A new method for simulating atmospheric turbulence for rotorcraft applicationsSimulation of atmospheric turbulence as seen by a rotating blade element involves treatment of cyclostationary processes. Conventional filtering techniques do not lend themselves well to the generation of such turbulence sample functions as are required in rotorcraft flight dynamics simulation codes. A method to generate sample functions containing second-order statistics of mean and covariance is presented. Compared to ensemble averaging involving excessive computer time, the novelty is to exploit cycloergodicity and thereby, replace ensemble averaging by averaging over a single-path sample function of long duration. The method is validated by comparing its covariance results with the analytical and ensemble-averaged results for a widely used one-dimensional turbulence approximation.
Document ID
19920031744
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Prasad, J. V. R. (Georgia Inst. of Tech. Atlanta, GA, United States)
Schrage, D. P. (Georgia Institute of Technology Atlanta, United States)
Gaonkar, G. H. (Florida Atlantic University Boca Raton, United States)
Riaz, J. (Georgia Inst. of Tech. Atlanta, GA, United States)