The proposed methodology streamlines the description and comprehension of mechatronic systems, employing formalism, concepts, and representation tools to facilitate in-depth exploration during the design phase.
Our overarching objective is to establish a methodological framework for functional analysis and mechatronic system supervision while adhering to established methods and utilizing appropriate tools.
Figure 4 delineates the three core phases around which the development of our model is organized: analysis of the operational architecture of the mechatronics system, functional analysis of the mechatronics system, and supervision of the mechatronics system.
A. Phase 1: Analysis of the operational architecture of the mechatronics system
In this phase, we delve into various methods for functionally analysing mechatronic systems. We introduce the Safe-SADT model, an extension of SADT, which encompasses safety operation parameters.
The initial step involves the identification of the system, its functions, and the materials in use. Subsequently, we define the operational architecture by projecting the functional architecture onto the hardware architecture. Finally, we proceed to develop the Safe-SADT model.
For complex Safe-SADT blocks, we employ a decomposition process akin to that of SADT. Subsequently, we utilize the Bottom-Up approach to aggregate elementary functions that emerge from the prior decomposition.
B. Phase 2: Functional Analysis of the mechatronics System
The second phase of our methodology entails the analysis and functional modeling of the system using the GRAFCET graphic tool. The structured organization of this method facilitates mastery of the intricate process. Fundamental concepts underlying discrete system modeling, such as steps, actions, transitions, and associated conditions, remain lucid and straightforward.
We commence by delineating the system's perspective in GRAFCET to establish objectives and viewpoints essential for constructing the model. Subsequently, we formulate the operational part of GRAFCET to elucidate the system's operation and divide it into discrete stages. Finally, we define the control aspect of GRAFCET, which furnishes a more granular view of the required automation.
C. Phase 3: Supervision of the mechatronics system
Following the completion of the two preceding analysis phases, the third phase centers on the implementation of a supervision tool and Human-Machine Interfaces (HMIs) for monitoring the mechatronic installation. Supervision serves as the linchpin for monitoring and controlling the system's operation within the realm of normalcy, even when faced with external disturbances.
WinCC, a widely embraced SCADA (Supervisory Control and Data Acquisition) system and HMI (Human-Machine Interface) system developed by Siemens, stands as a robust and extensively employed solution for supervision, especially in high-risk operational environments. It serves as a benchmark tool for operators and enables direct interaction with control systems via intuitive graphical interfaces.