Hybrid state-space coupling of experimental models and parametric reduced order models for enhanced real-time simulations

Abstract

Virtual prototyping has emerged as a key enabler in modern engineering design, allowing extensive virtual testing during the early development phases and reducing reliance on costly and time-consuming physical prototypes. In the NVH field, virtual prototyping techniques are essential for accurately predicting vibro-acoustic behavior, which is critical to achieving optimal vehicle performance and passenger comfort. This paper presents an innovative hybrid state-space coupling framework that integrates parametric reduced order models with systems characterized experimentally. The proposed approach enables the real-time computation of target responses derived from blocked force time histories. By leveraging the advantages of state-space representation and parametric model order reduction technology, the framework offers several key benefits. It supports fast design optimization by eliminating the computational overhead of recomputing transfer functions, a task traditionally required during iterative simulation processes. Additionally, the flexible architecture of the framework enhances its adaptability to various interactive applications. A critical aspect of the workflow proposed is the system identification process, which should respect certain physical properties of the systems to be coupled. This adherence to physical constraints is essential to guarantee the stability of the coupled structure and achieving accurate simulation result. The virtual coupling is evaluated both in terms of frequency response functions and time-domain responses, demonstrating results that align with state-of-the-art approaches. Computation analyses show the advantage of the approach proposed over frequency-based techniques. The findings underscore the framework’s potential as a powerful tool for NVH analysts and design engineers, enabling faster and more reliable decision-making during early development stages.

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Identifiers

ORCID for Sjoerd Van Ophem: orcid.org/0000-0003-1050-7318

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