Rate limiter initialization problem

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Samuele Moscatelli
Samuele Moscatelli 2017-5-24
编辑： Samuele Moscatelli 2017-5-26
I'm a student of engineering and I have to use Simulink (Matlab 2017a)to create a model of an electrical motor; in order to create the speed reference, I used a lookup table and, after it, a rate limiter. My problem is that the rate limiter block doesn't work properly because it doesn't consider the initial condition: instead of starting from 0 (the set initial value) it starts directly from the first value that exit from the lookup table. I have checked with Matlab and the two values are exactly the same (while in the next changes of value the rate limiter works well and the difference from its input to its output is clearly visible). Can anyone tell me how to initialize this block, please?

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