MEMS Accelerometers for mid accuracy navigation systems

Introduction

Mid accuracy navigation systems (IMU), AHRS and control systems require gyros and accelerometers to predict the position of a moving object in free space. Accelerometers are used to perform initial leveling and to correct the gyro drift on the move.

In this whitepaper we compare the main parameters of the ±10g Colibrys accelerometers MS9010.D and RS9010.A currently under development, to support the system designers and as a guideline for optimum selection of an accelerometer. Four main parameters are compared including bias repeatability, scale factor, axis misalignment and vibration rectification error. MS9010.D has a long term bias repeatability of better than 5mg while first result on RS9010.A samples is better than 1.5mg. The scale factor repeatability of MS9010.D is 400ppm whilst the value for RS9010.A is 150ppm. In addition, the vibration rectification error of RS9010.A has a potential to be better than 100µg/g².

Download Link 1493719842-mems.pdf