Simulation of Navigation Performance Analysis of SINS/BDS Based on ARS Aidance

To avoid exposure, BeiDou System (BDS) receiver should not work continually during integrating with Strapdown Inertial Navigation System (SINS). While Doppler Active Radar Seeker (ARS) could be aided SINS by beam velocity all the times and remedy the BDS’s default of lacking velocity information and continual working ability. So, SINS/BDS/ARS integration navigation filter was constructed to explore the potentials of ARS aiding SINS/BDS for cruise missile. Computer simulation shows that, with ARS abidance, the increment of SINS/BDS navigation error can be restrained when the receiver is absent and the convergence of SINS/BDS integrated velocity can be quickened when the receiver works. The abidance effect is better during horizon maneuver especially. The research means ARS velocity information not only to improve SINS/BDS navigation performance without extra equipment and cost, but also to decrease the demand of precision of inertial sensors and working time of BDS receiver.