  This paper considers the on-line implementation of the modulating function
method, for parameter and state estimation, for the model of an air-handling
unit, the central element of HVAC systems. After recalling the few elements of
the method, more attention is paid on issues related to its on-line
implementation, issues for which we use two different techniques. Experimental
results are obtained after implementation of the algorithms on a heat flow
experiment, and they are compared with conventional techniques (conventional
tools from Matlab for parameter estimation, and a simple Luenberger observer
for state estimation) for their validation.
