Abstract: A novel complete damped algorithm with a fuzzy controller is presented in this paper.According to the control theory, the system adds different damp feedback in three loops, which uses magnetic heading degree and velocities to damp errors.Because there are limits in using level damp networks, a fuzzy controller is used to decide whether the network is used.Simulation and experimental results show that the complete damped algorithm with a fuzzy controller can damp most Schuler and Foucault oscillations, and efficiently improves precision of strap down AHRS.

Key words: strapdown attitude heading reference system (AHRS), strapdown magnetic heading sensor, damp, fuzzy controller