Closed-loop simulation of workload control : integrating input-output regulation with feedback

Oliveira, Allan Freitas (author), Sagawa, Juliana Keiko (author), Mušič, Gašper (author)

When responsiveness to demand fluctuations is a key performance factor, continuous dynamic models can advantageously replace discrete event simulation, often employed in Workload Control (WLC) studies. Nonetheless, dynamic modelling tools and feedback control are scarcely applied to WLC or other shop floor control systems. To fill this gap, this paper presents a closedloop model of WLC incorporating feedback control and shop floor inputoutput control. The bond graphs’ dynamic modelling technique is employed. The model is implemented in Simulink® and its behaviour in face of disturbances is analysed. The load of the machines and of the job pool of WLC is considered to adjust order release (input control). The capacity of each machine (output control) is altered in function of the level of its preceding buffer. The machines’ processing rates stabilize and the reference levels for the buffers are reached when a step disturbance in order entry is simulated. Also, the system responded with a maximum capacity increment of 15 % when cyclic demand is simula

• Language: English
• Keywords: workload control, closed-loop systems, simulation, smart production systems, control theory, bond graphs, input-output control, shop floor
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 29-42
• Numbering: Vol. 20, no. 1
• PID: 20.500.12556/RUL-170765
• UDC: 681.5
• ISSN on article: 1854-6250
• DOI: 10.14743/apem2025.1.525
• COBISS.SI-ID: 242590979
• Publication date in RUL: 15.07.2025

Record is a part of a journal

• Title: Advances in production engineering & management
• Shortened title: Adv produc engineer manag
• Publisher: Fakulteta za strojništvo, Inštitut za proizvodno strojništvo
• ISSN: 1854-6250
• COBISS.SI-ID: 229859072

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: vodenje obremenitve, zaprtozančni sistemi, simulacija, pametni proizvodni sistemi, teorija vodenja, grafi povezav, vhodno-izhodno vodenje, delavnica