MTS SWIFT 40 Sensor - Manual (Page 32)

SWIFT 40 Sensors 32
Transducer Interface
Hardware Overview
The TI transforms eight inputs (amplified bridge signals) into three forces and
three moments by the following process:
• Applying a zero offset and scaling the signals
• Using a geometric matrix to transform the signals into three forces and three
moments in the transducer reference frame
• Using a cross-coupling matrix calculation to scale and sum the individual
signals into each output
• In spinning applications, using a rotational transformation to put the forces
and moments into a stationary reference frame
The TI conditions the transducer signals, producing seven analog output signals
proportional to the following values:
• Longitudinal force (Fx)
• Lateral force (Fy)
• Vertical force (Fz)
• Overturning moment (Mx)
• Driving/Braking moment (My)
• Steering moment (Mz)
• Angle output (
θ)
Analog signals
The force and moment signals are output from the TI in the form of ±10 V
1
full
scale analog signals. These signals can be used by any data acquisition system.
The angle output is an analog voltage that is proportional to angular position. At
0° the output is 0 V. At 360°, the output is 5 V.
Fx1
Fx2
Fy1
Fy2
Fy3
Fy4
Fz1
Fz2
Fx
Fy
Fz
Mx
My
Mz
Geometric
Matrix
Zero and
Scaling
q
Cross
Coupling
Matrix
Rotational
Transformation
q
Inputs Outputs
Transducer Interface Functions
S20-09
1. Standard from MTS. Other full-scale output voltages can be evaluated and
may be provided at special request.