Optimal power spectrum in the multisine experiment design
Daniel Agudelo Norena , Piotr Lichota
AbstractThe objective of the project was to determine if the accuracy of the estimated data for lateral motion could be increased by the use a priori model information during the system identification multisine maneuver design process. For this purpose, a linear aircraft model was used which contains a-priori information in terms of aerodynamic derivatives. A-priori Information allowed us to obtain a non-uniform power spectrum used in the design of the input signal that excited the ailerons and rudder. Three cases were analyzed for comparison. The first case was obtained with a uniform power spectrum distribution without a-priori knowledge implementation. The second case used the a-priori model state matrix information to determine dominant frequencies of the system and assigned more power to them. The third case a non-uniform optimized power spectrum was determined by the use of a genetic algorithm. The Relative Peak Factor was used as the decision variable to increase the efficiency of the design. A-priori knowledge was introducing by using Marchand methodology. The obtained maneuvers sets were used to excite the aircraft model. The system response was recorded and used to perform a parameter estimation for each case. The results were compared in terms of the accuracy.
|Journal series||Actas de Ingenieria, ISSN 2463-0128, (0 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Input design; aircraft system identification; simultaneous deflections; flight dynamics|
|Score|| = 0.0, 05-09-2019, ArticleFromJournal|
= 5.0, 05-09-2019, ArticleFromJournal
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.