Thermal Analysis for Systems Perturbed in the Linear Domain Method Development and Numerical Validation

2005-01-3056

07/11/2005

Event
International Conference On Environmental Systems
Authors Abstract
Content
Improvements on the thermal analysis for system perturbed by micro-thermal fluctuations are presented: the method applies to any kind of (small) perturbation, in particular to the random ones.
Opposite to time domain conventional transient analysis, this method answers the need for frequency domain thermal analysis dictated by the newest scientific missions, with tight temperature stability requirements (expressed in the frequency domain).
The small temperature fluctuations allow for assuming any thermal systems a linear one; hence linear system theory holds, and powerful tools to calculate key parameters like frequency response can be successfully employed.
MIMO (Multi-Input-Multi-Output) systems theory is applied, the inputs being perturbations to the thermal system (boundary temperatures oscillations and power sources ripple of any shape: pulse, step, periodic, random, …), while the outputs are the temperatures of the sensible parts.
Main advantage of the presented method is that, this way, there is no longer need to stimulate the system with micro-perturbations in transient analysis, thus avoiding:
  • potential numerical errors
  • dedicated simulations for every type of disturbance
  • long processing time.
Moreover, this allows to have a synthetic definition how the effects of disturbances are propagated through the model, suitable for a graphical representation of the way the perturbation is damped by the heat transfer differential equations within the thermal model.
Meta TagsDetails
DOI
https://doi.org/10.4271/2005-01-3056
Pages
15
Citation
Molina, M., Franzoso, A., and Giacomazzo, M., "Thermal Analysis for Systems Perturbed in the Linear Domain Method Development and Numerical Validation," SAE Technical Paper 2005-01-3056, 2005, https://doi.org/10.4271/2005-01-3056.
Additional Details
Publisher
Published
Jul 11, 2005
Product Code
2005-01-3056
Content Type
Technical Paper
Language
English