Simulink Threshold with action

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Todd
Todd 2025-2-22
回答： Walter Roberson 2025-2-22
I would like to create a simulink model that basically takes an input, lets say 2.5, and check if this value is between 6.5 to 8.5. Once checked, if below this range, then it must add 1 to the initial input. If it is betwen this range, all it needs to do is display the output that falls between the 6.5 to 8.5 range. If possible, I would like for it to show how many iterations it took to get between range.

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回答（2 个）

Sam Chak
Sam Chak 2025-2-22
Ran in:
Naturally, I would expect that the input signal evolves over time and that the thermostat-like controller performs a switching action to maintain the signal within a specified band.
However, the way you described the requirement suggests a discrete event. Consequently, it is relatively straightforward to calculate the number of iterations required mentally.
numIteration = 0;
input_Signal = 2.5;
desiredState = 6.5;
%% as if you would calculate in mind
number_of_iterations = desiredState - input_Signal
number_of_iterations = 4
%% switching action
while input_Signal < desiredState
switchAction = 1; % constraint of the controller
input_Signal = input_Signal + switchAction;
numIteration = numIteration + 1; % counter
end
input_Signal
input_Signal = 6.5000
numIteration
numIteration = 4
Walter Roberson
Walter Roberson 2025-2-22
Use a "While Iterator" block; https://www.mathworks.com/help/simulink/slref/whileiterator.html
Initialize the input signal. "While" the current signal is less than the desired state, add the increment to the signal and increment a counter. When the condition becomes false, read out the counter.

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