Optimal robotic cell scheduling with controllers using mathematically based timed Petri nets

Al-Ahmari, Abdulrahman

doi:10.1016/j.ins.2015.09.053

Cited by 28 publications

(8 citation statements)

References 54 publications

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“…Guo et al propose an adaptive collaborative timed colored Petri net model of the production logistics system in the internet environment and demonstrated that the method is superior to the events-driving method [22]. Considering the movement path of the robot between base stations, Al-Ahmari et al propose the use of time-delay petri net (TdPN) to optimize the robot motion controller in the robot scheduling problem, and demonstrated the effectiveness through a mathematical model [23]. Yianni et al use Petri net to build model to inspect different modules.…”

Section: Introductionmentioning

confidence: 99%

A study of the layout planning of plant facility based on the timed Petri net and systematic layout planning

et al. 2020

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The purpose of this research is to solve the problems of unreasonable layout of the production plant, disorder of the logistics process, and unbalanced production line in discrete manufacturing plants. By analyzing the production process and characteristics, the timed Petri net model is constructed according to the function and connection of each production unit, which is then used to generate a FlexSim simulation model of the production plant logistics system with a simulation software. Therewith the FlexSim simulation model is used to simulate the original layout of the plant, and to analyse the simulation data synthetically to put forward an improvement strategy. Combined with the use of the systematic layout planning method to analyze the overall layout of the plant and logistics relations, we infer the relevant drawings between the production units and determine the improved layout of the facilities. Finally, by comparing the before and after improvement simulation results, it is verified that the combination of timed Petri nets and systematic layout planning is effective to ameliorate the layout of the plant facilities and the logistics system. This method makes up for the factors that traditional methods have not considered, achieves the goal of reducing the cross circuitous route of the plant and the idle rate of equipment, and improving the efficiency of production.

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Section: Introductionmentioning

confidence: 99%

A study of the layout planning of plant facility based on the timed Petri net and systematic layout planning

et al. 2020

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“…Petri nets have been successfully applied to model dynamic systems in several areas due to their flexibility and high accuracy in modelling complex phenomena, including robotics (Al-Ahmari, 2016), optimization of manufacturing systems (Chen et al, 2014;Uzam et al, 2015), business process management (van der Aalst, 2002), and human computer interaction (Tang et al, 2008). Table 1 summarizes various research works using Petri nets to model maintenance and life-cycle approaches.…”

Section: Introductionmentioning

confidence: 99%

Stochastic maintenance models for ceramic claddings

Ferreira

Neves

Silva

et al. 2019

Structure and Infrastructure Engineering

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Maintenance decision-making involves a series of multiple objectives, some of them contradictory. Usually, stakeholders intend to find the optimal maintenance strategy, to minimize the economic burden, while simultaneously maximizing the buildings' performance. In this study, a condition-based maintenance model, based on Petri nets, is proposed to evaluate the consequences of alternative maintenance strategies to maintain and improve the performance of ceramic claddings. This maintenance model is a full lifecycle model that integrates the stochastic assessment of the degradation condition of the claddings, and also inspections, maintenance and renewal processes. Three maintenance strategies are considered: (i) major intervention only; (ii) combination of minor and major interventions; and (iii) combination of cleaning operations, minor and major interventions. The uncertainties associated with the degradation process, as well as with the definition of the effects of maintenance actions are considered by modelling the transitions times in Petri nets as random variables. Considering the complexity of Petri nets, the statistical descriptors of the performance of the assets (e.g. mean condition, probability of applying maintenance) were computed using Monte Carlo simulation. The impact of the different maintenance strategies in the claddings' service life is discussed, comparing the different alternatives also from an economic point of view.

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“…Recently, many studies are focused on optimal process planning of manufacturing systems modeled by timed Petri nets . For instance, presents an optimal solution to the robotic cell scheduling problem for robot movement controllers using timed PNs. The suggested approach is used to generate an optimal sequence of transitions based on a mathematical transition model.…”

Section: Introductionmentioning

confidence: 99%

Suboptimal time management of discrete event systems with uncontrollable events modeled by Petri nets

Yazdani

Dideban

2019

Asian Journal of Control

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Preventing systems from entering to forbidden states is a crucial issue in discrete event systems control. Adding supervisors to the system is a common method to avoid entering to forbidden states. In discrete event systems modeled by Petri net adding a supervisor could be done by means of control places. Since, the time is not considered in designing this supervisor, in presence of uncontrollable transitions adding control places can lead to increase the operation time of the system modeled by timed Petri net. Because, the firing of some transitions is prevented when it is not necessary. So, to design a more efficient controller, we will be required to use time information of the system component. Therefore, in this paper, a method for optimizing the time behavior of a supervised timed Petri net will be proposed. To obtain an efficient operation, some timed places as timer will be added to the net. The time of this timer places is calculated to permit firing of some controllable transitions in order to enter into some weakly forbidden states while entering to forbidden states is prevented. This concept leads to increase the speed of system as well as obtain an acceptable operation. This method can be applied for all systems modeled by Petri nets. The efficiency of proposed approach will be discussed and validated with a case study.

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Optimal robotic cell scheduling with controllers using mathematically based timed Petri nets

Cited by 28 publications

References 54 publications

A study of the layout planning of plant facility based on the timed Petri net and systematic layout planning

A study of the layout planning of plant facility based on the timed Petri net and systematic layout planning

Stochastic maintenance models for ceramic claddings

Suboptimal time management of discrete event systems with uncontrollable events modeled by Petri nets

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