... prevent costly component damage but will also enhance the operability margin of engines. A successful attempt has been made to control flashback in an atmospheric LP combustor, burning natural gas-air mixtures, via the application of dielectric barrier discharge (DBD). A low-power DBD actuator...

...Fabrice Giuliani; Andreas Lang; Klaus Johannes Gradl; Peter Siebenhofer; Johannes Fritzer A specific actuator able to modulate the air feed of a gas a burner at a given frequency and amplitude is presented. The Combustion Department at the Institute for Thermal Turbomachinery and Machine Dynamics...

... by implementing both the extended Kalman filter and the unscented Kalman filter as detection filters. Simulation results presented demonstrate the effectiveness of our proposed multiple model FDI algorithm for both structural and actuator faults in the jet engine. While the comparison between a single UKF...

...Michael Benz; Markus Hehn; Christopher H. Onder; Lino Guzzella This paper proposes a novel optimization method that allows a reduction in the pollutant emission of diesel engines during transient operation. The key idea is to synthesize optimal actuator commands using reliable models of the engine...

...Olof Hannius; Dan Ring; Johan Karlsson This paper presents a method for deriving requirements for the efficiency of diagnostic functions in distributed electronic turbofan engine control systems. Distributed engine control systems consist of sensor, actuator, and control unit nodes that exchange...

...Tongxun Yi; Ephraim J. Gutmark The present paper performs complementary experimental and theoretical investigations of a pump-style, high-frequency, magnetostrictive fuel actuator, which achieves fuel modulations by periodically “pushing” fuel out of a piston-cylinder unit instead of by modulating...

.... When the propulsion system experiences a fault, only one Kalman filter with the correct hypothesis is able to maintain the nominal estimation performance. Based on this knowledge, the isolation of faults is achieved. Since the propulsion system may experience component and actuator faults as well...

... the effective amplitude and phase of the fuel modulation at the fuel outlet are as critical as the proper injection position. In typical cases the modulation of the fuel at the location of the actuator can be fundamentally different in amplitude and phase from the modulation of the fuel flow at the fuel outlet...

... with or account for actuator phase drift/error. Current address: Departmnet of Electrical and Computer Engineering, University of California, Santa Barbara, CA. Current address: Institute for Defense Analyses, Alexandria, VA. Corresponding author. Current address: Pratt & Whitney, 411 Main...

... for these types of effects and other system uncertainties by utilizing multiple sets of current pairs in opposing actuators, in conjunction with a calculation algorithm, to accurately determine the force applied by the AMB. This new multipoint methodology allows for the determination of bearing forces from...

... temporal modulation of the fuel flow rate but without concomitant changes in spray dynamics. This is achieved using an atomization strategy which is insensitive to both fuel flow rate and combustor acoustics (an over-pressured spill-return nozzle) coupled with an actuator with flat frequency response...

... stiffness coefficients for magnetic actuators can have a significant impact on shaft rotordynamics. These coefficients are typically computed as the sensitivity of a magnetic force expression derived from a lumped parameter reluctance network. However, as the complexity of magnetic actuator designs...

... Interaction Noise Using a Single Actuator Per Blade,” AIAA Paper 96-1691. Sawyer, S., and Fleeter, S., 1997, “Active Control of Discrete-Frequency Noise Generated by Rotor-Stator Interactions,” AIAA Paper 97-1689. Tyler , J. M. , and Sofrin , T. G. , 1962 , “ Axial Flow Compressor Noise...