Error compensation techniques for a linear inductosyn displacementmeasurement system

摘要

For increased accuracy of an inductosyn displacement measurementsystem, error compensation techniques using tabling and linearinterpolation methods have been developed. The system consists of aninductosyn position transducer, an analog driving module, a digitalcontrol module configured around a microprocessor, and a display unit.The algorithm implemented was able to on-line compensate for thesystematic error of the displacement measured. Experiments have shownthat within a test range of 875 mm, the maximum total measurement errorcould be reduced from ±5.4 μm to less than ±1.0 μm