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fuselageExternalInit.m
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fuselageExternalInit.m
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function external = fuselageExternalInit( n_segments )
%fuselageExternalInit define and initialize external struct for fuselage
% struct
% The external struct contains information about external states such as
% wind velocity and atmospheric parameters.
%
% Inputs:
% n_segments number of segments for the discretized aerodynamics
% model (scalar)
%
% Outputs:
% external external struct as defined by this function
%
% Disclaimer:
% SPDX-License-Identifier: GPL-3.0-only
%
% Copyright (C) 2020-2022 Yannic Beyer
% Copyright (C) 2022 TU Braunschweig, Institute of Flight Guidance
% *************************************************************************
% wind velocity at each segment border point in body frame, in m/s
external.V_Wb = zeros( 3, n_segments+1 );
% wind acceleration at each segment border point in body frame, in m/s^2
external.V_Wb_dt = zeros( 3, n_segments+1 );
% atmospheric parameters at the current altitude (see isAtmosphere)
external.atmosphere = isAtmosphere(0);
end