Faculty of Agriculture, Univ. of Peradeniya.

  • Supervisor, Ph.D. thesis of S. Alahakoon on "Modelling and Control of an Active Magnetic Bearing Actuator," Dept. of Electrical and Electronics Engin., Univ. of Peradeniya, & Div. of Electrical Machines and Drives, Royal Inst. of Tech. (KTH), Sweden.

  • Supervisor, M.Phil. thesis of D.H.S. Maithripala on "Optimal Tuning of Anti-Windup Compensators," Dept. of Engin. Maths, Univ. of Peradeniya. (1997)

  • Supervisor, M.Phil. thesis of S. Sithirasenan on "Intelligent Control of an Autonomous Guided Vehicle," Depts. of Engin. Maths & Computer Sci., Univ. of Peradeniya.

  • Supervisor, PGDip. thesis of S. Selvarajan on "A Study on Optimization Methods and Neural Networks for Mathematical Modelling of Dynamical Systems," Dept. of Engin. Maths, Univ. of Peradeniya. (1997)

  • Supervisor, PGDip. thesis of N.L. Jayatilake on "A Study on Auto Tuning PID Controllers," Dept. of Engin. Maths, Univ. of Peradeniya.

  • Supervisor, PGDip. thesis of R. Ratnayake on "Implementation Issues on Adaptive Periodic Disturbance Cancellation Controllers," Dept. of Engin. Maths, Univ. of Peradeniya.
  • Member, Arts Council, Univ. of Peradeniya. (1998)

  Publications

  • Deegalla, S., Walgama, K. S., and Bostrom, H. (2006). “A comparative study on principal component analysis and random projection for nearest neighbor classification.” Proceedings of the Peradeniya University Research Sessions (PURSE-2006).

  • Wickramasinghe, I. P. M., and Walgama, K. S. (2006). “Development of control strategies for open channel flow control and fore bay level control.” Proceedings of the 11th Asian Congress of Fluid mechanics, Kula-Lampur, Malaysia.

  • Liyanage, S. R., Walgama, K. S., Goonasekara, C. D. A., Wickramasinghe, I. P. M., and Perera, T. M. A. S. (2006). “A prototype fuzzy logic based diagnostic expert system for common respiratory diseases needing intensive care.” Proceedings of the Peradeniya University Research Sessions (PURSE-2006).

  • Wickramasinghe, I. P. M., and Walgama, K. S. (2005). “Rule based controller design for water level control of fore bay fed by an open channel.” Proceedings of the International Conference on Information and Automation,  Colombo, Sri Lanka.

  • Wickramasinghe, I. P. M., and Walgama, K. S. (2005). “Development of control strategies for water level control of a forebay fed by an open channel.” Proceedings of the Peradeniya University Research Sessions.

  • Seneviratne, G. M. M. M. A., Nanayakkara, N. K. P. K., Walgama, K. S., Yatawatte, A. B., and Goonasekara, C. D. A. (2004). “Prototype Medical Decision Support System Utilizing Sensitivity and Specificity of clinical features for Diagnosis: A Novel Approach.” Ceylon Journal of Medical Science, Vol. 47, pp 51-58.

  • Nanayakkara, N. K. P. K., Walgama, K. S., Yatawatte, A. B., Seneviratne, A., and Goonasekera, C. D. A. (2003). “Development of prototype computer based medical decision support system that utilizes ‘sensitivity’ and ‘specificity’ of a clinical feature for diagnosis: A novel approach.”  Proceedings of the Peradeniya University Research Sessions, Sri Lanka, Vol. 8.

  • Wickramasinghe, I. P. M., and Walgama, K. S. (2003). “ Simulation and Control of Open Channel flow in a mini hydro power station.” Proceedings of the Peradeniya University Research Sessions, Sri Lanka, Vol. 8.

  • Vignarajah, M., Ranaweera, M. P., and Walgama, K. S. (2003). “Finite element of large displacement analysis.” Proceedings of the Peradeniya University Research Sessions, Sri Lanka, Vol. 8.

  • Samaranayake, L., Alahakoon, S., and Walgama, K. S. (2003). “Speed controller strategies for Distributed motion control via Eithernet.” IEEE International  Symposium on  Intelligent Control, USA.

  • Goonasekara, C. D. A., Walgama, K. S., and Nanayakkara, N. K. P. K. (2002). “An Innovative prototype decision support system for critical care Problems.” 8th Annual Scientific Sessions, College of Anesthesiologists of Sri Lanka.

  • Alahakoon, S., Walgama, K. S., Leksell, M.. and Harnefors, L. (2001). “New Cascaded Controller Structure for Variable Speed Permanent Magnet Synchronous Motor Drives.” Conference on Drives & Controls and Power Electronics.

  • Goonasekara, C. D. A., Walgama, K. S., and Nanayakkara, N. K. P. K. (2001). “An Innovative prototype decision support system for critical care.” 8th world congress of intensive and critical care medicine, Sydney, Australia.

  • Ariyarathna, S. M. W. T. P. K., Shanthini R., and Walgama, K. S. (2001). "Use of Cation Exchange membrane in the Electrodialysis Treatment of Black Liquor." Proceedings of the Annual Research Sessions, University of Peradeniya, Sri Lanka, Vol. 6.

  • Kulasekara, E. C., Hangen, L. M., Walgama, K. S., and Premaratne, K. (2000). “Optimal placement of Actuators and sensors for Floor Vibration Control.” American Society of Civil Engineering - Journal of Structural Engineering, December.

  • Walgama, K. S., Ekanayake, J. B.. and Atputharaja, A. (2000). “Development of Digital control system for current and Temperature control of an electrodialyser.” Engineer - The Journal of IESL, Vol. XXXII.

  • Maithripala S. & Walgama K. S.; Tunable Antiwindup Compensators for PID Controllers, Engineer, Journal of IESL.

  • Alahakoon S., Walgama K. S., Leksell M. & Harnefors L.; Sensorless Adaptive Control of Permanent-Magnet Synchronous Motors based on a Voltage Error Vector, IEEE Advanced Motion Control Conference, Coimbra, Portugal. (1998)

  • Alahakoon S., Walgama K. S., Leksell M. & Harnefors L.; Sensorless Adaptive Control of Permanent-Magnet Synchronous Motors for Improved Performance, IEE Annual Research Session, Colombo. (1998)

  • Alahakoon S., Walgama K. S., Leksell M. & Harnefors L.; Sensorless Adaptive Control of Permanent-Magnet Synchronous Motor, (Abstract), Proc. Annual Research Sessions, University of Peradeniya. (1998)

  • Ekanayake J. B.& Walgama K.S.; Controllers for Static Var Compensation, Transactions of Institute of Engineers, Sri Lanka. (1998)

  • Maithripala S. & Walgama K .S.; Optimal Anti-Windup Compensator Design to Handle a Wide Range of Setpoints, (Abstract), Proc.\ Annual Research Sessions, University of Peradeniya. (1998)

  • Walgama K. S., Ekanayake J. B.& Atputharaja A.; Development of Digital Control System for Current and Temperature Control of an Electrodialyser, Proc. Annual Research Sessions, University of Peradeniya. (1998)

  • Ariyaratne T., Ketharaswari P., Shanthini R. & Walgama K. S.; Experimenting with a Household Composter, Proc. of Annual Research Sessions, University of Peradeniya. (1997)

  • Arulanandam N., Shanthini R. & Walgama K. S.; Modelling of Anode Temperature Dynamics of an Electrodialyser Unit for Black Liquor Treatment, Annual Research Sessions, Faculty of Engineering, University of Peradeniya. (1997)

  • Alahakoon S., Walgama K. S., Leksell M. & Sadarangani C.; Digital Control of Active Magnetic Bearing, Proc. of IEE Annual Sessions, Colombo, Sri Lanka. (1997)

  • Alahakoon S., Walgama K. S., Leksell M. & Sadarangani C.; Modelling and Control of Active Magnetic Bearing Actuator with MATLAB based Software Environment, Proc. Nordic MATLAB Conf., Stockholm, Sweden. (1997)

  • Alahakoon S., Walgama K. S., Leksell M. & Harnefors L.; An Investigation into a Sensorless Adaptive Control Scheme based on a Voltage Error Vector for Permanent-Magnet Synchronous Motors, Power Quality & Intelligent Motion Control Conference, Nuremburg, Germany. (1997)

  • Maithripala S. & Walgama K. S.; Optimal Tuning of Anti-Windup Compensators, Proc. of Annual Research Sessions, University of Peradeniya. (1997)

  • Alahakoon S., Walgama K. S., Leksell M. & Sadarangani C.; Digital Control of Active Magnetic Bearings for Precise Eccentric Rotor Positioning, Fifth International Symposium of Magnetic Bearings, Kanasawa, Japan. (1996)

  • Hillerstrom G. & Walgama K. S.; Repetitive Control Theory and Applications - A Survey, IFAC World Control Congress, San Francisco, California. (1996)

  • Walgama K. S. & Sternby J.; A Feedforward Controller Design for Periodic Signals in Non-Minimum Phase Processes, Int. J. Control, 61, 3, 695-718. (1995)

  • Walgama K. S.; Numerical Modelling of Tea plant Growth, Second Workshop on the Modelling and Simulation of Tea Production, TRI-EFAC-BOKU, Tea Research Institute. (1995)

  • Karunaratne D. G. G. P. & Walgama K. S.; Mathematical Models and Controller Design for Bioreactors, Research Report , Department of Engineering Mathematics, University of Peradeniya. (1993) (Also presented at SLAAS Annual Conference, 1993)

  • Walgama K. S. & Sternby J.; On the Convergence Properties of Adaptive Pole Placement Controllers with Anti-Windup Compensators, IEEE Trans. of Automatic Control, 38, 1 , 128-132. (1993)

  • Jayasuriya S. & Walgama K. S.; On Continuous Tracking under Zero, Finite or Arbitrary Preview Information, DSC-Vol 50 / PED-Vol 63, Symp. on Mechatronics, ASME.San Francisco, California. (1993)

  • Walgama K. S. & Sternby J.; Conditioning Technique for Multi-Input Multi-Output Processes with Input Saturation, Proc. of IEE, Part D, 140, 231-241. (1993)

  • Walgama K. S.; Time-Varying Controllers for Simultaneous Rejection of Periodic Disturbances and Stochastic Noise, Research Report , Department of Engineering Mathematics, University of Peradeniya. (1993)

  • Walgama K. S. & Fisher D. G.; Observer Based Predictors for Processes with Time Delays, Research Report, Department of Engineering Mathematics, University of Peradeniya. (1993)

  • Walgama K. S. & Kirubarajan T.; On Time-Varying Tuned Filters, Research Report , Department of Engineering Mathematics, University of Peradeniya. (1992)

  • Ronnback S., Walgama K. S. & Sternby J.; An Extension to the Generalized Anti-Windup Compensator, Mathematics of the Analysis and Design of Process Control, Ed. P. Borne, S. G. Tzafestas & N.E. Radhy, Elsevier Science Publishers BV, North Holland. (1992)

  • Walgama K. S. & Sternby J.; Generalization of Conditioning Technique for Anti-Windup Compensator, Proc. IEE, Part D, 139, 109-118. (1992)