hello,
i attached in the figure, the formula of the control law of the model free sliding mode control that i'll be using, when running my control algorithm in simulink, it gives me an algebraic loop error and this is very obvious cz 2 previous control input are demanded for the calculation of the current control input.. the question is, what do you suggest to solve such problem ? how the algorithm can know the values of the previous input at time t=0 ? should i define initial values or .. ?
Note: the picture is taken from "Raul Mittmann Reis" thesis.
you can use two "delay" blocks (for one or two path from the controller output to generate the control signal) with initial conditions for the previous control inputs
In addition, if you use simulink, you can use the memory block instead of the unit delay. It performs the same thing
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