In the quest for digitizing the synchro, this paper proposes a method for processing
the synchro format voltages to extract a single reliable shaft angle reading. This
eliminates sophisticated and expensive electronic parts and replaces them by
software algorithms. Kalman estimation techniques are applied to improve sensor
dynamic response, precision and efficiency. Fuzzy logic techniques are used to speed
up the estimation process so that the time taken to produce a result is within the time
of half a cycle of the excitation frequency (less than 1.25 ms). Wavelet techniques
are also used to improve the accuracy much further. The synchro digitizer was
simulated using Matlab, and the random noise was taken into effect. Theoretical
analysis and experimental data ascertained the above technique.