Simulation Analysis Of The Active State For Underwater Target Simulator

Underwater target simulator is used to simulate the pose of mines underwater in lab, so it plays vital role in the research and development of mine. The quality of the target simulator is related to the reliability and veracity of simulation test. During the simulation, the payload rotates in horizontal and vertical directions with the help of the target simulator, so the target angle of mine related to the target comes true real time and exactly. Because the target simulator works under water, which causes the particularity of its structure, so the more technical problems should be considered. The resistance of water to target simulator and the change of fluent field around target simulator makes some influence of the precision of target simulator, so it is necessary to analyze the fluent field of the target simulator at different working conditions.Based on virtual prototype technology two freedom underwater simulation model has been established in this paper. According to the client's technical requirements, this target simulator with new structure and great range of motion has been designed based on previous underwater designs of the target simulator. Dead zone has been solved which was caused by previous target simulator with four drive. The target simulator's two freedom of movement used two sets of coaxial structure. Mechatronics'Design was deeply demonstrated during designing and seal and electricity-proof problems were considered full.Then the 3D model of target simulator which has two degree-of-freedom movement was established, based on CFD (Computational Fluid Dynamics) technology, which is called computational fluid dynamics technology as a platform, the working state of two degree-of-freedom movement about target simulator was simulated using FLUENT. The data of the water pressure resistance and viscous resistance in both steady and non-steady were got from the simulation. The data were then used to improve the structure of target simulator. In order to increase the analytical accuracy and decrease the desigan cycle, the motion simulation of target simulator using underwater was improved and the optimization method was approached. As a result, the relationship among the angular velocity, the angular acceleration and the hydraulic resistance was obtained, which offers valuable theoretical basis to the structural design of the target simulator.