The Reliability Evaluation and Selective Maintenance Decision for Lattice System

The phased array radar composed by the T/R units in a two-dimensional surface is a typical lattice system.The failure criteria can be described as the failure units within a subarea exceed a threshold.The exact reliability evaluation method of such system is not easy to be obtained.Thus, we proposed a reliability lower bound evaluation method.We provide an importance-based principle to identify the weakest area to conduct a selective maintenance.Some numerical examples are provided to show how to use the proposed method.