Filtering Measurements on Inputs
(Original Document)
About us
Introduction
The system uses first order filtering. The filtering coefficient can be modified from a programming console or via the program.
Mathematical Formula
The mathematical formula used is as follows:
where:
α = efficiency of the filter,
Mesf(n) = measurement filtered at moment n,
Mesf(n-1) = measurement filtered at moment n-1,
Valg(n) = gross value at moment n.
On configuration, you can select the filtering value from a choice of 7 values.
Values for the Module TSX AMS 620
The filter values are as follows:
Effectiveness
Value to be selected
Time constant
Corresponding α
No filtering
0
0 s
0
Low filtering
1
2
170 ms
339 ms
0.750
0.875
Medium filtering
3
4
678 ms
1.35 s
0.937
0.969
High filtering
5
6
2.71 s
5.42 s
0.984
0.992