Instrumentation Considerations for the Extraction of Aerodynamic Coefficients from Free Flight Data.
Abstract
An error analysis method developed from weighted nonlinear least squares estimation techniques is applied to the extraction of aerodynamic coefficients from free flight data. The error analysis method developed may be used to assess the effects of instrumentation errors on the estimates of the extracted aerodynamic coefficients. The weighting matrix utilized is the inverse of the measurement error covariance matrix. The matrix of sensitivity coefficients used in the estimation process is shown to be functionally dependent upon the quantities measured. A method is developed whereby a single set of parametric differential equations may be used in determining the sensitivity matrix, regardless of the instrumentation arrangement. Six degrees of freedom equations of motion, the theory of simple motion measuring devices, and some aspects of least squares estimation are reviewed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0776820
Entities
People
- Gerald Solomon