Overshoot analysis and suppression technology for damped INS

The inertial navigation system is essentially an unstable system[1][2]. There are three types of period oscillating errors, i.e. Schuler period, Earth period and Foucault period errors in the navigation information of an INS[3] [5]. The oscillating errors can diverge with time due to random noise of inertial sensors[4]. For a long-term INS the oscillating error can become unacceptably large, making the INS lose the navigation function.