Application of Kalman Estimation Techniques with Fuzzy Logic to a Synchro Digitizer


In the quest for digitizing the synchro, this paper proposes a method for processingthe synchro format voltages to extract a single reliable shaft angle reading. Thiseliminates sophisticated and expensive electronic parts and replaces them bysoftware algorithms. Kalman estimation techniques are applied to improve sensordynamic response, precision and efficiency. Fuzzy logic techniques are used to speedup the estimation process so that the time taken to produce a result is within the timeof half a cycle of the excitation frequency (less than 1.25 ms). Wavelet techniquesare also used to improve the accuracy much further. The synchro digitizer wassimulated using Matlab, and the random noise was taken into effect. Theoreticalanalysis and experimental data ascertained the above technique.