Application of MEMS Pressure Sensor in Airspeed Measure for Small-UAV

A method of small UAVs airspeed measurement system realization based on MEMS pressure sensor and digital signal processor(DSP) was introduced.According to the actual needs of pressure sensor,the temperature compensation was used,and the least square method was applied to eliminate the nonlinear of the devices and circuits.The test shows that the error of airspeed is within the scope of 3% in the range from 13 m/s to 50 m/s.The airspeed measurement system has many merits,such as small size,light weight,low power consumption and high reliability.