Adaptive beam-allocation method based on lobe efficacy

During the torpedo guidance procedure, homing-torpedo beam allocation and guidance operate in a fixed allocation mode. However, in the complicated acoustic-warfare environment, the true target is very likely to release many decoys. The torpedo must constantly detect and track multiple targets at the same time before the actual target is confirmed. Based on the analysis of the environment, this study suggests an efficacy-computation model on the basis of lobes and a secondary beam-disposal framework based on beam formation and beam allocation, in addition to the universal norm for lobe classification based on the maximum efficacy. Based on considering four factors simultaneously - target probability, tracking demand, identification needs and task requirements - a comprehensive self-adaptive beam-allocation method is proposed. First, the whole beam section is divided into many lobes based on all target positions, and then all the target efficacies in each lobe can be computed. The calculation methods for both the efficacy function of each factor and the overall efficacy function are also provided. The simulation results show that this method can ensure that the stable tracking of multiple targets and the goals is identified simultaneously. This method can provide a rational and effective approach to multiple-target beam allocation.