Any sensor offset drift error
will be the same for both measurements, since the sensor is the same for both measurements.
So, the drift error
indicates the accuracy of attitude algorithm.
Furthermore, noises, drift error
, sensor axis misalignment error must be taken into account.
The first one is the current sensor drift error
and the other is the high current signal interference.
Comparing with the classical method, the proposed temperature method could reduce the temperature drift error
typically from 0.01 g (at least 0.005 g) to 0.001 g (g is the unit of the normalized sensor output obtained by (8)), which demonstrates that our method is more stable and less sensitive to high temperature environment.
Algorithm of the drift error
correction module can by described in the following steps:
Positioning accuracy of INS decreased as the drift error
Since in motion compensated temporal filtering (MCTF) a frame is reconstructed from its reference frame(s), the reduced quality after reconstruction can accumulate to drift error
. To reduce the impact of reconstruction with missing descriptions, we include a downsampled block as a common base layer in all descriptions.
Allan variance is a method of representing root mean square (rms) random drift error
as a function of average time (IEEE ...
Zero Drift Error
= [+ or -]Sensor Zero Drift (W)/Signal Power (W) x 100 %
The heading angle is determined, based on the sensor yaw angle, and its drift error
is compensated by means of the sensor fusion with the RTK-GPS.
The inertial navigation system has a superior short term performance, but there is a long time drift error
. The GNSS has good long-term accuracy but suffers from short term noise or even outage.