using linear interpolation to find coefficients
10 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi, i want to create a function that interpolates linearly to give me the coefficients. As an example, the function must take in AerodynamicData.Cm.BodyFlap (see below) and must use VehicleState to find the interpolated value of CmBodyFlap, which is the contribution that the body flap makes towards the aerodynamic coefficient named, Cm.
AerodynamicData.Cm.BodyFlap =
struct with fields:
deBF: [-11.7000 -5 0 5 10 16.3000 22.5000]
alpha: [-10 -5 0 5 10 15 20 25 30 35 40 45 50]
CmBodyFlap: [7×13 double]
VehicleState =
struct with fields:
alpha: 40
Mach: 5
deBF: 6
deSB: 0
deA: 0
Please help.
0 Kommentare
Antworten (2)
Sulaymon Eshkabilov
am 28 Mai 2020
Hi,
use polyfit(); e.g.
x = alpha; y = deBF; % then
Coeff= polyfit(x, y, N); % N=1 linear fit, N=2 second order polynomial fit, N=3 cubic polynomial, etc.
1 Kommentar
David Hill
am 28 Mai 2020
Make sure your matrix agrees with the meshgrid generated or change it to match.
[d,a]=meshgrid(AerodynamicData.Cm.BodyFlap.deBF,AerodynamicData.Cm.BodyFlap.alpha);
CmBodyFlap_interp=interp2(d,a,AerodynamicData.Cm.BodyFlap.CmBodyFlap,VehicleState.deBF,VehicleState.alpha);
0 Kommentare
Siehe auch
Kategorien
Mehr zu Interpolation finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!