| Inertial MEMS device has the advantage of low cost,small size,low power consumption,shock resistance ability,etc.The types are very suitable for building a miniature strap-down inertial navigation system of inertial sensors,with the continuous improvement of device performance,and its application fields are expanding.In view of inertial MEMS devices are broad areas of application and accuracy of the continuous upgrading,the research of MEMS inertial sensors has become very hot.This paper studies for data acquisition system and error analysis based on the laboratory research on a certain model of MEMS inertial devices,lays a foundation for further applications of the inertial MEMS device at inertial system.Analysis of the inertia MEMS device's working principle of,MEMS inertial devices composition of MEMS gyroscope devices add the MEMS accelerometer inertial components,used to measure the information of angle and the angular acceleration vector,through the coordinate transformation matrix to obtain the measured posture vector sport information.The main studied to MEMS gyroscopes and MEMS accelerometer mechanics,give the error model of gyroscope and the accelerometer then the main error analysis to impact of inertial MEMS devices.This paper through the single-chip,PC and complete portfolio of inertial MEMS devices completed data acquisition system.Designed with the communication circuit boards of AT89C52 single-chip and inertia device, designed data acquisition interface with VC++6.0in PC-application.Researching the theory of Allan variance,Application of the principle of Allan variance analysis of the five major random error to quantization noise,angle random walk,rate random walk,zero impartial stability and the rate slope in MEMS gyroscope.Accordance to the collected data with MEMS gyroscopes X-axis,Y axis and Z axis identify the pilot Allan variance,estimate the five error values of gyroscope random,give the random error corresponding to the family time.
|
PDF Full Text Request