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According to a certain type of micro-machined gyroscope signal characteristics, wavelet transform de-noising method was adopted. The measured noise signal mainly concentrated in the low-frequency phase, overlapping with the gyro signal spectrum, and therefore the wavelet should have a certain degree of vanishing moments, in order to reduce the calculation… (More)
Based on temperature drift data of some micro-mechanical gyro, grey modeling research was carried out. Analyzing the essence of the traditional GM(1,1) model, and the logarithm transformation mathematic processing method was given for improving the smoothness of the primary data sequence and the approximate degree of the fitting equation. Then we built up a… (More)
According to the attitude update request of micro-inertial measurement system in some Aircraft, a new method Rodrigues parameters attitude update algorithm was put forward attitude update. And then attitude differential equations and attitude matrix were proposed based on Rodrigues parameters. Under angle velocity as the input with low-accuracy… (More)
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… (More)
According to the characteristics of applicable environment and MIMU itself, a new Kalman filter was designed. The shallow integrated mode was adopted for improving fault-tolerant and reliability, and considering the low-precision MIMU, mathematics model of integrated navigation system was reasonably simplified. An adoptive Kalman filter was designed through… (More)