Realization of parameter identification of inertial platform under linear vibration

This article studies the parameter identification for gyros on inertial platforms with buffered connection under linear vibration. Since the original drift model of inertial platform is unsuitable for parameter identification under such conditions, an average model is presented, and a comparison between the average model and the static model demonstrates the essential influence of linear vibration on parameter identification. Meanwhile, since the limitation of parameter redundancy exists in the average model, a new identification method is proposed which is based on two sets of data obtained from linear vibration tests with different vibration amplitudes. The new method not only ensures the convergence of high order gyro parameters for estimation, which is difficult under static conditions, but also overcomes the limitation of parameter redundancy of the average model.