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Cessna Citation X simulation turbofan modelling: identification and identified model validation using simulated flight tests

Published online by Cambridge University Press:  14 March 2019

Ruxandra Mihaela Botez ,
Paul-Alexandre Bardela  and
Thomas Bournisien
Ruxandra Mihaela Botez*
Affiliation:
ÉTS, Systems Department, Laboratory of Applied Research in Active Controls, Avionics and AeroServoElasticity (LARCASE), Montreal, Québec, Canada
Paul-Alexandre Bardela
Affiliation:
ÉTS, Systems Department, Laboratory of Applied Research in Active Controls, Avionics and AeroServoElasticity (LARCASE), Montreal, Québec, Canada
Thomas Bournisien
Affiliation:
ÉTS, Systems Department, Laboratory of Applied Research in Active Controls, Avionics and AeroServoElasticity (LARCASE), Montreal, Québec, Canada
*
[email protected]
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Abstract

The aviation industry relies on accurate models. These models are used to predict an aircraft system’s outputs, and thus allow an understanding of the parameters involved, which could lead to system improvements. This study focuses on the engine modelling of an aircraft, and on its experimental validation using the Cessna Citation X Research Aircraft Simulator designed by CAE Inc., equipped with a level D Flight Dynamics toolbox. Level D is the highest rank attributed by the Federal Aviation Administration FAA certification authorities for flight dynamics. The proposed model aims to predict the thrust and the fuel consumption for various altitudes, Mach numbers and throttle lever angles (TLA). Different generic static models, which correspond to their steady state, from the literature, were used in this study; however, most of them were validated under restricted hypotheses. An optimisation algorithm was used in order to tune the static model parameters with the set of identification flight test data. Another set of data was then used in order to validate the identified model. Furthermore, a dynamic model corresponding to the transient operations was identified. TLA steps, impulses and ramp perturbations were performed in order to identify the system response, and to validate system dynamic model with other flight tests than the identification tests.

Keywords

TurbofanCessna Citation X Business AircraftFlight testsModel identification and validationResearch Aircraft Flight Simulator
Type
Research Article
Information
The Aeronautical Journal , Volume 123 , Issue 1262 , April 2019 , pp. 433 - 463
Copyright
© Royal Aeronautical Society 2019 

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References

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