The aim of the thesis is to analyze and describe the main control strategies of a semi-active suspension system in order to improve and balance comfort and road holding. After an initial presentation and description of the physical-mathematical model used, the behaviors of different types of passive and semi-active suspensions are analyzed, studied and compared using tools such as Matlab and Simulink. For this purpose, the system is subjected to an external and localized stress, consisting of a hypothetical deformation of the road surface, carrying out a temporal and frequency analysis to study the response of components such as the frame and tire. The results of this analysis are then compared and discussed, highlighting any advantages and critical points of each type of suspension, depending on how it is desiderd to balance comfort and road holding.
L'elaborato ha come obiettivo quello di analizzare e descrivere le principali strategie di controllo di un sistema di sospensioni semi-attive al fine di migliorare ed equilibrare comfort e tenuta di strada. Dopo una presentazione e descrizione iniziale del modello fisico-matematico utilizzato, vengono analizzati, studiati e confrontati i comportamenti di differenti tipi di sospensioni passive e semi-attive servendosi di strumenti quali Matlab e Simulink. A tale scopo si sottopone il sistema a una sollecitazione esterna e localizzata, consistente in un'ipotetica deformazione del manto stradale, effettuando un'analisi temporale e in frequenza per studiare la risposta di componenti quali telaio e pneumatico. I risultati di questa analisi vengono poi confrontati e discussi, evidenziando eventuali vantaggi e criticità di ogni tipo di sospensione, anche in funzione dell'equilibrio che si vuole ottenere tra comfort e tenuta di strada.
Analisi e descrizione delle principali strategie di controllo di un sistema di sospensioni semi-attive
BRAGAGNOLO, GIACOMO
2024/2025
Abstract
The aim of the thesis is to analyze and describe the main control strategies of a semi-active suspension system in order to improve and balance comfort and road holding. After an initial presentation and description of the physical-mathematical model used, the behaviors of different types of passive and semi-active suspensions are analyzed, studied and compared using tools such as Matlab and Simulink. For this purpose, the system is subjected to an external and localized stress, consisting of a hypothetical deformation of the road surface, carrying out a temporal and frequency analysis to study the response of components such as the frame and tire. The results of this analysis are then compared and discussed, highlighting any advantages and critical points of each type of suspension, depending on how it is desiderd to balance comfort and road holding.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/92180