
FASTRAK MANUAL
Rev. G
76
JUNE 2012
‘v’ – Attitude Filter Parameters
Syntax:
v[
F
],[
FLOW
],[
FHIGH
],[
FACTOR
]<>
or
v[
n
]<> Macro filter command
or
v<> to return the current filter values selected
Purpose:
This command establishes the sensitivity, boundary, and transition control
parameters for the adaptive filter that operates on the attitude outputs of the
tracking system. The user can adjust the parameters of this command to fine-tune
the overall dynamic response of the tracker.
F
a scalar value that establishes the sensitivity of the filter to
dynamic input conditions by specifying the proportion of new
input data to recent average data that is to be used in updating the
floating filter parameter/ variable.
Allowable range of values: 0 <
F
< 1
FLOW
a scalar value that specifies the maximum allowable filtering to
be applied to the outputs during periods of relatively static input
conditions. Setting this value to 1.0 disables the filter completely.
Allowable range of values: 0 <
FLOW
<
FHIGH
or 1.0 to
disable filter
FHIGH
a scalar value that specifies the minimum allowable filtering to
be applied to the outputs during periods of highly dynamic input
conditions.
Allowable range of values:
FLOW
<
FHIGH
< 1
FACTOR
a scalar value that specifies the maximum allowable transition
rate from minimum filtering (for highly dynamic input
conditions) to maximum filtering (for relatively static input
conditions) by proportionately limiting the decay to the low filter
limit whenever the input conditions effect a transition to a
narrower bandwidth.
Allowable range of values: 0 <
FACTOR
< 1
When the form of the command is v,1<> the attitude filter is disabled. This is the
system default configuration.