Scratch-Based User-Friendly Requirements Definition for Formal Verification of Control Systems

Grobelna, Iwona

doi:10.15388/infedu.2020.11

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…The only thing the designer has to do is to describe a net (or a subnet) in text form (the verifiable model is then generated) and to prepare the list of requirements. These are usually delivered in the form of the temporal logic formulas, but it is also possible (when needed, e.g., in the case of a user-centred design where the customer is involved in the development process) to simplify the requirement definition process by using the alternate forms, such as a user-friendly Scratch-based definition [ 71 ].…”

Section: Case Study Example Of the Proposed Methodsmentioning

confidence: 99%

Determinism in Cyber-Physical Systems Specified by Interpreted Petri Nets

Wiśniewski

Grobelna

Karatkevich

2020

Sensors

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In this paper, we study selected aspects of determinism in the control part of a cyber-physical system (CPS) that is specified by a Petri net-based model. In particular, the control interpreted Petri nets (CIPNs) are applied, which are an extension of the ordinary Petri nets, supplemented by signals (related to sensors and actuators) that permit communication with the environment. The notions of weak and strong determinism in a system described by a CIPN are introduced in the paper. The proposed concepts are supported by formal definitions and theorems. Moreover, a novel modelling methodology for a deterministic system specified by a CIPN is proposed. The presented solutions are illustrated by a case study example of a real-life cyber-physical system. Finally, the results of experimental verification of the proposed determinism-based techniques are demonstrated and discussed.

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Section: Case Study Example Of the Proposed Methodsmentioning

confidence: 99%

Determinism in Cyber-Physical Systems Specified by Interpreted Petri Nets

Wiśniewski

Grobelna

Karatkevich

2020

Sensors

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“…Mainly due to their graphical modeling approach, which makes them flexible and more human-oriented than, for example, text-based or mathematical-based notation techniques, semi-formal (visual) methods have been very popular [1][2][3]. Most of them allow for the modeling of various system view points at different abstraction levels including, for instance, models specifying user requirements, system and architectural design.…”

Section: Introductionmentioning

confidence: 99%

An Improved User Requirements Notation (URN) Models’ Construction Approach

Dongmo

Poll

2023

Systems

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Semi-formal software techniques have been very successful in industry, government institutions and other areas such as academia. Arguably, they owe a large part of their success to their graphical notation, which is more human-oriented than their counterpart text-based and formal notation techniques. However, ensuring the consistency between two or more models is one of the known challenges of these techniques. This work looks closely at the specific case of the User Requirements Notation (URN) technique. Although the abstract model of URN provides for link elements to ensure the consistency between its two main components, namely, Goal-Oriented Requirement Language (GRL) and Use Case Maps (UCM), the effective implementation of such links is yet to be fully addressed. This paper performs a detailed analysis of the existing URN models construction process and proposes an improved process with some guidelines to ensure, by construction, the correctness and consistency of the GRL and UCM models. A case study is used throughout the paper to illustrate the suggested solution.

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“…There are some approaches that may enrich the learning process, mainly by using some dedicated tools or other user-friendly forms, like interactive games or applications. In our previous paper, we proposed a Scratch-based method of requirements definition for control systems verification (Grobelna, 2020). That study showed that when using Scratchit is easier for the students to define the requirements, in comparison to conventional temporal logic formulas.…”

Section: Introductionmentioning

confidence: 99%

Help students learn interpreted Petri nets with Minecraft

Grobelna¹,

Mazurkiewicz²,

Janus³

2022

Informatics in Education

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Background: Petri nets are a formal specification technique for modelling of control processes and modern flexible manufacturing systems. Interpreted Petri nets take into account input and output signals, allowing to apply them in any control system or even in control part of a cyber-physical system. Due to the fact that Petri nets are not used in the industrial practice, the students sometimes lack motivation to learn them. Contributions: In the paper we propose how to help students learn interpreted Petri nets with Minecraft (as a game-based learning). We show how interpreted Petri nets can be modelled in Minecraft and how they communicate with the surrounding environment via input and output signals to visualize control processes. The proposed approach has been validated experimentally among university students. Hypotheses: (1) Creating interpreted Petri net models with Minecraft helps to understand the basic principles; (2) Minecraft makes the course more attractive. Methodology: Students were divided into an experimental group (with game-based learning) and a control group (with traditional learning). The experimental group filled in a knowledge test twice (on the entry and on the exit) and a questionnaire. The control group filled in the same knowledge test at the end of the course. Findings: The observations confirm that the Minecraft-based teaching of interpreted Petri nets allows to gain better results in final tests, making at the same time the course more attractive and enjoyable.

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Scratch-Based User-Friendly Requirements Definition for Formal Verification of Control Systems

Cited by 6 publications

References 42 publications

Determinism in Cyber-Physical Systems Specified by Interpreted Petri Nets

Determinism in Cyber-Physical Systems Specified by Interpreted Petri Nets

An Improved User Requirements Notation (URN) Models’ Construction Approach

Help students learn interpreted Petri nets with Minecraft

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