KVH Industries 1775 IMU User Manual

56-0298 Rev. B
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Page 28 of 77
8 Command Descriptions
8.1 =axes
8.1.1 Description
This command sets the alignment axes relative to the physical orientation of the measurement
axes. This allows the unit to measure motion in three arbitrarily orthogonal axes instead of
being locked into the physical orientation axes. This command only applies to the gyros and
accelerometers, not the magnetometers. In addition, this does not affect the axis reference for
the BIT status. The new matrix values are stored persistently until the defaults are restored.
Any 3x3 matrix will be accepted; the user is responsible for ensuring that the matrix is a valid
rotation matrix.
8.1.2 Usage
=AXES,[X
0
],[X
1
],[X
2
],[Y
0
],[Y
1
],[Y
2
],[Z
0
],[Z
1
],[Z
2
]
[X
0-0
],[Y
0-1
],[Z
0-2
] are floating-point values and define a 3x3 rotation matrix.
The matrix is applied as follows:































User
User
User
Sensor
Sensor
Sensor
Z
Y
X
Z
Y
X
ZZZ
YYY
XXX
210
210
210
Where X
Sensor
, Y
Sensor,
and Z
Sensor
are the sensing axes, X
The user
, Y
The user
, Z
The user
are the user-
defined output axes. The default matrix is:
1 0 0
0 1 0
0 0 1

KVH Industries 1775 IMU Specifications

General

Brand	KVH Industries
Model	1775 IMU
Category	Measuring Instruments
Language	English