Activity: Talk or presentation › Oral presentation
Description
The adjoint method is a very powerful tool for parameter identification or optimal control
in time domain. In most cases the results lead to some kind of best-fit solution, which means that high frequency
components with low amplitudes are not considered. However, in this contribution we present an approach for the
identification of parameters which influences the system at special frequencies or frequency ranges. The basic idea
is to compute the Fourier coefficients for the relevant oscillations. Then, the cost function is the difference of the
amplitudes from the simulation and a measured value e.g., from a test bench. The derivation and computation of
the gradient of the cost function with the adjoint method is presented and applied to a four-cylinder engine in order
to identify the parameters of a torsional vibration damper (TVD).