The sub-step identification of inertial platform drift error coefficients based on sensitivity analysis

The parameter identification technique of inertial platform under the static multi-position test scheme is studied in this paper. We performed a sensitivity analysis for the nonlinear platform drift model, and pointed out the limitation of the parameter identification under the static test scheme and the selection principle of positions for the parameter identification. To solve the problem that the rate of convergence is too slow and even some parameters are divergence, sub-step identification, a new method was introduced. And the result of a simulation carried out in paper shows that the proposed method can constrain the divergence in identification effectively.