Table 38: Effects Of Modifying Heave Filter Parameters - Applanix POS MV V5 Installation And Operation Manual

For example, if the heave error should be no more than 10 cm (comparable with the bathymetric
sonar resolution), and the significant heave amplitude is 0.5 metres on a given day, then the
maximum percentage error for that day is 20%.
5. A vessel that has a large displacement will usually exhibit more gradual changes of speed than
one that has a small displacement. Since the dynamics of a large vessel will not significantly
excite the transient behaviour of the filter, configure the heave filter to achieve a small percentage
steady state error at the expense of a long settling time.
Table 38 describes the variations of steady state heave error and settling time with changes in damping
ratio and bandwidth. Figure 85 through Figure 88 on pages B-14 through B-17 respectively show plots of
steady state heave error and transient behaviour for different combinations of heave filter parameters.
Damping ratio
Heave bandwidth
Copyright © Applanix Corporation, 2017
POS MV V5 Installation and Operation Guide
:
Table 38 Effects of Modifying Heave Filter Parameters
Heave Filter Tuning
Increase
Decrease
Increase
Decrease
Steady State
Settling Time
Error
Increase Decrease
Decrease Increase
Decrease Increase
Increase Decrease
Theory
of Operation
B-13