Projects / Programmes
Smart Systems and Structural Dynamics
| Code |
Science |
Field |
Subfield |
| 2.05.00 |
Engineering sciences and technologies |
Mechanics |
|
| Code |
Science |
Field |
| T210 |
Technological sciences |
Mechanical engineering, hydraulics, vacuum technology, vibration and acoustic engineering |
| Code |
Science |
Field |
| 2.03 |
Engineering and Technology |
Mechanical engineering |
smart systems, structural dynamics, damping, force measurement, pressure measurement
Researchers (19)
Organisations (1)
Abstract
Smart properties/functions can significantly increase the added value of the dynamical systems. As an example one can look at the well established products: glow plugs for diesel engines and vacuum suction unit for vacuum cleaners; these products are technologically mature and it is difficult to achieve higher added value. Significant increase in the added value can be achieved by adding of the intelligent secondary functions: glow plugs with the additional sensory functions (sensing pressure of the combustion process) can significantly increases the added value. The smart design of the structural dynamics in case of the suction unit can take the secondary function of damping vibration and noise reduction.
As pointed out with the motivation of the two industrial examples, the fundamental goals of this basic scientific research are:
• 1st Goal: Identification and modeling of spatially distributed structural damping in composite structures,
• 2nd Goal: Smart structures with the secondary/primary sensing function.
Within the 1st goal, we plan to build on our scientific expertise in the field of damping identification (continuous wavelet transform, especially) and to extend the expertise in the field of distributed spatial damping of composite structures. The spatial damping identification and modeling are today still not resolved and require further research and development. In most cases, the damping is modeled in the form of simplified models (mostly in the modal domain) which do not relate properly to the actual spatial distribution of damping parameters. In recent years the direct (and similar) damping methods applied for spatial damping identification; the initial research looks promising and in future we expect significant scientific advances in the field. We also expect significant advances in the field of modeling spatialy distributed damping.
Within the 2nd goal we plan to build on our experience in the field structural dynamics of small and light structures. We plan to extend this expertize towards the integrated sensing element for measuring the force and/or pressure.
We expect that the results of the project will significantly contribute to the development of science in the field of spatially distributed damping and in the field of structural dynamics of small and light structures with integrated sensing elements. New direct damping identification method and new modeling approach for spatially damping distribution are expected. With regards to the secondary sensory function we expect the project to result in significant contribution in: inertial influences, material degradation, uncertainty of function, damping influences.
The proposed research is planned to be joined by the research group of the Slovenia company with approx. 60% share of the European Glow Plugs. This company is also developing Glow Plugs with integrated pressure sensor and is clearly interested in the fundamental research on smart systems and structural dynamics (sensory function, especially). Besides the direct research results, the indirect in the form of increase structural dynamics competences of the project team members are expected. On short and also long term we expect that smart systems based on structural dynamics will help to increase the added value of the Slovenian companies.
Significance for science
The scientific project contributed to the development of science through 6 scientific articles published in A1 journals (A', A1/2): The scientific article presented in the Journal of sound and vibration (BRUMAT, M., SLAVIČ, J., BOLTEŽAR, M., 2016), a theoretical overview of various methods of spatial damping was compared; further, a new spatial damping model was presented; furthermore, one of the first comprehensive experimental studies on different spatial damping methods is presented. The contribution published in the Journal of sound and vibration (MIHALEC, M., JAVH, J. CIANETTI, F., MORETTI, M., ROSSI, G., SLAVIČ, J., BOLTEŽAR, M., 2017) presents one of the first experimental and theoretical studies on the ratio of the damping energy that is converted into heat. The article published in the International Journal of Mechanical Sciences (BRUMAT, M., SLAVIČ, J, BOLTEZAR, M .. 2016) deals with the scientific contribution of spatial damping from the point of view of the damping characteristics of the final dynamic system (product). The study clearly demonstrates the advantage of spatial damping and leads to the targeted use of damping elements. The article published in Mechanical Systems and Signal Processing (MIHALEC, M., SLAVIČ, J. BOLTEŽAR, M., 2016) extends the synchrosquezeed continuous wavelet transform for the identification the damping at noise signals. Contribution published in Mechanical Systems and Signal Processing (ROVŠČEK, D., SLAVIČ, J., BOLTEŽAR, M., 2014) contributes to the understanding of the structural dynamics of small and light structures by introducing structural modifications for the needs of modal normalization. The latest scientific paper was published in Mechanical Systems and Signal Processing (JAVH, J., SLAVIČ, J., BOLTEŽAR, M. 2018) and represents a scientific breakthrough in the use of conventional cameras for capturing spectral components of the vibrating structures. The basic principle relates the special illumination conditions with the idea of optical Fourier transform at each pixel of the still camera.
Significance for the country
In addition to the scientific impact, this project has an important socio-economic impact. The project included doctoral researchers who are now involved in the research and development activities of the relevant Slovenian export industry. This project significantly contributed to the developed of competences in the field of piezoelectric sensors. The partnering research institution helped to develop new products with sensory elements. Also as a result of this project, new opportunities in the field of smart systems and structural dynamics, have been identified in the Slovenian industry.
Most important scientific results
Annual report
2014,
2015,
final report
Most important socioeconomically and culturally relevant results
Annual report
2014,
2015,
final report
