3 Parameterization of HEINZMANN Speed Governors
Programmer PG 02
13
3.7
Parameterization of Maps
Parameterization of maps will always follow the same procedure. The number of base
points, however, will be different for different functions. A supporting point consists of
one x-value and one y-value and the associated z-value. Intermediary values between
adjacent pairs of variates will be interpolated by the control.
When parameterizing a map, the following instructions must be observed:
The x- and y-values must always begin with index 0.
The x- and y-values must be arranged by ascending order.
Each x- and y-value may occur only once.
For unused base points at the end of the map, the x- and y-variates must each be
assigned their respective smallest possible values.
Parameterization of any map does not require all pairs of variates to be assigned a value. It
will suffice to assign values only to as many parameters (beginning with index 0 for the x-
and y-values) as will be needed. Similarly, it will not be necessary that the distances
between the base points be the same.
As an illustration of how parameter indexes are assigned to a map, the following example
shows a map table with a domain of 5 times 5 base points:
x-values
y-values
x index 0
x index 1
x index 2
x index 3
x index 4
y index 0
z index 0
z index 1
z index 2
z index 3
z index 4
y index 1
z index 5
z index 6
z index 7
z index 8
z index 9
y index 2
z index 10
z index 11
z index 12
z index 13
z index 14
y index 3
z index 15
z index 16
z index 17
z index 18
z index 19
y index 4
z index 20
z index 21
z index 22
z index 23
z index 24
If the current values in direction of the x- and/or y-axes are outside the domain of the map
as defined by the base points, the respective border value of the map will be used instead.
If it should prove necessary to restrict dependence to only one direction this can be
achieved by setting the base points for the other direction to their minimum value. In other
words, if there is functional dependence only in direction of the y-axis, all x index values
are to be set to minimum value. The base points for z will then be those of the series with
x-index 0.
HEINZMANN recommend to use DcDesk 2000
for parameterizing maps and
characteristics as this programme will takes care of all particulars to be paid attention to
and will simplify parameterization considerably. Thus, the above table is included in
