Description of a Computer Program and Numerical Technique for Developing Linear Perturbation Models From Nonlinear Systems Simulations

摘要

A numerical technique has been developed at Langley Research Center which gen¬erates linear perturbation models from nonlinear aircraft vehicle simulations. The technique is very general and can be applied to simulations of any system that is described by nonlinear differential equations. The computer program used to gener¬ate these models is discussed with emphasis placed on generation of the Jacobian matrices, calculation of the coefficients needed for solving the perturbation model, and generation of the solution of the linear differential equations. Included in the paper is an example application of the technique to a nonlinear model of the NASA Terminal Configured Vehicle.