Calculating Time to Stabilisation in Vertical Force Data
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Hi all,
I am looking to calculate time to stabilisation after landing from a vertical jump.
To do this, I need to find out when the force data returns to body weight (plus/minus 5%) for 1 second. This needs to return a time value.
For a very basic example (ignoring plus/minus 5%), if I had the following values at 0.01 time increments...
1,3,10,2,4,6,6,6,6
and I was looking for the values to stabilse at 6 for 0.04s, then my time to stabilisation value here would be 0.06 (because it would recognise four lots of 6 and return me a value corresponding to the first 6).
I hope this makes sense.
Thank you
Answers (1)
Mathieu NOE
on 3 Mar 2022
hello
this would be my suggestion
clc
clearvars
y = [1,3,10,2,4,6,6,6,6];
dt = 0.01;
t = (1:length(y))*dt;
y_end = y(end);
err = abs(1-y./y_end); % abs error
ind = find(err<0.05); % find error < 5% indexes
ind_stab = ind(1);
t_stab = t(ind_stab);
y_stab = y(ind_stab);
plot(t,y,t,err,t_stab,y_stab,'dr')
legend('signal','error vs asymptotic value','stabilisation point');
1 Comment
Mathieu NOE
on 16 Mar 2022
hello
problem solved ?
on 2 Mar 2022
on 16 Mar 2022
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