In this paper, the history of inertial navigation technology is introduced and advancement and present development status of the up-to-date inertial sensors are described as well as some state-of-the-art inertial measurement units and their superior specifications are presented. Meanwhile, the application fields of inertial navigation technology are explained, with emphasizing that the nautical applications and development of shipborne inertial navigation systems are expounded. In conclusion, as new inertial sensors springing up and maturing, the hybrid navigation system based on inertial navigation system would be one important orientation of navigation technology in the near future.
The influence of gravity disturbance vector can't be neglected in high-precision long-time inertial navigation system (INS). In this paper, proceeding from INS arrange equations, we establish an error model of INS with gravity disturbance vector, and discuss on the basis of a case study of single channel how gravity disturbance vector influences INS in three varying situations. The simulation result indicates that the gravity disturbance vector has a conspicuous influence on high-precision long-time INS. On the basis of the comprehensive treatise of the influence of gravity disturbance vector on high-precision long-time INS, combined with the actual situation, we put forward two methods of gravity disturbance compensation.
Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.