plot road load for a car in matlab

To plot road load for a car in MATLAB, you'll need to calculate the resistance forces acting on a car moving at a certain speed, as well as the power delivered by the engine to overcome these forces.

Here's an example code that demonstrates how to plot the total resistance forces acting on a car as a function of speed:

main.m
%define variables
m = 1000; %mass of the car in kg
g = 9.81; %acceleration due to gravity in m/s^2
Cd = 0.3; %drag coefficient
rho = 1.2; %density of air in kg/m^3
A = 2.5; %frontal area of the car in m^2
f = 0.01; %rolling resistance coefficient
v = 0:0.1:120; %speed range in km/h

%calculate resistance forces
F_drag = 0.5*Cd*rho*A*(v/3.6).^2; %drag force
F_rr = f*m*g; %rolling resistance force
F_grade = m*g*sin(2*pi/180); %grade resistance force (2-degree incline)

%plot the total resistance force vs. speed
figure
plot(v,F_drag+F_rr+F_grade)
xlabel('Speed (km/h)')
ylabel('Total Resistance Force (N)')
title('Road Load Profile')
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This code uses basic physics principles to calculate and plot the total resistance force acting on a car. The resistance forces include, but are not limited to, drag force, rolling resistance force, and grade resistance force. The plot shows how the total resistance force increases with speed, indicating the amount of power required by the engine to overcome these forces and maintain a certain speed.