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박용곤종(Yong-gonjong Park),강철우(Chulwoo Kang),이달호(Dal Ho Lee),박찬국(Chan Gook Park) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.5
This paper presents a novel aided navigation method for AUV (Autonomous Underwater Vehicles). The navigation system for AUV includes several sensors such as IMU (Inertial Measurement Unit), DVL (Doppler Velocity Log) and depth sensor. In general, the 13<SUP>th</SUP> order INS error model, which includes depth error, velocity error, attitude error, and the accelerometer and gyroscope biases as state variables is used with measurements from DVL and depth sensors. However, the model may degrade the estimation performance of the heading state. Therefore, the 11<SUP>th</SUP> INS error model is proposed. Its validity is verified by using a degree of observability and analyzing steady state error. The performance of the proposed model is shown by the computer simulation. The results show that the performance of the reduced 11<SUP>th</SUP> order error model is better than that of the conventional 13<SUP>th</SUP> order error model.