Faïda Mhenni

• Dr. Eng.
• Professor (Associate) at ISAE-Supméca - Institut supérieur de mécanique de Paris

Mechatronic systems become ever more complex because of their increasing number of interconnected safety critical components and sophistication. MBSE (Model-based Systems Engineering) and MBSA (Model-Based Safety Assessment) are the most commonly adopted approaches to deal with the design and safety analysis of mechatronic systems. Unfortunately, b...

In the dynamic aviation industry, Aerospace Industries grapple with the intricate challenge of certifying products amidst integration requirements from aerospace manufacturers and airworthiness regulations imposed by aviation authorities. This paper underscores the indispensable role of ModelBased Systems Engineering (MBSE) in addressing the multip...

Technological advances are completely reshaping the world we live in by allowing the design of increasingly sophisticated, fast, accurate systems that serve and assist human beings in different domains. These systems increasingly rely on information technology to process and exchange data to provide enhanced services. Additionally, energy and mater...

In recent decades, there has been a significant increase in systems’ complexity, leading to a rise in the need for more and more models. Models created with different intents are written using different formalisms and give diverse system representations. This work focuses on the system engineering domain and its models. It is crucial to assert a cr...

Nowadays, several manufacturing systems are evolving towards a greater collaboration between human and robots. The development of such systems requires integrated design tasks involving many disciplines and domains such as systems engineering, safety analyses and multi-physics. Furthermore, the increasing presence of multiple and structured require...

In mechatronic collaborative design, there is a synergic integration of several expert domains, where heterogeneous knowledge needs to be shared. To address this challenge, ontology-based approaches are proposed as a solution to overtake this heterogeneity. However, dynamic exchange between design teams is overlooked. Consequently, parametric-based...

Due to the multitude of disciplines involved in mechatronic design, heterogeneous languages and expert models are used to describe the system from different domain-specific views. Despite their heterogeneity, these models are highly interrelated. As a consequence, conflicts among expert models are likely to occur. In order to ensure that these mode...

In a context of growing societal awareness on the carbon footprint and the changing energy landscape, we need to rethink the architecture of future energy systems using new dedicated approaches. Technology advances have shown the relevance of a smart operation of multienergy cyber-physical systems (ME-CPS) requiring a strong cooperation between all...

Nowadays Cyber-Physical-Systems (CPS) are becoming more and more complex, and involve a large number of stakeholders. They all have a different but significant role at a certain phase of the system lifecycle, and they all have an influence on the CPS specifications. This paper gives an overview of a co-design methodology that aims at assisting mult...

Systems engineering relies on a diversity of views of the same system representing the involved domains at different abstraction levels. These views need to be and remain consistent throughout the whole engineering process. To this end, a unified and formal framework is needed to model these different views together with their dependencies and rela...

Large distributed systems such as Multi-Energy Systems are complex systems that can be assimilated to Cyber-Physical Systems of Systems with multiple interactions between different elements and disciplines at different levels. They have the particularity of having dynamic configurations that are subject to multiple factors going from environmental...

With the increasing complexity of systems, engineers have to design an increasing number of models to perform simulation of the product. In this work we intend to compare the system engineering and safety models of a system, and establish a typology of the differences between those models.

The development of a mechatronic system involves different designers having various viewpoints on the overall system to handle its complexity. Consequently, multiple models are created from a variety of domains such as mechanical, electronic, and software engineering. These models use different formalisms, modeling languages, and tools to address s...

To minimize the number of iterations and correction returns while designing a system, sharing crucial parameters and data between different actors is needed. Since mechatronic systems are considered complex because of their multi-disciplines, their design requires collaborative work to ensure the sharing of parameters between contributors from diff...

For a mechatronic system, the lack of robustness is mainly due to an ignorance of variability, which is unavoidable in every designed system at all stages of system development and during its life cycle. In fact, the inherent imperfections of manufacturing processes and operational variations such as material wear or multiphysical effects (thermal,...

The behavior of mechatronics systems has a very complex inter-relation between several components, depending on the magnitudes of their parameters and variables. To ensure a certain level of quality and to improve design robustness, the deviations between actual and target definition should be restricted by specified tolerances. The upper and lower...

Having an increasingly complex set of inter-relations between several components from different domains, mechatronic systems become more and more complex. The behavior of such systems depends on the values of their parameters and variables. A deviation of these values from their expected values affects the overall functioning of the system, degrade...

To face the growing complexity of technical systems, engineers have to design models in order to perform simulations. To avoid inconsistencies, the integration of different models coming from various engineering disciplines is one of nowadays main industrial challenges. In this article we present model synchronization, a framework to ensure consist...

Systems are getting increasingly complex and challenging to design. For safety-critical systems, the integration between model-based systems engineering and model-based safety assessment to improve the choice of the system architecture since the early design stage becomes a necessity. One of the integration solutions is to generate fault trees (FTs...

The goal of the paper is the integration of safety analysis in a model-based systems engineering approach to ensure consistency between system design and safety artifacts. This integration permits the continuous improvement of the structure and behavior of the system. It also reduces system development time and prevents late detection of errors. To...

Today's large distributed energy cyber-physical systems such as power networks with multiple production units are becoming more and more complex due to the increasing share of renewables. They are characterized by long-lived lifecycles that can even be eternal such as electric grids where design and operational phases can overlap. These systems exh...

Ce papier traite la modélisation du boîtier papillon avec différents types de motorisation en utilisant le langage Modelica et l'outil Dymola. Chaque moteur a été modélisé d'une façon particulière. Le moteur à courant continu a été représenté par son schéma électrique équivalent, alors que le moteur synchrone autopiloté a été modélisé en se basant...

Abstract— One of the most critical tasks in engineering is controlling the parametric variability as its ignorance may induce non-robust designs. In this work, we are interested in the design of mechatronics system. The aim of this paper is to specify the allowable parametric tolerances on the system parameters using the variational approach. This...

The main objective of this paper is the integration of safety analysis in a SysML-based systems engineering approach in order to make it more effective and efficient. It helps to ensure the consistency between safety analyses and system design and then to avoid late errors and to reduce system development time. To achieve this purpose, we tackled t...

A mechatronic system results form the integration of several components from different domains. The system’s behavior is sensitive to the values of its parameters and variables. Be it small or large, a variation in these values can significantly influence the overall functioning of the system. To provide a high quality product, the fluctuations bet...

The introduction of new technologies to build ‘More Electric Aircraft’ induces new challenges for both the design and safety analysis of new aircraft. A model-based approach is needed for both design and validation processes in order to manage the complexity and validate the conformance to safety requirements. In this paper, a SysML-based approach...

Since Cyber-Physical Systems (CPS) may exhibit different structures and emergent behaviours during different operational phases, while also being safety critical, it is useful to perform systematic safety analyses tightly relying on the functional and components topologies of such systems. Our proposal is to perform FMEA and FTA analyses as soon as...

Modern engineering systems are getting complex and integrate multi-physical objects. The Model-Based System Engineering (MBSE) seems to be the best way to manage complex system design and the Systems Modeling Language (SysML) may be considered one of the computer languages to perform the designing of a complex system. MBSE also seems to be a valid...

Redundancy is widely used in safety-critical systems to improve their reliability. This paper proposes a framework to model different kinds of redundancy in model-based systems engineering process. A SysML extension which allows integrating redundancy-relevant properties in the system model in order to better represent system architecture is introd...

Nowadays man-made systems are getting more complex including new technologies and components from different domains. In addition, they are used in many safety critical missions. This induces new challenges in the design of such systems as new methods and tools are needed to manage the complexity while taking into account safety aspects. To face the...

The main objective of this paper is the integration of safety analysis in a SysML-based systems engineering approach in order to make it more effective and efficient. It helps to ensure the consistency between safety analyses and system design and then to avoid late errors and to reduce system development time. To achieve this purpose, we tackled t...

Mechatronic systems become widely used as onboard systems with the development of electric and hybrid vehicles, more-electric aircrafts, etc. to achieve critical missions such as the control of these systems. The synergistic aspect of mechatronic systems makes their design challenging to take into account all the interactions among components of di...

This paper presents the challenges related to the different points of view (System model, safety, 3D, topology, multiphysics, multi-agent, metrics) of MBSE design of mechatronic systems. To tackle this complexity and better take into account, simultaneously, these different points of view, we propose to define an ontology based on a mechatronic des...

Safety analysis of mechatronic systems is a time-consuming activity, because of the complexity of these systems that involve different fields of engineering. It is desirable to carry out safety assessment methods as soon as possible in the design process in order to reduce errors, cost and time to market of the system. Our paper addresses this prob...

Modern systems are getting more complex due to the integration of several interacting components with different technologies in order to offer more functionality to the final user. The increasing complexity in these multi-disciplinary systems, called mechatronic systems, requires new appropriate processes, tools and methodologies for their design,...

Mechatronic design aims to integrate the models developed during the mechatronic design process, in order to be able to optimize the overall mechatronic system performance. A lot of work has been done in the last few years by researchers and software developers to achieve this objective. However, the level of integration does not yet meet the purpo...

Mechatronic systems are characterized by the synergic interaction between their components from different technological domains. These interactions enable the system to achieve more functionalities than the sum of the functionalities of its components considered independently. Traditional design approaches are no longer adequate and there is a need...

In this paper, a methodology is proposed to integrate safety analysis within a systems engineering approach. This methodology is based on SysML models and aims at generating (semi-) automatically safety analysis artifacts, mainly FMEA and FTA, from system models. Preliminary functional and component FMEA are automatically generated from the functio...

The synergistic aspect of mechatronic systems leads to numerous linking paths and different types of flows exchanged between the system components. Connection components such as wires and tubes are used to transfer the exchanged flows among components. These interaction components, in addition to increasing system cost and weight, add a supplementa...

Model-based system engineering is an efficient approach to specifying, designing, simulating and validating complex systems. This approach allows errors to be detected as soon as possible in the design process, and thus reduces the overall cost of the product. Uniformity in a system engineering project, which is by definition multidisciplinary, is...

Mechatronic systems are complex systems involving knowledge from various disciplines such as computer science, mechanics, electronics and control. Model-based system engineering is an efficient approach to cope with the increasing system complexity. It covers specifying, designing, simulating and validating systems and is very useful for the design...

Introduction Compatibility relations between specification parameters Framework for minimum clearance determination Application Conclusion Bibliography

Model-based system engineering is an efficient approach to specifying, designing, simulating and validating mechatronic systems. This approach allows errors to be detected as soon as possible in the design process, and thus reduces the overall cost of the product. Uniformity in a complex mechatronic project, which is by definition multidisciplinary...

In this paper we present a model-based safety analysis approach that considers the entire mechatronic system as an assembly of various multi-physical components as well as the connection and the physical properties of different types of flow between them. We tightly integrate the safety aspects in a model-based system engineering process using SysM...

Due to manufacturing deviations, introducing clearance is needed to meet both assembly and mobility requirements of the mechanism and make it actually work. However, large clearance influences the mechanism’s accuracy. A wise clearance computation is then crucial. In the present paper, we propose to explicitly determine the minimum clearance values...

Aujourd'hui, de nombreuses méthodologies et outils de conception mécatronique existent. Mais leur approche est partielle au sens où ils ne permettent de passer continûment des spécifications au prototype virtuel. Dans cet article, la première partie descendante du cycle en V est intégrée. Pour faire cela, une méthodologie hybride, basée sur différe...

Current literature provides many studies on the mechatronic design process. However; they only focus on one level of the design V-cycle. This study deals with the entire downward side of the cycle in view to processing it globally. To achieve this, we propose a hybrid methodology based on several tools, languages and methodologies such as SADT, Sys...

Mechanical Modelica Libraries enable instances of geometrical objects and positioning. But in order to facilitate the design by taking into account the size and the positio objects, we need relative positioning parameters. In this paper, we propose challenge by adding in Modelica geometrical constraints and by implement

Modelica, langage de conception mécatronique, permet une modélisation structurelle et comportementale d’un système. Afin de faciliter la conception en prenant en compte l’encombrement et la situation spatiale des objets, nous proposons d’y ajouter une dimension géométrique dans un environnement adéquat.