CODEWITHSUNDEEP
simulink
user8474858
user8474858

Reputation: 35

if statement block in Simulink accumulates last true value

If statement in Simulink is not like in a programming language, it accumulates last true value untill it occurs again.

As it can be seen here, when random value is lower than 0.5 (if condition) output dosn't give zero as one normally expects from if statement.

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What is the proper way to use an if? (Where preferably I don't want to put saturation and matlab function)

Upvotes: 0

Views: 1753

Answers (3)

Apurva
Apurva

Reputation: 21

Change out blocks property in If action subsystem to 'reset', it looks like it is 'held' in your current implementation

Upvotes: 1

Phil Goddard
Phil Goddard

Reputation: 10772

The Out block within the If Action subsystem has a property to either hold or reset its output when disabled. The default is to hold; you want it to reset. You'll also need to specify 0 as the initial condition, which is what it'll reset to.

Upvotes: 2

user8474858
user8474858

Reputation: 35

So far what I could do this to use an elementary matlab function;

function y = fcn(u)

    if u>0
        y = u;
    else
        y = 0;
    end
end

but I wondered it would be a proper way of using if block.

Upvotes: 1

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