Inertial Sensor Signals Denoising with Wavelet Transform

In this current article, the authors have proposed a new software procedure for processing data from an inertial navigation system boarded on a moving vehicle, in order to achieve accurate navigation information on the displacement of the vehicle in terms of position, speed, acceleration and direction. They divided their research in three phases. In the first phase of their research, they implemented a real-time evaluation criterion with the intention of achieving real-time data from an accelerometer. In the second phase, they were interested in achieving a better estimation and compensation of the gyro sensor angular speed measurements. The objective of both studies was to propose a signal processing algorithm, based on Wavelet filter, along with a criterion for evaluating and updating the optimal decomposition level of Wavelet transform for achieving accurate information from inertial sensors. In the third phase of their work, they are suggesting the utility of a new complex algorithm for processing data from an inertial measurement unit.