Accelerometer signal processing system for inertial navigation system and method thereof

The invention discloses an accelerometer signal processing systemfor an inertial navigation system and a method thereof, and the system employs four one-out-of-four multiplexers to gate three of four signal processing channels for the processing of X-axis, Y-axis and Z-axis accelerometer signals. The other signal processing channel is connected with a reference signal for measuring the actual channel proportionality coefficient of the signal processing channel; the X-axis accelerometer, the Y-axis accelerometer and the Z-axis accelerometer are cyclically exchanged with a reference signal processing channel in different sampling periods by controlling the one-out-of-four multiplexer to select; three paths of accelerometer signals can be measured in real time, and the actual channel proportionality coefficient of each signal processing channel can be measured on line, so that the problem of channel proportionality coefficient change caused by factors such as temperature change and component aging in the acceler