Two applications of thermal network correction techniques

Thermal model corrections present many difficulties, particularly with complex systems, because, for instance, of the interaction of the parameter values on the temperatures, and also because of the presence of noise in the measurements necessary for the correction. The application of such a technique (Kalman filtering) both to steady state and transient problems is presented here. The nodal analysis, which offers a rather efficient frame for a development of general, thermal network correction software package is used for this. The first example concerns the identification of heat exchange coefficient on a fin in steady state, and teh second leads to the determination, in the transient case, of the conductivity in a combined heat transfer (conduction and radiation with absorption).