Methods of Data Processing for Pendulous Accelerometers with Analog-Digital Sigma-Delta Converters

Methods of digital filtering of data at the output of the pendulous accelerometer with the analog-digital sigma-delta converter are discussed. Filtering properties of the analog-digital sigma-delta converter with the conversion of the frequency to the code by means of measuring its period and with the digital integration of data at the output are studied. Itis shownthatthe continuous integration of the signal attheinput, appliedinthattype of converters, in combination with the digital integration with a "shift" provides the best suppression of the high-frequency random error with the trapezoidal weight function of the digital filter. An optimal number of "data shifts" with the given time of measurements and an appropriate coefficient of noise suppression are determined.