Dynamic Modeling and Simulation of Underwater Glider Petrel-II 200

In China, the researches on dynamic behavior of underwater glider mostly focuses on deep-sea type and horizontally rolling mechanism, but less on shallow-sea type and tail rudder steering type. This paper takes shallow-sea underwater glider Petrel-II 200 as a model to conduct dynamic modeling and motion simulation, and adds some disturbing factors such as ocean current for the purpose of providing reference for motion form of shallow-sea underwater glider. According to the relative motion relationship of each mass in the Petrel-II 200 three-dimensional model, the centroid is simplified to a multi-rigid body system composed of multiple particles, and the relationship between the centroid and the particle is constructed. Based on the theorems of momentum and momentum moment, the dynamics of Petrel-II 200 is analyzed. The gravity, driving buoyancy and hydrodynamics of the underwater glider are transformed into body coordinate system. The complete dynamic equation is deduced, and the expressions of lift-to-drag ratio and radius of rotation are defined. By choosing the physical and hydrodynamic parameters of the underwater glider, simulation experiments of typical motions, such as sawtooth and spiral motions, are carried out. The simulation results validate the accuracy and reliability of the dynamic model, and provide a good simulation platform for the following underwater glider Petrel-II 200 motion performance optimization and control algorithm design.