Recent Submissions

  • Development of characteristic equations and robust stability analysis for SISO move suppressed and shifted DMC 

    Dubay, R., G. Kember, C. V. Lakshminarayan, and B. Pramujati. 2006. "Development of characteristic equations and robust stability analysis for SISO move suppressed and shifted DMC." ISA transactions 45(1): 21-33.
    New controller and closed loop transfer functions for move suppressed and shifted dynamic matrix control were derived in order to compare the controller robustness on several plants as a function of tuning parameters and ...
  • Development of characteristic equations and robust stability analysis for MIMO move suppressed and shifted DMC 

    Dubay, R., G. Kember, C. V. Lakshminarayan, and B. Pramujati. 2005. "Development of characteristic equations and robust stability analysis for MIMO move suppressed and shifted DMC." ISA transactions 44(4): 465-479.
    Discrete-time controller and closed-loop transfer functions were developed for move suppressed and the recently formulated m-shifted multiple-input-multiple-output (MIMO) dynamic matrix control (DMC). Using these transfer ...
  • PID gain scheduling using fuzzy logic 

    Blanchett, T. P., G. C. Kember, and R. Dubay. 2000. "PID gain scheduling using fuzzy logic." ISA transactions 39(3): 317-325.
    A simple, yet robust and stable alternative to proportional, integral, derivative (PID) gain scheduling is developed using fuzzy logic. This fuzzy gain scheduling allows simple online duplication of PID control and the ...
  • The Lorenz-Krishnamurthy slow manifold 

    Fowler, A. C., and G. Kember. 1996. "The Lorenz-Krishnamurthy slow manifold." Journal of the Atmospheric Sciences 53: 1433-1437.
    The authors scale the five-mode model introduced by Lorenz and Krishnamurthy and show how explicit solutions may be obtained in the limit of small Rossby number by using the method of multiple scales. They thus obtain a ...
  • Competition model for aperiodic stochastic resonance in a Fitzhugh-Nagumo model of cardiac sensory neurons 

    Kember, G. C., G. A. Fenton, J. A. Armour, and N. Kalyaniwalla. 2001. "Competition model for aperiodic stochastic resonance in a Fitzhugh-Nagumo model of cardiac sensory neurons." Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 63(4): 419111-419116. doi:10.1103/PhysRevE.63.041911
    A model is presented to access the cause and effect between noisy threshold inputs and the average firing rate generated by neuron. The neural control in the heart in aperiodic stochastic resonance (ASR) was partially ...
  • SISO extended predictive control - Formulation and the basic algorithm 

    Abu-Ayyad, M., R. Dubay, and G. C. Kember. 2006. "SISO extended predictive control - Formulation and the basic algorithm." ISA transactions 45(1): 9-20.
    A new predictive controller is developed that represents a significant change from conventional model predictive control. The method termed extended predictive control (EPC) uses one tuning parameter, the condition number ...
  • On simplified predictive control as a generalization of least-squares dynamic matrix control 

    Kember, G. C., R. Dubay, and S. E. Mansour. 2005. "On simplified predictive control as a generalization of least-squares dynamic matrix control." ISA transactions 44(3): 345-352.
    Simplified predictive control (SPC) of a single-input single-output control scheme is compared to the more sophisticated, least-squares formulation of dynamic matrix control (DMC) and its move-suppressed variant (move-suppressed ...
  • An asymptotic solution for evaluation of stresses in balanced and unbalanced adhesively bonded joints 

    Shahin, Khaled, Guy Kember, and Farid Taheri. 2008. "An asymptotic solution for evaluation of stresses in balanced and unbalanced adhesively bonded joints." Mechanics of Advanced Materials and Structures 15(2): 88-103.
    Adhesively bonding is one of the most commonly and widely used joining methods in various engineering applications. Many fiber-reinforced plastic (FRP) structural components nowadays are joined by adhesives. As a result ...
  • Online optimization of fuzzy-PID control of a thermal process 

    Mansour, S. E., G. C. Kember, and R. Dubay. 2005. "Online optimization of fuzzy-PID control of a thermal process." ISA transactions 44(2): 305-314.
    A constrained optimization of a simple fuzzy-PID (PID—proportional integral derivative) system is designed for the online improvement of PID control performance during productive control runs. The cost function design ...
  • Risk aversion predictive control 

    Kember, G. C., S. E. Mansour, and R. Dubay. 2006. "Risk aversion predictive control." ISA transactions 45(4): 563-574.
    A quality-controlled predictive control method, suitable for control of fast, remote systems subject to significant communication delays, is developed. Each move is quality controlled in that it independently satisfies a ...
  • "Smart" baroreception along the aortic arch, with reference to essential hypertension 

    Kember, G. C., M. Zamir, and J. A. Armour. 2004. ""Smart" baroreception along the aortic arch, with reference to essential hypertension." Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 70(5): 051914-1-051914-5. doi:10.1103/PhysRevE.70.051914
    An arterial model was used to show that the cumulative effects of wave reflections have a surprisingly pronounced effect on the pressure distribution in the root segment of the tree. Global arterial conditions play a role ...
  • A continuous analysis of multi-input, multi-output predictive control 

    Kember, G. C., T. K. Kang, and S. E. Mansour. 2007. "A continuous analysis of multi-input, multi-output predictive control." ISA transactions 46(3): 419-428.
    A continuous formulation and method of analysis is constructed for multi-input, multi-output (MIMO) predictive control and used to compare Dynamic Matrix Control (DMC) with Simplified Predictive Control (SPC). Approximate ...
  • Exponential asymptotics with a small exponent 

    Kember, G. C., A. C. Fowler, J. D. Evans, and S. B. G. O'Brien. 2000. "Exponential asymptotics with a small exponent." Quarterly of Applied Mathematics 58(3): 561-576.
    Analytic and numerical solutions are considered to a simple model problem which contains a surprisingly complicated solution structure. Asymptotic solutions are sought when a parameter that appears as an exponent in the ...
  • KLT-Based quality controlled compression of single-lead ECG 

    Blanchett, T., G. C. Kember, and G. A. Fenton. 1998. "KLT-Based quality controlled compression of single-lead ECG." IEEE Transactions on Biomedical Engineering 45(7): 942-945.
    An electrocardiogram (ECG) compression algorithm based on a combination of the Karhunen-Loeve transform (KLT) and multirate sampling is introduced. The use of multirate sampling reduces KLT computational times to those ...
  • An alternate algorithm for computing Adomian polynomials in special cases 

    Biazar, J., E. Babolian, G. Kember, A. Nouri, et al. 2003. "An alternate algorithm for computing Adomian polynomials in special cases." Applied Mathematics and Computation (New York) 138(2-3): 523-529.
    An alternate algorithm for computing Adomian polynomials in special cases was introduced. The algorithm could be extended for calculating Adomian polynomials in several variables. Analysis showed that this algorithm does ...
  • Mechanism of smart baroreception in the aortic arch 

    Kember, G. C., J. A. Armour, and M. Zamir. 2006. "Mechanism of smart baroreception in the aortic arch." Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 74(3). doi:10.1103/PhysRevE.74.031914
    A mechanism is proposed by which the patch of baroreceptors along the inner curvature of the arch of the aorta can sense hemodynamic events occurring downstream from the aortic arch, in the periphery of the arterial tree. ...
  • Control of cardiac function and noise from a decaying power spectrum 

    Kember, G. C., J. A. Armour, G. A. Fenton, and A. Malhotra. 2004. "Control of cardiac function and noise from a decaying power spectrum." Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 70(2): 021909-1-021909-9. doi:10.1103/PhysRevE.70.021909
    The transduction capability of cardiac affected neurons situated to the heart to control cardiac function was described. It was observed that the through in situ cardiac afferent activity shows evidence of independent and ...
  • Multiple scales analysis of water hammer attenuation 

    Han, S. Y., D. Hansen, and G. Kember. 2011. "Multiple scales analysis of water hammer attenuation." Quarterly of Applied Mathematics 69(4): 677-690.
    A multiple scales analysis is used to construct a uniformly accurate approximation to water hammer pressure wave attenuation that is initiated by a sudden valve opening. The method of analysis is well suited to the study ...
  • Small exponent asymptotics 

    Fowler, A. C., G. Kember, and S. G. Brien. 2000. "Small exponent asymptotics." IMA Journal of Applied Mathematics (Institute of Mathematics and Its Applications) 64(1): 23-38.
    We study the surprisingly complicated asymptotic character of a simple first-order differential equation, which involves a term with a low exponent of the dependent variable. While numerical solutions and straightforward ...
  • Matched asymptotic expansions of unbalanced adhesive joints 

    Kember, G., and K. Shahin. 2013. "Matched asymptotic expansions of unbalanced adhesive joints." Journal of Engineering Mechanics 139(10): 1387-1394.
    A matched asymptotic expansion analysis is used to determine the dependence of shear stress boundary layer thickness on adhesive properties in unbalanced single-lap joints. A uniformly accurate expansion of shear stress, ...

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