Analytic simulation of higher harmonic control using a new aeroelastic modelThis paper describes a higher harmonic control (HHC) study of a four bladed hingeless rotor using a coupled flap-lag-torsional aeroelastic stability and response analysis which incorporates finite-state, time-domain aerodynamics. The rotor trim condition is determined using a coupled trim-aeroelastic analysis. Deterministic and cautious controllers based on local and global HHC models are implemented with different combinations of input parameters identified using a Kalman filter. The effects of unsteady versus quasisteady aerodynamic modeling on HHC simulations are investigated, including the effectiveness of the local and global HHC models and the advantages of different identification schemes.
Document ID
19890043427
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Friedmann, P. P. (California, University Los Angeles, United States)
Robinson, L. H. (California Univ. Los Angeles, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
AIAA PAPER 89-1321
Meeting Information
Meeting: AIAA, ASME, ASCE, AHS, and ASC, Structures, Structural Dynamics and Materials Conference