7
Pitch-roll measurement
2.3
An alternating magnetic field H
1
is generated parallel to pitch axis and another field H
2
at
different frequency parallel to roll axis (by means of coils A and B, fixed to housing and
perpendicular to each other).
A pickup coil C, mounted on the stabilised platform (horizontal plane) measures the vertical
components of H
1
and H
2
(fig. 2 and 3).
The induced voltage in coil C is amplified, phase sensitive demodulated and amplified again.
The pickup coil is placed in series with the output of the accelerometer.
See block diagram fig. 1.
fig. 2
Summary of Contents for Hippy 40-MkII
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