New insights on SINTRACK, a real-time algorithm for aircraft structural-modes identification.

SINTRACK is a real-time signal-processing algorithm providing estimates of low damped sinusoids. Its good balance between accuracy and low CPU cost makes it an attractive tool for on-board applications. Some first theoretical analysis on its performances were performed and presented in EUSIPCO 98, along with heuristics for an optimal tuning of some algorithm parameters. Further studies were lately performed in order to fulfil industrial requirements. Domain of use with regard to signal-to-noise ratio and number of modes in the signal was evaluated. Normalization of the dependencies to the last two tuning-parameters was performed. Then optimisation of their tuning using neural networks was conducted. The result consists in an optimal universal solution valid for any single-mode signal. Many aeronautical applications requiring real-time estimates deal with such signals. Coding of the algorithm was performed in a very basic aeronautical language, used for embedded code production, authorizing only elementary functions.