Smart Submunitions Sound Array Deployment Mechanism Design And Optimization Simulation

The BAT smart sub-munitions detect the position of target through receiving the acoustic signals. In order to reduce the volume of the structure because of its acoustic array has a vast volume when it is under an unfold situation, the acoustic array deployment mechanism need to be designed to meet the requirement that the acoustic array closed when it is in storage or loaded in the airborne dispersal, to ensure it can be expand to working position smoothly and reliably after dispersed.In the present paper, three kinds of acoustic array deployment mechanism design concept were proposed. The feasibility and the rationality of each proposal were verified and the best design was selected for the further detailed design. Four kinds of acoustic array driving solutions were also proposed. The internal link in the deployment mechanism was optimized and the connecting rod lengths as well as the best size of cross section were calculated. The mechanism was simulated by the rigid body dynamics analysis software. Subsequently, the reliability model of the acoustic array deployment mechanism was established, the reliability allocation of each unit were studied based on the genetic algorithms and the whole mechanic system reliability was calculated, the key components were optimized based on the Monte Carlo method. Finally, a detailed analysis of failure modes and effects of deployment mechanism in the initial design stage were listed, and the system fault tree was drawn. The Reliability Block Diagram (RBD) was established and the distribution parameter of each unit was estimated for simulations. The reliability of the acoustic array deployment mechanism can be unfold normally in the storage period was forecasted.Through the above methods, the paper presented the optimal size and strength of the rod, and made optimal driving scheme to ensure the acoustic array has a minimum impact on the missile body and the stable operation during the flight. The system reliability set to maximum based on the reasonable allocation of each unit, and the reliability of the key component in the structural optimization has improved. The reliability of the deployment mechanism storage life in10years was obtained by application of the digital simulation.