When the design of a system requires more electrical redundancy to achieve the necessary system reliability, multi-channel LVDTs are the sensor of choice. This is often the case for military fly-by-wire aircraft.
Multiple coil assemblies (each referred to as a channel) may be installed in one housing. The housing with the coil assemblies installed is referred to as the transformer assembly or transformer. Each channel has a separate armature assembly (the core and extension) attached to the common plate. The plate in turn is generally attached via a threaded lug to the target.
To prevent transmitting torque to the extension ends while threading the common plate to the target, the assembly can be designed with precision bearings between the threaded section and the extension rods. This bearing assembly also allows the rotation of the target without imparting a torque into the extension rods and armatures.
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