A digital turbulence model for the NLR moving-base flightsimulator. Part I

Title

A digital turbulence model for the NLR moving-base flightsimulator. Part I

 Author

Jansen, C.J.

Institution

National Aerospace Laboratory NLR

 Date

1977-08-29

 Abstract

The turbulence signals as used until now at NLR were generated by linearly filtering Gaussian white noise. The filter was shaped to output the Dryden power spectrum. A major complaint of pilots about this model was that the turbulence was to continuous and that the intermittent property of real turbulence was lacking. At RAE-Bedford a mathematical model for the generation of turbulence signals with controllable intermittency has been developed. A Fortran program of this gust simulation requires about 1 K memory and 6 msec computing time (on the PDP-II/U5), so a real-time application is possible. The RAE-Bedford program has been modified to enable flights with continuously variable airspeed. Moreover an improved height-dependency and asymmetric turbulence (u and a ) generating roll and yaw-moments ûga and ­aga is added. This modified program costs about 9 msec on the PDP-II/U5.

 To reference this document use:

http://resolver.tudelft.nl/uuid:dc033567-a531-4ec2-8cbf-06b5536f5f21

 Publisher

Nationaal Lucht- en Ruimtevaartlaboratorium

 Access restriction

Campus only

 Source

NLR Memorandum VS-77-024 U

 Part of collection

Aerospace Engineering Reports

 Document type

report

 Rights

(c)1977 National Aerospace Laboratory NLR
Files
PDF VS-77-024.pdf 26.43 MB
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