Optimal and sub-optimal control of linear processes with or without deadtime and application to an actual heat exchanger /
| Main Author: | |
|---|---|
| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
[College Station, Tex.] :
Huang,
1977.
|
| Subjects: | |
| Online Access: | Link to OAKTrust copy Link to ProQuest copy |
| Abstract: | Optimal control of continuous-time linear systems are usually developed using Riccati equations. For the discrete-time case, both the dynamic programming method and the discrete Riccati equation have been used to develop the optimal control law. Here, the discrete Riccati equation approach was used to develop the proportional plus integral optimal control law for the general linear system without deadtime, involving both set-point changes and physical (load) disturbances. The optimal control law developed was compared with the results using the dynamic programming method. In addition to a reduction in computer memory required, the method was found to use much less computer time for control law computation. The optimal P-I control for systems without deadtime was then extended to the cases of systems with deadtimes in the control inputs and in physical disturbances. The control law does not require prediction of the physical disturbance if the deadtime in the control path is less than or equal to that in the disturbance path. Simulation studies showed that the optimal control performed much better than conventional P-I control.. |
|---|---|
| Item Description: | Vita. "Major subject: Chemical Engineering." |
| Physical Description: | xxi, 164 leaves : graphs ; 28 cm |
| Bibliography: | Includes bibliographical references (leaves 157-160). |