| Título: | Optimal control for a CTMP process with simulated annealing |
| Autores: | Qing, Shuping, 1969- |
| Fecha: | 1999 |
| Publicador: | McGill University - MCGILL |
| Fuente: |
 |
| Tipo: | Electronic Thesis or Dissertation |
| Tema: | Engineering, Electronics and Electrical. |
| Descripción: |
In this thesis, a problem of optimal control for a CTMP(chemi-thermo-mechanical pulping) process is formulated and solved by applying simulated annealing algorithm. Based on priori knowledge accumulated from years of practical operations, a set of imprecise and empirical equations are derived to give a description of a CTMP process. The system dynamics which is a key actor in this process control is also presented and analyzed. Due to the imprecise and highly nonlinear characteristic of this system, the need for a proper global optimization algorithm is highlighted. The application of the simulated annealing algorithm is explored in cases of both the mainline and the whole process control. Comparisons of this method with some other optimization methods are characterized in general in terms of feasibility and accuracy. It is shown from experiments that although it is a time consuming algorithm, simulated annealing is suitable for decision making of process manipulations aiming at maximizing profit. Finally, a PI feedback loop is implemented to fulfill this control scheme of the process. Then, with critical system disturbances and high degree process variance under control, an optimal control law is synthesized for the set-point tracking control policies. The controller performance is investigated at the simulation level. |
| Idioma: | en |
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