Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/F7536E94-13AC-4CF4-AF60-B66B1DB7692E | ||
| Year | 2024 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Angeliki-Maria Evangelatou, "Application of model predictive control in problems related to car suspension and CSTR reactor operation", Diploma Work, School of Production Engineering and Management, Technical University of Crete, Chania, Greece, 2023 https://doi.org/10.26233/heallink.tuc.99140 | ||
| Appears in Collections |
The purpose of this thesis is to introduce the concept of Predictive Control based on a process model. It is a form of advanced control that aims to find the optimal sequence of future control actions, based on simulating the system's behavior and real process data. Initially, the basic points of its theory are presented, such as the strategy followed, the optimization problem solved, and the design parameters of a predictive controller. Then, two examples of its application in a Matlab environment (simulations) are provided, along with detailed instructions for their implementation and evaluation. The first example concerns the model of a CSTR reactor, while the second one involves a vehicle suspension model. The simulations described below demonstrate the behavior of the two systems with changes in various parameters such as the controller horizon, constraints, controller weights, and disturbances. In this way, the purpose of this thesis is to improve the controller's performance and achieve rapid and effective disturbance elimination. Specifically for the first application, a constraint is applied and the desired value of the refrigerant temperature is applied, i.e., it has a limited range of Kelvin degrees compared to its nominal value and a limited rate of change of Kelvin degrees per second. Also, the disturbance applied in this application is the increase in feed concentration, which is eliminated quite quickly. For the second application, the desired value of the difference in position between the suspended mass and the position of the mass without suspension is applied, i.e., this difference is maintained at a specific value. Also, the disturbance applied in this application is the increase in surface irregularity of the pavement, which is eliminated quite quickly.
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