An improved rotation scheme for Tri-axis rotational inertial navigation system

摘要: Rotating modulation technique is a mature method which has been widely used in the rotational inertial navigation system (RINS). A proper rotation scheme can greatly improve position accuracy of system. However, if angular motion, performance will be affected and improvements should made. The mechanism conventional based on tri-axis RINS static base, called Scheme this paper, analyzed firstly. Then bad effects system’s yaw motion upon are discussed an improvement aiming at dynamic base put forward after that. Simulations Matlab conducted to demonstrate effectiveness improvement. Vehicle experiments real that made reduce maximum radical direction errors by 0.6 n miles 12 h roughly compared original unimproved scheme.