Compared with conventional air data sensing system

FADS-INS has greater advantages in measuring accuracy when the aircraft flights in steady-state flight condition.But due to the cross-wind

atmospheric disturbance and a greater impact on noise

the system will make the decline in accuracy in high angle-of-attack and high rate of change of angle of attack flight condition

it can’t meet the requirement.In response to this problem

the use of complementary filters to process signals of FADS and INS system separately is proposed and the FADS/INS is reused to measure the angle of attack and sideslip angle in the maneuver flight condition.Theoretical analysis and simulation results show that a high measurement precision of the angle of attack and sideslip angle can be got both in steady-state and maneuver flight condition by using this filtering technology.