Time-Based Estimator for Control Reconfiguration of Discrete Event Systems (DES)

Tahiri, Imane; Carré-Ménétrier, Véronique; Tajer, Ali

doi:10.1109/codit.2019.8820585

Cited by 5 publications

(4 citation statements)

References 32 publications

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“…A reconfiguration process implementation depends on the trigger event and the time constraints exerted on the system when the event takes place. Two further situations can be considered: (i) the initiation of a new production process when the system is in a halted state and (ii) a system failure occurs during operation [36]. The proposed approach in this paper is within the second case.…”

Section: Results Principle Of the Proposed Methodology For The Contro...mentioning

confidence: 99%

A Fault-Tolerant and Reconfigurable Control Framework: Modeling, Design, and Synthesis

2023

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Manufacturing systems (MS) have become increasingly complex due to constraints induced by a changing environment, such as flexibility, availability, competition, and key performance indicators. This change has led to a need for flexible systems capable of adapting to production changes while meeting productivity and quality criteria and reducing the risk of failures. This paper provides a methodology for designing reconfigurable and fault-tolerant control for implementation in a Programmable Logic Controller (PLC). The main contribution of this methodology is based on a safe control synthesis founded on timed properties. If a sensor fault is detected, the controller switches from normal behavior to a degraded one, where timed information replaces the information lost from the faulty sensor. Switching between normal and degraded behaviors is ensured through reconfiguration rules. The primary objective of this method is to implement the obtained control into a PLC. In order to achieve this goal, a method is proposed to translate the controllers of the two behaving modes and the reconfiguration rules into different Grafcets. This approach relies on the modular architecture of manufacturing systems to avoid the combinatorial explosion that occurs in several approaches.

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Section: Results Principle Of the Proposed Methodology For The Contro...mentioning

confidence: 99%

A Fault-Tolerant and Reconfigurable Control Framework: Modeling, Design, and Synthesis

2023

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“…The input and output signals of the controllers are the same. In control reconfiguration, the controller or its input and output signals are susceptible to change during faults, as in the work by Tahiri et al (2019).…”

Section: Introductionmentioning

confidence: 99%

Deep-learning-based design of active fault-tolerant control for automated manufacturing systems subjected to faulty sensors

El-Mahdy,

Awad,

Maged

2024

Transactions of the Institute of Measurement and Control

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This research paper proposes a new implementation of a long short-term memory network for active fault-tolerant control subjected to single and multiple undiagnosable sensor faults. There are two networks used: the first performs as a diagnosis for automated manufacturing systems and can identify faulty sensors, while the second acts as an inverse model of these systems and is used to determine the reconfigured control action to take when sensors are not functioning as expected. The Factory I/O simulator is interfaced with MATLAB to simulate and verify the proposed approach for automated material handling case study with faultless and multiple fault sensors. Four sensors of the case study out of six are tolerated.

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“…The reconfiguration process consists of changing the current state of the system from the normal behavior controller to a target state belonging to the so-called degraded behavior controller (Figure 1) in order to maintain the operation of the system despite the faults (fault-tolerant control) which may hinder it. The information lost due to a faulty sensor is replaced with the information provided by timed estimators that describe the estimated operation of the sensor using training [4]. In this work, we apply our method in the case of sensor fault detection.…”

Section: Introductionmentioning

confidence: 99%

A Fault-Tolerant and a Reconfigurable Control Framework: Application to a Real Manufacturing System

2022

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In this paper, we propose a framework to implement a fault-tolerant and a reconfigurable distributed control approach in programmable logic controller (PLC) for manufacturing systems (MS). The reconfiguration methodology adopted in this paper is based on supervisory control theory (SCT), and it is triggered following sensor fault detection. The lost information about these sensors is replaced by timed information allowing the MS to continue its operations. The switch from a normal behavior to a degraded behavior when a sensor fault appears is ensured by reconfiguration rules. The main objective of our framework is to implement the obtained control into a PLC. To meet this objective, the distributed controllers of the two operating modes as well as the reconfiguration rules are interpreted into different Grafcet models. The implementation of these different models is verified by a checker-model technique before being tested on a digital twin and validated on a real MS.

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Time-Based Estimator for Control Reconfiguration of Discrete Event Systems (DES)

Cited by 5 publications

References 32 publications

A Fault-Tolerant and Reconfigurable Control Framework: Modeling, Design, and Synthesis

A Fault-Tolerant and Reconfigurable Control Framework: Modeling, Design, and Synthesis

Deep-learning-based design of active fault-tolerant control for automated manufacturing systems subjected to faulty sensors

A Fault-Tolerant and a Reconfigurable Control Framework: Application to a Real Manufacturing System

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