Filtering Research of Micro-mechanical Gyro Drift Signal Based on Local Wave Decomposition

A new method for analyzing non-stationary signal designated as local wave analysis introduced. The single was decomposed in several intrinsic mode functions with local wave decomposition. Local wave decomposition method can decompose signal into several intrinsic mode functions, and the decomposition process is adaptive. The signal of micromechanical gyro was decomposed using the local-wave decomposing method; meanwhile noise judge criterions were given to distinguish noises, and then dealt with de-noising. The simulation and experiment results proved the method was good in de-noising. It has important meaning for the improvement of gyro precision and engineering application.