Mts SWIFT 40 Sensor Manuel d'utilisateur télécharger pdf (Page 23)

Coordinate System

SWIFT 40 Sensors Hardware Overview

Coordinate System

In the transducer, independent strain gage bridges measure forces and moments

about three orthogonal axes. The signals are amplified to reduce the signal-to-

noise ratio. An encoder signal indicates angular position, which is used to

convert raw force and moment data from the rotating transducer to a vehicle-

based coordinate system. The force and moment and encoder information is 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 six forces and moments

that are measured at the spindle: Fx, Fy, Fz, Mx, My, and Mz. A seventh

(angular) output is available for tire uniformity information, angular position, or

to determine wheel speed (depending on the data acquisition configuration).

The coordinate system shown below was originally loaded into the TI settings by

MTS. It uses the right-hand rule.

Transducer

Interface

Output signals

10 Volts

Angular

Position

Bridge

Outputs

S20-06

+Mz

+Fz

+Fy

+My

+Mx

+Fx

Forces acting on outer ring

S20-07

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 169 170

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Mts SWIFT 40 Sensor Manuel d'utilisateur Page 23