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- Philip D. Loewen
- 1994

We consider a Mayer problem of optimal control, whose dynamic constraint is given by a convex-valued differential inclusion. Both state and endpoint constraints are involved. We prove necessaryâ€¦ (More)

- R. Bhushan Gopaluni, Michael S. Davies, Philip D. Loewen, Guy A Dumont
- ISA transactions
- 2008

Good cross-directional control of sheet variables in a paper machine depends on a number of factors. One such factor is the correct alignment of actuators with their corresponding responses. Theâ€¦ (More)

- Mahdi Yousefi, Qiugang Lu, +4 authors Johan U. BackstrÃ¶m
- 2015 American Control Conference (ACC)
- 2015

Any discrepancy between a process and the associated model used in control design will compromise closed-loop performance. In almost all current techniques to detect model-plant mismatch inâ€¦ (More)

- Mahdi Yousefi, Michael G. Forbes, R. Bhushan Gopaluni, Philip D. Loewen, Guy Albert Dumont, Johan U. BackstrÃ¶m
- 2014 IEEE Conference on Control Applications (CCAâ€¦
- 2014

Model-based controllers based on incorrect estimates of the true plant behaviour can be expected to perform badly. This work quantifies the performance deterioration for a certain class of MIMOâ€¦ (More)

- Qiugang Lu, Michael G. Forbes, R. Bhushan Gopaluni, Philip D. Loewen, Johan U. BackstrÃ¶m, Guy Albert Dumont
- IEEE Transactions on Control Systems Technology
- 2017

The minimum variance controller has been extensively used as a benchmark in the performance assessment of both univariate and multivariate control loops when time delay is the fundamental performanceâ€¦ (More)

A. Second-Order Necessary Conditions Consider the basic problem min Î›[x] := b a L (t, x(t), Ë™ x(t)) dt : x(a) = A, x(b) = B. (P) If x gives a directional local minimum, and y is any arc in V II = {yâ€¦ (More)

- Philip D. Loewen
- Gene
- 1996

Escherichia coli produces two catalases or hydroperoxidases, HPI and HPII. HPI is a bifunctional catalase-peroxidase active as a tetramer of identical 80049-Da subunits encoded by katG. Theâ€¦ (More)

The practical effectiveness of Thm. A.1 is roughly commensurate with the difficulty of its proof. That is, the proof is essentially trivial, and the condition is nearly useless. There are very fewâ€¦ (More)

This paper studies the possible application of Iterative Feedback Tuning (IFT) to the paper machine cross-directional (CD) control. Although the CD control is naturally a multiinput-multi-outputâ€¦ (More)

In abstract terms, the Calculus of Variations is a subject concerned with max/min problems for a real-valued function of several variables. Given a vector space V and a function Î¦:V â†’ R, we exploreâ€¦ (More)