Please use this identifier to cite or link to this item:
|Model predictive control for production scheduling problem in flexible manufacturing system
|Engineering::Electrical and electronic engineering::Control and instrumentation::Control engineering
|Nanyang Technological University
|Xiao, Z. (2022). Model predictive control for production scheduling problem in flexible manufacturing system. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/164078
|Production scheduling in flexible manufacturing systems aims at obtaining an operational decision such as machine processing sequence, to achieve a production goal like minimum cost or makespan (i.e. total processing time), given the available resources. This dissertation presents a method to solve such problems based on Petri Net (PN) and Model Predictive Control (MPC). After reviewing the existing methods in the literature, a method to simplify the PN model is proposed, resulting in a more compact PN model with reduced dimensions. Next, there are three model structures provided, each with two types of numerical expressions in the form of state space model. The three model structures are PN with unit production time, PN with non-unit production time, and modular PN. PN with unit production time refers to cases where the production time for each unit is the same, while PN with non-unit production time refers to cases where the production time for each unit may be different, and modular PN uses a systematic way to organise the problem information. The two numerical expressions are model one for simplicity and model two for dimension reduction. Then, based on the modelling method, MPC is capable of working out most kinds of production scheduling problems in the flexible manufacturing system. Finally, a fundamental scheduling example and a real production case are simulated to validate the sufficiency and merits of the proposed framework.
|School of Electrical and Electronic Engineering
|Appears in Collections:
Files in This Item:
|Model Predictive Control for Production Scheduling Problem in Flexible Manufacturing System.pdf
Updated on Mar 3, 2024
Updated on Mar 3, 2024
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.