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The application of LQR synthesis techniques to the turboshaft engine control problemA power turbine governor was designed for a recent-technology turboshaft engine coupled to a modern, articulated rotor system using Linear Quadratic Regulator (LQR) and Kalman Filter (KF) techniques. A linear, state-space model of the engine and rotor system was derived for six engine power settings from flight idle to maximum continuous. An integrator was appended to the fuel flow input to reduce the steady-state governor error to zero. Feedback gains were calculated for the system states at each power setting using the LQR technique. The main rotor tip speed state is not measurable, so a Kalman Filter of the rotor was used to estimate this state. The crossover of the system was increased to 10 rad/s compared to 2 rad/sec for a current governor. Initial computer simulations with a nonlinear engine model indicate a significant decrease in power turbine speed variation with the LQR governor compared to a conventional governor.
Document ID
19840061398
Document Type
Conference Paper
Authors
Pfeil, W. H. (General Electric Co. Lynn, MA, United States)
De Los Reyes, G. (General Electric Co., Aircraft Engine Business Group, Lynn MA, United States)
Bobula, G. A. (U.S. Army, Propulsion Laboratory, Cleveland OH, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1984
Subject Category
AIRCRAFT PROPULSION AND POWER
Report/Patent Number
AIAA PAPER 84-1455
Funding Number(s)
CONTRACT_GRANT: NAS3-22763
Distribution Limits
Public
Copyright
Other