Does anyone have any input into this MATLAB code for max vehicle speed? How would you incorporate CVT and gearbox ratio into this equation. I found this on a teams report, I do not take ownership of this code.
% This Program will allow for a maximum vehicle velocity to be calculated
% from a number of given inputs
% Maximum Power at the rear wheels (assuming 85% efficient driveline)
Pmax = 550*.84*(8.9); % (ft*lb/s)
% Frontal Car Area
A = 2016/144; % sq ft
% Drag Coefficient
Cd = 1.08;
% Density of Air at standard conditions
rho = 2.38 * (10^(-3)); %slugs/(cubic foot)
% Vehicle weight
W = 420; %lbf
% Coefficient of Rolling Resistance
Crr = .068;
% Maximum Vehicle Velocity (Just an initialization)
Vmax = 0; % ft/s
roots = 0;
while (1)
RHS = (1/2)*(Cd)*(A)*(rho)*(Vmax^3) + (Crr*W)*Vmax;
eapprox = abs((Pmax - RHS)/Pmax)*100;
if eapprox < .1;
fprintf('The maximum attainable vehicle velocity is approximately\n')
fprintf(' %.4f mph \n',Vmax*(3600/5280))
break
else
Vmax = Vmax + .01;
end
end
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