Safety of Manufacturing Systems Controllers by Logical Constraints With Safety Filter

Pichard, Romain; Alexandre, Philippot; Saddem, Ramla; Riera, Bernard

doi:10.1109/tcst.2018.2827329

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…Safety aspects are fundamental within the manufacturing sector and represent a research field with great potential and wide application areas [47]. As indicated in Section 3, the linkages between the Digital Twin and safety issues were investigated through a second bibliometric analysis.…”

Section: Bibliometric Results On the Intersection Between The Dt And mentioning

confidence: 99%

Is Digital Twin Technology Supporting Safety Management? A Bibliometric and Systematic Review

2021

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In the Industry 4.0 era, digital tools applied to production and manufacturing activities represent a challenge for companies. Digital Twin (DT) technology is based on the integration of different “traditional” tools, such as simulation modeling and sensors, and is aimed at increasing process performance. In DTs, simulation modeling allows for the building of a digital copy of real processes, which is dynamically updated through data derived from smart objects based on sensor technologies. The use of DT within manufacturing activities is constantly increasing, as DTs are being applied in different areas, from the design phase to the operational ones. This study aims to analyze existing fields of applications of DTs for supporting safety management processes in order to evaluate the current state of the art. A bibliometric review was carried out through VOSviewer to evaluate studies and applications of DTs in the engineering and computer science areas and to identify research clusters and future trends. Next, a bibliometric and systematic review was carried out to deepen the relation between the DT approach and safety issues. The findings highlight that in recent years, DT applications have been tested and developed to support operators during normal and emergency conditions and to enhance their abilities to control safety levels.

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Section: Bibliometric Results On the Intersection Between The Dt And mentioning

confidence: 99%

Is Digital Twin Technology Supporting Safety Management? A Bibliometric and Systematic Review

2021

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“…2) The proposal of a control algorithm which defines, when one or several constraints are violated, a safe outputs vector compliant with all the safety constraints. We have already proposed several algorithms to compute at each PLC scan time a safe outputs vector (Pichard et al, 2016, Pichard et al, 2018. One of them is based on CSP to perform the detection and the correction stages.…”

Section: Boolean Guards For Safe Plc Programmentioning

confidence: 99%

“…However, this approach cannot guarantee deadlock-freeness. Furthermore, since the safety aspects have priority over the functional aspects, the execution of the resulting PLC program may not be compliant to the functional specifications when they violate the safety constraints (Pichard et al, 2018). In a previous paper (Pichard et al, 2016), an original implementation of this safe control synthesis approach based on the use of a CSP (Constraint Satisfaction Problem) solver was proposed.…”

Section: Introductionmentioning

confidence: 99%

Safe PLC Controller Implementation IEC 61131-3 Compliant based on a Simple SAT Solver: Application to Manufacturing Systems

Pichard

Carré-Ménétrier

Riera

2018

Proceedings of the 15th International Conference on Informatics in Control, Automation and Robotics

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In this study, manufacturing systems are considered as Discrete Event Systems (DES) with logical Inputs (sensors) and logical Outputs (actuators). In previous work, an original implementation of safe controllers (using safety logical constraints) for manufacturing systems, based on the use of a CSP (constraint satisfaction problem) solver, was proposed. However, the proposed solution was not IEC 61131-3 compliant. In other words, it was not possible to implement it in a PLC (Programmable Logic Controller). In this paper, a proof of concept IEC 61131-3 compliant has been carried out. To perform this challenge, an original simple CSP -SAT solver in ST (Structured Text) has been developed and programmed. The algorithm has been tested and validated by using a M340 Schneider Electric PLC and a box sorting simulated process using the FACTORY I/O software from the Real Games Company (www.realgames.co). It seems to be the first time that a SAT solver developed for PLC, is used in real time as a part of a PLC program to get a safe controller.

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“…The PLC constitutes one of the main architectures of manufacturing system control and is programmed with standardized languages [11]. By integrating motion control into the PLC, the control system was greatly simplified because simple motion control can be realized by the PLC without a special motion controller [12].…”

Section: Introductionmentioning

confidence: 99%

Plumbing leakage detection system with water level detector controlled by programmable logic controller type Omron CPM2A

Hartanto

Desmayadi

2022

J. Mechatron. Electr. Power Veh. Technol.

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There is a chance of leakage in the plumbing caused by water pressure in the pipes, improper installation of pipe connections, or external influences, such as earthquakes. Plumbing leakage that is detected too late can cause damage to other systems. It is necessary to have a plumbing leakage detection system to detect a leak in the plumbing. Therefore, in this research, a plumbing leakage detection system is designed with a water level detector (WLD) controlled by a programmable logic controller (PLC) type Omron CPM2A. The method used in this research is designing the optimal model form of the system, which is distinguished by designing hardware and software, testing the devices, such as power supply, WLD, and channel relay module (CRM), and making conclusions. From the results of this research, it was found that the system works well in detecting leakage of plumbing, as indicated by all transistors' ability to work well where the electrodes (E1 and E2) are connected by water. The transistor in the WLD module will work as a switch or transistor in the saturation position. In this research, it can be seen that even though there is a leakage from the relay contacts of 1.8 VDC, it is still considered in a safe condition because to provide a trigger to the 3B3D Module, a minimum of 12 VDC is required. In addition, when the relay is not working or off, the measurement at the normally closed (NC) terminal is 12 VDC.

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Safety of Manufacturing Systems Controllers by Logical Constraints With Safety Filter

Cited by 9 publications

References 23 publications

Is Digital Twin Technology Supporting Safety Management? A Bibliometric and Systematic Review

Is Digital Twin Technology Supporting Safety Management? A Bibliometric and Systematic Review

Safe PLC Controller Implementation IEC 61131-3 Compliant based on a Simple SAT Solver: Application to Manufacturing Systems

Plumbing leakage detection system with water level detector controlled by programmable logic controller type Omron CPM2A

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