Virtual development and validation methods are becoming standard practices on many industrial fields to speed up the development and validation process, reducing cost and time to market. In the automotive industry, during the last decade, simulation platforms have a central role on the development of vehicles and their systems. The development of mechatronic braking systems takes advantage from these virtual methods along the development and validation process, leveraging on Model In the loop (MIL), Software In the Loop (SIL), Hardware In the Loop (HIL) and Driver In the loop (DIL) platforms. On these virtual environments, the vehicle and system models shall have different properties and features to meet the needs of the development and validation tasks. This thesis is developed in collaboration with Brembo S.p.A, worldwide leader in the braking systems technology, and its scope is twofold. The first part of the work consists in the development and validation of a real-time vehicle model in Simulink, to be integrated in software development and validation platforms (MIL/SIL). To understand performances and limitations, a comparative study and integration with already available commercial vehicle dynamics tools is needed. The integration between the two simulation models shall be done developing dedicated interface tools. The scope of the second part of the thesis consists in analysing the improvements in accuracy when introducing a friction maps model able to estimate a variable pad-disc friction coefficient for the braking system, focusing the attention on simulations in a MIL environment. The variability of the friction coefficient is analysed in some particularly demanding manoeuvres from a thermal point of view, when the above cited friction coefficient is introduced both at the foundation braking level, and at the software level.
Lo sviluppo e la validazione di modelli virtuali è sempre più una pratica comune nelle aziende, per velocizzare lo sviluppo e la validazione riducendo tempi e costi. Nell’industria dell’automotive, e in particolare nell’ultimo decennio, le piattaforme di simulazione hanno un ruolo cruciale nello sviluppo del veicolo e dei suoi sistemi. Lo sviluppo di un impianto frenante meccatronico trae vantaggio da questi metodi virtuali nel corso del suo sviluppo, sfruttando piattaforme di simulazione Model In the Loop (MIL), Software In the Loop (SIL), Hardware In the Loop (HIL) e Driver In the loop (DIL). In questi ambienti virtuali, i modelli di veicolo e dei suoi sistemi necessitano di proprietà e caratteristiche diverse per soddisfare le richieste di sviluppo e validazione. La tesi è sviluppata in collaborazione con Brembo S.p.A, leader mondiale nella tecnologia degli impianti frenanti, e il suo scopo è duplice. La prima parte dell’elaborato consiste nello sviluppo e validazione di un modello real-time di veicolo in ambiente Simulink, per essere integrato nello sviluppo software e validazione di piattaforme virtuali (MIL/SIL). Per comprendere le performance e i limiti del modello sviluppato, il confronto e la validazione con software commerciali per la dinamica del veicolo risulta fondamentale. L’integrazione tra i due modelli di simulazione richiede lo sviluppo di apposite interfacce. Lo scopo della seconda parte dell’elaborato consiste nell’analizzare e quantificare i miglioramenti in accuratezza derivanti dall’introduzione di modelli di friction maps per la stima di un coefficiente di attrito variabile tra pastiglia e disco di un impianto frenante, con particolare attenzione alle simulazioni MIL. La variabilità del coefficiente di attrito è analizzata con riferimento ad alcune manovre particolarmente richiedenti e tali da causare incrementi termici; l’analisi si concentra sull’ introduzione del coefficiente di attrito sia a livello foundation, che all’interno del software.
Development and validation of a real-time vehicle model to be integrated in MIL simulations: analysis on the variability of the pad-disc friction coefficient of a mechatronic braking system
Perlini, Matteo
2022/2023
Abstract
Virtual development and validation methods are becoming standard practices on many industrial fields to speed up the development and validation process, reducing cost and time to market. In the automotive industry, during the last decade, simulation platforms have a central role on the development of vehicles and their systems. The development of mechatronic braking systems takes advantage from these virtual methods along the development and validation process, leveraging on Model In the loop (MIL), Software In the Loop (SIL), Hardware In the Loop (HIL) and Driver In the loop (DIL) platforms. On these virtual environments, the vehicle and system models shall have different properties and features to meet the needs of the development and validation tasks. This thesis is developed in collaboration with Brembo S.p.A, worldwide leader in the braking systems technology, and its scope is twofold. The first part of the work consists in the development and validation of a real-time vehicle model in Simulink, to be integrated in software development and validation platforms (MIL/SIL). To understand performances and limitations, a comparative study and integration with already available commercial vehicle dynamics tools is needed. The integration between the two simulation models shall be done developing dedicated interface tools. The scope of the second part of the thesis consists in analysing the improvements in accuracy when introducing a friction maps model able to estimate a variable pad-disc friction coefficient for the braking system, focusing the attention on simulations in a MIL environment. The variability of the friction coefficient is analysed in some particularly demanding manoeuvres from a thermal point of view, when the above cited friction coefficient is introduced both at the foundation braking level, and at the software level.File | Dimensione | Formato | |
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2023_10_Perlini_01_Tesi.pdf
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Descrizione: Testo tesi
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2023_10_Perlini_02_Executive_Summary.pdf
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Descrizione: Executive summary
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https://hdl.handle.net/10589/209925