Study on Optimized Coefficients and Error of Sculling Algorithm

Abstract

Traditional sculling algorithms make use of incremental output of gyros and accelerometers to design algorithms, when they are applied to fiber-optical gyro (FOG) strap down inertial system (SINS), whose gyros output angular rate signal, we should simulate incremental signals by angular rate, which not only increases design difficulty but also reduce calculation accuracy. In view of this, an improved sculling algorithm was proposed, which made use of angular rate/specific force signal directly, and the error formula was derived in the condition of sculling input. Theoretical deduction and simulation results indicate: precision of improved algorithms are far superior to that of traditional ones.