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原文传递 Verifying Implementation of the Dryden Turbulence Model and MIL-F-8785 Gust Gradient.

题名：	Verifying Implementation of the Dryden Turbulence Model and MIL-F-8785 Gust Gradient.
作者：	Madden, M. M.
关键词：	Turbulence, Power spectra, Turbulence models, Gusts, Gradients, Pilot training, Cockpit simulators, Wind effects, Time series analysis, Analysis of variance, Linear filters, Cues
摘要：	Turbulence modeling in human-in-the-loop simulation is important to assessing aircraft handling qualities and pilot performance and to provide additional realism for pilot training. In the simulation community, the Dryden turbulence spectra is a popular choice for modeling the linear turbulent gusts because its rational form is efficiently reproduced by passing white noise through linear filters. The MIL-F-8785 gust gradients similarly use additional linear filters to model the gradient of the turbulent gust over the wing, and it represents the gust gradients as perturbations to the air-relative rotational rates. The Cockpit Motion Facility at NASA Langley Research Center (LaRC) models continuous random turbulence using the Dryden one-dimensional spectra and MIL-F-8785 gust gradient. The facility recently reviewed and updated its verification of these models as part of an initiative to improve motion cueing under turbulence. This exercise introduced improved methods for verifying the turbulence models and led to rediscovery of model assumptions that informed improvements to implementation.
报告类型：	科技报告