The real-time supervisory control of an experimental manufacturing cell

Brandin, B.A.

doi:10.1109/70.481746

Cited by 115 publications

(48 citation statements)

References 32 publications

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“…Moreover, we have exploited the structural properties of the transition structure of the discrete event model obtained by abstraction and developed a new algorithm for computing the supremal controllable sublanguage customized to this particular application, which achieves greater efficiency than the standard one. This work constitutes a new application area of DES theory, beyond those in manufacturing and software for instance (see, e.g., [17], [18], [19], [20]), with the distinctive feature that the DES model is obtained by abstraction from a continuous one, not by direct modeling of the discrete transition structure. Current issues of interest include refinement of our methodology to handle continuous models with second order dynamics, imperfect state information, acceleration constraints, and further algorithmic improvements.…”

Section: Discussionmentioning

confidence: 99%

Supervisory control for collision avoidance in vehicular networks using discrete event abstractions

Dallal

Colombo

Vecchio

et al. 2016

Discrete Event Dyn Syst

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Abstract-We consider the problem of collision avoidance at vehicular intersections for a set of controlled and uncontrolled vehicles that are linked by wireless communication. Each vehicle is modeled by a first order system. We use a disturbance to account for bounded model uncertainty. We construct a discrete event system abstraction and formulate the problem in the context of supervisory control for discrete event systems with uncontrollable events. This allows us to mitigate computational limitations related to the presence of continuous dynamics and infinite state spaces. For solving the resulting supervisory control problem at the discrete event level, we develop an algorithm that exploits the structure of the transition map to compute the supremal controllable sublanguage more efficiently than standard algorithms. We present implementation results on an intersection with several vehicles.

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Section: Discussionmentioning

confidence: 99%

Supervisory control for collision avoidance in vehicular networks using discrete event abstractions

Dallal

Colombo

Vecchio

et al. 2016

Discrete Event Dyn Syst

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“…Indeed, it means that the controller must react to a given input by emitting an output before a new input occurrence. Assuming this hypothesis is verified, this interpretation can be applied for implementation of SCT supervisors (Brandin 1996, Niel et al 2001.…”

Section: Control Systemmentioning

confidence: 99%

Pragmatic approach for modular control synthesis and implementation

Gouyon

Pétin

Gouin

2004

International Journal of Production Research

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Abstract:Within the framework of Supervisory Control Theory, synthesis algorithms enable automatic generation of control rules from behavioural models of the process to be controlled and of goals to be achieved. This paper talks about a pragmatic use of these algorithms within an automation engineering context and focuses on two key issues: process and goals modelling and supervisory controller implementation. In this way, the approach presented in this paper combines the synthesis techniques and algorithms with an object-oriented automation method that supplies guidelines for the analysis, the design and the implementation of a modular control system. This pragmatic approach is applied to the synthesis and implementation of the control of an assembly station. It highlights the difficulties of the modelling step and its great influence on the synthesis result itself but also demonstrates the feasibility of our synthesis approach through a successful implementation in conformance with the IEC 61131-3 standard.

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“…39 literature [4,5,7,8,11,12] . This paper proposed a main controller based on a DES using SCT in order to address situations in which, a main is requested to not only control each process separately but also to control sequencing of processes without conflict.…”

Section: Journal Of the Korean Society Of Manufacturing Technology Enmentioning

confidence: 99%

New Modularization Method to Design Supervisory Control of Automated Laboratory Systems

Jung¹

2014

Journal of manufacturing engineering & technology

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ARTICLE INFO ABSTRACT Article history:This paper describes the application of discrete event systems theory to the design of an automated laboratory system. Current automated laboratory systems typically consist of several interacting processes that must be carefully sequenced to avoid any possible process conflicts. Discrete Event Systems (DES) theory and Supervisory Control Theory (SCT) can be applied together as effective methods of modeling the system dynamics and designing supervisory controllers to precisely sequence the many processes that such systems might involve. Classical approaches to supervisory controller design tend to result in complex controller structures that are difficult to implement, maintain, and upgrade. In this paper, a new approach to designing supervisory controllers for automated laboratory systems is introduced. This new approach uses a modular controller structure that is easier to implement, maintain, and upgrade,and deals with "state explosion" issues in a novel and efficient way.

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The real-time supervisory control of an experimental manufacturing cell

Cited by 115 publications

References 32 publications

Supervisory control for collision avoidance in vehicular networks using discrete event abstractions

Supervisory control for collision avoidance in vehicular networks using discrete event abstractions

Pragmatic approach for modular control synthesis and implementation

New Modularization Method to Design Supervisory Control of Automated Laboratory Systems

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