Setting maximum and minimum limits from cumsum function

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Barry Bambury
Barry Bambury 2020-11-30
评论： Ameer Hamza 2020-12-1
Hi,
I'm trying to create a simple model that will calculate the state of charge of a battery, the possible energy flows into/out of the battery are shown below as 'A'.
Positive values are for energy available to change the battery, negative is energy demand on the battery.
A = [1, 4, 3, 3, 1, -2, -5, 1, 2, 3, -5, -5, 1, 1, 1, 3]
If the battery is of size 7, the minimum level of charge will be 0 and the max will be 7.
So far I believe the way to calculate this is by using the cumsum function, however the result of each cumsum should not be less than 0 or more than 7.
So for the above array I would like my results to look as follows, with the afformentioned limits taken into account.
SoC = cumsum(A)
SoC =[1, 5, 7, 7, 7, 5, 0, 1, 3, 6, 1, 0, 1, 2, 3, 6]
Hopefully someone will be able to help me on this, you help is greatly appriciated.

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Ameer Hamza
Ameer Hamza 2020-11-30
for-loop might be the most efficient solution
A = [1, 4, 3, 3, 1, -2, -5, 1, 2, 3, -5, -5, 1, 1, 1, 3];
B = zeros(size(A));
B(1) = A(1);
lb = 0;
ub = 7;
for i = 2:numel(A)
B(i) = B(i-1) + A(i);
B(i) = max(min(B(i), ub), lb);
end

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