RT1003 Manual
Revision:
190628
47
Advanced slip
Figure 23.
NAVconfig Advanced Slip page
The Advanced Slip feature uses characteristics of land vehicle motion to improve heading
and reduce drift. Specifying the position of the non-steered wheels makes a huge difference to
the lateral drift performance of the RT1003 when GNSS is not available. The vertical drift
performance can also be improved by specifying some additional measurements.
This feature must be disabled for airborne and marine applications where the lateral velocity
can be significant. It is also not suitable for land vehicles that have no non-steered wheels.
The vertical settings should not be used if the vehicle can perform wheelies (motorcycles).
The advanced slip feature applies heading correction when the vehicle is not slipping; when
the vehicle is slipping the lateral acceleration is usually large enough that the normal heading
corrections provide excellent results. When combined with a wheel speed input the drift of
the RT1003 during GNSS blackout is drastically reduced.
For the Lateral settings, the system needs to know the position of the non-steered axle (the
rear wheels on a front-wheel steering vehicle and vice versa). Vehicles with all wheels
steering cannot use this feature reliably, although minor steering of the rear-wheels does not