This paper is devoted to the analysis of various types of analog-to-digital converters (ADCs) for the accelerometer channel of inertial navigation systems. The requirements for such ADCs are specified based on the operating modes of accelerometers. Different types of ADCs are considered and their inherent errors are analyzed. The most critical parameter is the change in the zero offset during cyclic action of high and low temperatures. It is shown that the use of a sigma-delta ADC with the possibility of periodically calibrating the zero offset is the most suitable for satisfaction of the formulated requirements to the ADC. The scheme and results of experimental studies of ADCs of this type are given. It is shown that the use of temperature-algorithmic correction makes it possible to reduce the change in the zero offset of the ADC by 18 times. The amplitude-frequency property (AFP) of such ADC for applications on dynamic objects is analyzed.

DOI: 10.22184/1993-7296.2018.12.7.684.694


Разработка: студия Green Art