How to control motor speed using matlab code?

Hi! I am wondering how I will be able to control motor speed using matlab code?

Answer 1

[Sabin]

Not sure I fully understand this question. To control the speed of the motor first we need to decide which algorithm we want to use. Do we want a continuous time simulation or discrete? We can then implement the algorithm in Simulink using dedicated blocks such as Integrator or PID. If you prefer to use MATLAB code, it is also possible. Below is a simple sample to code a PI controller. I hope this helps.

% PI Controller Parameters
Kp = 1;  % Proportional gain
Ki = 0.5;  % Integral gain

% System Parameters
desiredValue = 100;  % Desired speed value
initialValue = 0;  % Initial value of the speed
dt = 0.01;  % Time step
totalTime = 20;  % Total simulation time

% Initialize variables
time = 0:dt:totalTime;
error = zeros(size(time));
integral = zeros(size(time));
u = zeros(size(time));
y = initialValue;

% PI Controller Loop
for i = 2:numel(time)
    % Calculate error
    error(i) = desiredValue - y;
    
    % Calculate integral term
    integral(i) = integral(i-1) + error(i) * dt;
    
    % Calculate control output
    u(i) = Kp * error(i) + Ki * integral(i);
    
    % Update system u
    y = y + u(i) * dt;
end

% Plot results
figure;
plot(time, u, 'r', 'LineWidth', 1.5);
hold on;
plot(time, error, 'b', 'LineWidth', 1.5);
legend('u', 'Error');
xlabel('Time');
ylabel('Value');
title('PI Controller');
grid on;