Modeling and Simulation of Trajectory for AUV Swim-out Launch on Submarine

Using torpedo launch tube for swim-out launch is the best method for submarine to launch an autonomous undersea vehicle(AUV). This study establishes the mathematical trajectory models of the AUV swim-out launch based on the launcher with backend water replenishment. The models include a submodel of internal trajectory of launch tube and a submodel of trajectory at the tube orifice. The feasibility of the AUV swim-out launch out of tube is verified by simulation, and the results show that the speed of a submarine, the launching speed, and the positive or negative buoyancy of the AUV are the main factors influencing the AUV swim-out launch. This study may provide a reference for swim-out launch of AUV through torpedo launch tube.