Multivariable nonlinear adaptive control for petroleum refineries | |
| Author | Nguyen The Hoan |
| Call Number | AIT Thesis no.ISE-02-28 |
| Subject(s) | Petroleum refineries Petroleum--Refining Nonlinear control theory |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ISE-02-28 |
| Abstract | Distillation is one of the most important unit operations in the chemical and petroleum industries. In the thesis, a gasoline refinery is studied with highly strict operating conditions. A unified framework is implemented for obtaining integrated process and control system designs, which are orientated towards economic optimization, and able to cope with parametric uncertainty and process disturbances. Process systems are modelled using mathematical models; variations include both uncertain parameters and time-varying disturbances. Process simulation is written with Matlab Simulink to attain steady-state data for control system design. Distillation processes are truly multivariable and nonlinear, in which there exist coupling and long dead times. Thus the effectiveness of conventional PID control is limited, and model-based multivariable control is a good alternative. For such processes, the process control system inevitably includes adjustable controller settings that facilitate process operation over a wide range of conditions. The adaptive controllers, which have been extensive interest in recent years, have special ability to automatically adjust their controller settings to compensate for unanticipated changes in the process or in the environment. In the thesis, the multivariable adaptive controllers are synthesized with two methods in which the difficult control problems are increasing. The parametric design and simulation of the MRAC systems are implemented with Matlab. Their simulations are shown demonstrating them as systematic, flexible approaches for dealing with nonlinearities, external disturbances and process parameter disturbances. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ISE-02-28 |
| Type | Thesis |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Afzulpurkar, Nitin V.; |
| Examination Committee(s) | Bohez, Erik L. J.;Huynh Ngoc Phien;Belforte, Gustavo; |
| Scholarship Donor(s) | Petro Vietnam Corporation; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |