Variable Selection and Indices Proposal for the Determination of an Aeronautic Valve Degradation
This work presents a method to select parameters and use them in an index to identify the degradation level of an aeronautic valve of the type PRSOV (Pressure Regulator and Shutoff Valve), a valve of the bleed air system of aircrafts. This index function is to be used as an input to the valve controller reconfiguration as the valve presents degradation while ages. The monitoring of degradation rates can provide information to modify the controller parameters in order to increase the valve useful life, to allow maintenance services planning or even to prevent the system performance being meaningfully impacted by the valve aging. The sorts of degradation considered were: friction increase, charging orifice obstruction and venting orifice obstruction. The study was made based on the valve mathematical model, in which was possible to vary those degradations levels and verify how each one influences the model response. The hysteresis graphic morphology was analyzed and also the sensibility and robustness after disturbances in the inlet air pressure with the system in closed loop, where the objective was to identify a monitoring that could be realized with the aircraft in air. The results allowed the identification of the most recommended parameters to monitor and the evaluation of the valve degradation through them.
How to Cite
Pneumatic Valves, PHM, aircraft, degradation
Chapra, S. C., & Canale, R. P. (2008). Métodos Numéricos para Engenharia (Quinta Edi.). São Paulo - SP: McGraw-Hill.
Daigle, M. J., & Goebel, K. (2011). A Model-Based Prognostics Approach Applied to Pneumatic Valves. International Journal of Prognostics and Health Management, 2, 1–16.
Gomes, J. P. P., Ferreira, B. C., Cabral, D., Galvão, R. K. H., & Yoneyama, T. (2010). Health Monitoring of a Pneumatic Valve Using a PIT Based Technique. Annual Conference of the Prognostics and Health Management Society, 1–6.
Moir, I., & Seabridge, A. (2008). Aircraft Systems: Mechanical, Electrical and Avionics Subsystems Integration (Third., Vol. 40). Wiley. doi:10.1002/1521- 3773(20010316)40:6<9823::AID- ANIE9823>3.3.CO;2-C
Moreira, R. de P., & Nascimento Júnior, C. L. (2012). Prognostics of aircraft bleed valves using a SVM classification algorithm. In IEEE Aerospace Conference Proceedings (Vol. 4400, pp. 1–9). doi:10.1109/AERO.2012.6187377
Ogata, K. (2000). Engenharia de Controle Moderno (Terceira e.). LTC - Livros Técnicos e Científicos Editora S.A.
Pecht, M. G. (2008). Prognostics and Health Management of Electronics. John Wiley & Sons, Inc.
Turcio, W. H. L. (2014). Projeto de um controlador quasi- LPV para um sistema pneumático aeronáutico. Instituto Tecnológico da Aeronáutica.
Vachtsevanos, G., Lewis, F. L., Roemer, M., Hess, A., & Wu, B. (2006). Intelligent Fault Diagnosis and Prognosis for Engineering Systems. John Wiley & Sons, Inc.
The Prognostic and Health Management Society advocates open-access to scientific data and uses a Creative Commons license for publishing and distributing any papers. A Creative Commons license does not relinquish the author’s copyright; rather it allows them to share some of their rights with any member of the public under certain conditions whilst enjoying full legal protection. By submitting an article to the International Conference of the Prognostics and Health Management Society, the authors agree to be bound by the associated terms and conditions including the following:
As the author, you retain the copyright to your Work. By submitting your Work, you are granting anybody the right to copy, distribute and transmit your Work and to adapt your Work with proper attribution under the terms of the Creative Commons Attribution 3.0 United States license. You assign rights to the Prognostics and Health Management Society to publish and disseminate your Work through electronic and print media if it is accepted for publication. A license note citing the Creative Commons Attribution 3.0 United States License as shown below needs to be placed in the footnote on the first page of the article.
First Author et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 United States License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.