Conceptual Study Of Navigation System For Hypersonic Cruise Vehicle

In paper, the scheme, model and algorithm of navigation for hypersonic cruise craft have been studied. The following shows the main contents:1 The integrated navigation system for hypersonic cruise craft is presented, from modern navigation system. The strap down inertial navigation system(SINS), damped by altimeter, is adopted in launch stage. According to position information of Satellite Position System(SPS) and error-angles of platform of Celestial Navigation System(CNS) ,the SINS is adopted in cruise, The angle of sight offered by seeker aids the SINS in terminal stage.2 The thesis include, the component, work procedure and position principle of Bei-Dou Twin-star Navigation Satellite System(TNSS), algorithm of SINS and principle of determining position and attitude for CNS. The error-state of SINS, inertial sensor, Star sensor, receiver of TNSS, have been analyzed and modeled.3 Considering position of TNSS, error-angles of platform and angle of sight of seeker, the measurement models and Kalman filters of SINS/TNSS, SINS/CNS, SINS/seeker, SINS/TNSS/CNSS, have been built. Also, the filter without error information of altitude has been designed.4 The performance of various combination schemes in cruise and terminal stages is simulated. The simulation include, only SINS, SINS/TNSS, SINS/CNS, SINS of various precision grades, fractional combination, filter without information of altitude's, SINS aided by angle of sight.The simulation show that, (1) SINS/TNSS/CNS can revise position, velocity, attitude commendably;(2) SINS/TNSS/CNS could reduce the requirement for the precision of SINS;(3) When the TNSS don't work sometimes, the system still have enough precision;(4) This system without error-state of attitude still have suitable precision ,(5) The integrated navigation system, SINS aided by angle of sight can improve terminal guidance.