Code covered by the BSD License  

Highlights from
Safety Critical Control Elements Examples

image thumbnail

Safety Critical Control Elements Examples

by

 

The files contained have the examples for safety critical control elements.

FirstOrderFilterTest.m
% Safety Critical Control Design.
% Control element Simulation and testing Examples.
% Based on requirements available at
% http://www.mathworks.in/matlabcentral/fileexchange/39047-testing-of-safet
% y-critical-control-systems
%
% Copyright Chethan CU - chethan.cu@gmail.com 
% Jan 2013

clear all 
DT = 0.02;
Tmax = 5;
t=0:DT:Tmax;
% Define Inputs here -----------------------------------------------

ns=[0 10 ];
ds=[1 10];
[Nz,Dz]=c2dm(ns,ds,DT,'tustin');

input = ones(length(t),1)*5+5;
input(1:10)=5;
init = zeros(length(t),1);
init(1:2)=1;

out = input(1);
pro=input(1);
pri=input(1);
output=[]; 
% Start of Algorithm -----------------------------------------------
for i = 1:length(t)
    
    if init(i) > 0
        
        out = input(i);
        pro=out;
        pri=input(i);
    else
        out=Nz(1)*input(i)+Nz(2)*pri-Dz(2)*pro;
        pro=out;
        pri=input(i);
    end
    output=[output;out];
end
% End of Algorithm -----------------------------------------------

% simulate the simulink model --------------------------------------
sim('FirstOrderFilter');
% plot results -----------------------------------------------------
subplot(211)
plot(t,input,t,output,t,o);
legend('Input','Code','Simulink')
title('Input Vs. Outputs')
subplot(212)
plot(t,output-o);
title('error=CodeOutput - SimulinkOutput ')
shg;

Contact us