Attitude Display System Based On MEMS

The attitude information refers to the angle of object rotates around its own three axes.In aviation field,the angle rotate around different axis is respectively named roll angle,pitch angle and yaw angle.It's important to get the attitude information timely and accurately.This paper first analyzes the composition of the attitude information,then studies kinds of attitude algorithms.Through compared with the merits and demerits of each attitude algorithm,according to the design's requirements finally choose the optimal algorithm.When object in motionless state or in uniform linear motion,we can use gravity accelerometer to get the angle of object's pitch and roll by measuring the component of gravitational acceleration on three axes.When object is accelerating,the object's attitude information can be caculated by integral operation of three axes gyroscope.This design uses these two kinds of sensors to complement each other,to correct each other's errors,and finally form the overall attitude display system.With the development of MEMS' fabrication and manufacture,MEMS sensors' performance and accuracy improving constantly,the scope of MEMS application is expanded.Its characteristics is strong compatibility,low energy consumption,low price,small volume.MEMS inertial sensors in attitude tracking have been widely used.Inertial measurement unit(IMU)is composed by a MEMS gyroscope and a gravity accelerometer,can accurately tracking roll and pitch attitude.The design use ADXL345 and L3G4200 to achieve object attitude information real-time display function.Through MEMS three axes gravity accelerometer and the three axes gyroscope collect object's each axis accelerated velocity and rotation angle information,through software analyses the data,calculates the accurate attitude information,finally we get real-time display.Through the test,the effect can meet requirement.