Property Patterns for the Formal Verification of Automated Production Systemsstar;

Campos, José Creissac; Machado, José; Seabra, Eurico

doi:10.3182/20080706-5-kr-1001.00858

Cited by 20 publications

(20 citation statements)

References 13 publications

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“…An intermediate solution can be the use of patterns, which provides an easy-to-understand formalism with the possibility of automatic formalization. This approach is similar to the idea proposed by Campos et al (2008), but more complex patterns have been created supporting state changes, timed behaviour, etc., to cover the real-life needs. The first step of this methodology is the formalization of the requirements.…”

Section: Methodsmentioning

confidence: 99%

Bringing Automated Model Checking to PLC Program Development — A CERN Case Study —

Adiego

Darvas

Tournier

et al. 2014

IFAC Proceedings Volumes

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Verification of critical software is a high priority but a challenging task for industrial control systems. Model checking appears to be an appropriate approach for this purpose. However, this technique is not widely used in industry yet, due to some obstacles. The main obstacles encountered when trying to apply formal verification techniques at industrial installations are the difficulty of creating models out of PLC programs and defining formally the specification requirements. In addition, models produced out of real-life programs have a huge state space, thus preventing the verification due to performance issues. Our work at CERN (European Organization for Nuclear Research) focuses on developing efficient automatic verification methods for industrial critical installations based on PLC (Programmable Logic Controller) control systems. In this paper, we present a tool generating automatically formal models out of PLC code. The tool implements a general methodology which can support several input languages, like the PLC programming languages defined in the IEC 61131 standard, as well as the model formalisms of different model checker tools. The tool supports the three main stages of model checking: system modelization, requirement formalization and counterexample analysis. In addition, a verification case study of a PLC program, written in Structured Text (ST) language implemented at CERN is described. The paper shows that the verification process is automatized and supported by the proposed tool, thus its difficulty is completely hidden for the control engineer.

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Section: Methodsmentioning

confidence: 99%

Bringing Automated Model Checking to PLC Program Development — A CERN Case Study —

Adiego

Darvas

Tournier

et al. 2014

IFAC Proceedings Volumes

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“…In [24] and [25], Campos et al propose a collection of domain-specific specification patterns for automated production systems, based on property data collected from literature. In [26], Monteiro et al propose a set of patterns for cellular interaction networks.…”

Section: A Property Patternsmentioning

confidence: 99%

User-friendly formal specification languages - conclusions drawn from industrial experience on model checking

Pakonen

Pang

Buzhinsky

et al. 2016

2016 IEEE 21st International Conference on Emerging Technologies and Factory Automation (ETFA)

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Formal methods -such as model checking -have definite advantages over more commonplace verification techniques. By providing proof of the analyzed systems' correctness, they are especially useful in domains that are under regulatory supervision, like the nuclear industry. The foremost challenge for wider adoption of model checking is the effort and the expertise required for formalizing functional requirements into verifiable properties. A particular challenge in verifying the application software of industrial process control systems is taking into account the different sequencing and timing issues that arise from, e.g., the dynamic behavior of the plant processes being controlled. In this paper, we review specification languages that are aimed at making formal methods more accessible. We have collected 1079 sample formal properties from practical model checking projects in the nuclear industry, and identified repeatedly occurring property types. We present our findings, and based on the sample data, evaluate the applicability of different approaches on user-friendly property specification.

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“…In some critical applications, some analysis techniques [5][6][7][8][9] of the used controllers can be used, as in the case of critical systems for other applications.…”

Section: Introductionmentioning

confidence: 99%

Mechatronic System for Drying Human Body After Bath

2017

IJOMAM

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-From several tasks needed for taking care of disabled and/or bedridden people, bath is one of them. After bath, of those persons, one of most important tasks is related with during the human body, mainly in users with reduced mobility. Those users need some specific assisting devices that can help them performing drying their own body after bath. Existing devices, for those purposes are not satisfying those people for several reasons that are explained on this paper. The main added value of this paper is the proposition of a mechatronic device for performing those tasks, related with human body drying, and covering some gaps detected when other similar systems have been analysed. An equipment, for being attractive in this domain, must combine three main requirements: comfort, efficiency and safety. Those three characteristics were always taken in consideration during the design of the proposed solution. That solution is presented in this paper as a future and it is expected that can to solve the majority of the identified problems in the mentioned context. A conceptual model of the proposed solution is presented.

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Property Patterns for the Formal Verification of Automated Production Systemsstar;

Cited by 20 publications

References 13 publications

Bringing Automated Model Checking to PLC Program Development — A CERN Case Study —

Bringing Automated Model Checking to PLC Program Development — A CERN Case Study —

User-friendly formal specification languages - conclusions drawn from industrial experience on model checking

Mechatronic System for Drying Human Body After Bath

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