MTS SWIFT 10 MC Sensor - Manual (Page 22)

SWIFT 10 MC Sensors 22
Coordinate System
Hardware Overview
Coordinate System
In the transducer, independent strain gage bridges measure forces and moments
about three orthogonal axes. The signals are amplified to improve the signal-to-
noise ratio. An encoder signal measures angular position, which is used to
convert raw force and moment data from the rotating transducer to a vehicle-
based coordinate system. The force, moment, and encoder information are sent to
the transducer interface (TI).
The TI performs cross talk compensation and converts the rotating force and
moment data to a vehicle coordinate system. The result is three forces and
moments that are measured at the spindle: Fx, Fz, and My.
The coordinate system shown below was originally loaded into the TI settings by
MTS. It uses the right-hand rule.
Fx
Fz
My
Transducer
Interface
Output signals
±10 Volts
Angular
Position
Bridge
Outputs
S10MC-10
1R
+Fz
+Fx
S10MC-09 Forces Acting on Rim-side of Transducer
Sprocket
Side
Brake
Side
+My