Estimation of UH-60 blade aerodynamic loads and rotor impedance using generalized strain pattern/Kalman filter approachThe purpose of the study is to develop and verify a methodology capable of predicting the vibration levels and estimating the aerodynamic loads and rotor impedance of a rotorcraft blade. Simulated flight test data is generated, blade airloads and elastic hub motions are estimated from the simulated data through the use of the Kalman filter/smoother, simulation upgrading and parameter identification are performed, and the ability to identify rotor impedance from a simulation by isolating the rotor model and providing a prescribed motion for the hub as rotor excitation is demonstrated. It is pointed out that the statistical estimation procedure utilized in the proposed methodology minimizes the impact of sensor noise, truncation error, and instrumentation bias on the results.
Document ID
19910033023
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bruhis, Ofer (Advanced Rotorcraft Technology, Inc. Mountain View, CA, United States)
Duval, Ronald W. (Advanced Rotorcraft Technology, Inc. Mountain View, CA, United States)
Idan, Moshe (Stanford University CA, United States)