Guidance laws for target localization using vector field approach

Planning a path to improve the performance of target localization usually requires significant computational load, so localization cannot be implemented in real time. In this study, guidance laws using vector fields, which can be implemented in real time with suboptimum performance, are introduced for a low-cost unmanned aircraft equipped with a bearing-only sensor. The proposed guidance laws using vector fields are simple, and the Fisher information matrix and optimization tools are combined to construct the necessary vector fields. Therefore, only a little information and limited computational load are required when an unmanned aircraft is steered by the proposed guidance laws.