Decentralized piecewise linear modeling of a turboshaft engine driving a variable pitch propeller

In this paper, we develop a nonlinear performance based model for a twin spool turboshaft engine which drives a variable pitch propeller. We also develop a piecewise linear representation of the model, which can be used for control of the turboshaft engine for large throttle commands (i.e. for the entire ight envelope). Finally we develop a decentralized piecewise representation of the model suitable for distributed and decentralized engine control. Simulation results for decentralized piecewise linear control of JetCat SPT5 turboshaft engine are presented. Fuel ow is the control input for the engine core subsystem, and prop pitch angle is the control input for the engine fan/prop subsystem.

[1]  James M. Hurt,et al.  New difference equation technique for solving nonlinear differential equations , 1964, AFIPS '64 (Spring).

[2]  Henry Cohen,et al.  Gas turbine theory , 1973 .

[3]  Jack L. Kerrebrock,et al.  Aircraft Engines and Gas Turbines , 1977 .

[4]  K. Mathioudakis,et al.  Adaptive modeling of jet engine performance with application to condition monitoring , 1994 .

[5]  Harold Brown,et al.  Control of jet engines , 1999 .

[6]  V. Sundararajan,et al.  Survey of Advancements in Jet-Engine Thermodynamic Simulation , 2000 .

[7]  G. G. Kulikov,et al.  Dynamic Modelling of Gas Turbines , 2004 .

[8]  Al Behbahani,et al.  The AFRL ICF Generic Gas Turbine Engine Model , 2005 .

[9]  A Generic Approach for Gas Turbine Adaptive Modeling , 2006 .

[10]  Michael Lichtsinder,et al.  Jet Engine Model for Control and Real-Time Simulations , 2006 .

[11]  Peter Lamm,et al.  Transient Analysis of an Aircraft/Propulsion System with Hardware-in-the-Loop Power Extraction , 2007 .

[12]  Michael Boyd,et al.  Transient Turbine Engine Modeling with Hardware-in-the-Loop Power Extraction (PREPRINT) , 2008 .

[13]  Link C Jaw,et al.  Aircraft Engine Controls: Design, System Analysis, and Health Monitoring , 2009 .

[14]  Ryan D. May,et al.  Control Design for a Generic Commercial Aircraft Engine , 2010 .

[15]  Alireza Behbahani,et al.  Decentralized Adaptive Control of a Turbofan System with Partial Communication , 2010 .

[16]  G. Tao,et al.  Adaptive control of piecewise linear systems: The output tracking case , 2010, Proceedings of the 2011 American Control Conference.