Design Of MEMS Gyroscope Signal Acquisition And Processing System Based On DSP

In recnt years,the research and development of micro-inertial sensors based on MEMS technology has received wide attention.Micro silicon gyroscope is characterized by such advantages as small size,light weight,high reliability,and convienience of integration,etc..,so it has great application value and prosepects in the automobile industry,aerospace and robotics.However,at present stage,the accuracy of MEMS gyroscope is not very high.Besides improving the design and production process,enhangcing the signal acquisition and processing technology of the MEMS gyroscope is also an effective way to raise the accuracy.In order to reduce the nosie of MEMS gyroscope,to improve its nonlinear performance,and increase its accuracy,this paper presents a new design,which applies TMS320F2812 dital signal processor for signal acquisition and processing system.First,this paper modeled the drift of gyro and design Kalman filter to improve the precision of MEMS gyro,selected time series method to establish an ARMA model and simulate the application of the model before practical experiments.Based on the parameters of the ARMA model,a classic Kalman filter is established.The simulation result showed that the Kalman filter was effective.After that,the paper presents the overall hardware and software configuration of system.Hardware part introduces the main features of TMS320F2812 and makes the DSP as core chip.Morever,it analysis and designs the data acquisition and processing system of the external interface circuit.Software part divids the the mission into three parts,and gives the design courses.Whole software uses C and assemble mixed in programming and made the mission run as limited priority. After debugging,the sampling,transferring and transmitting is realized.Whole system has acertain engineering application value.