1 Microelectronics , VlSI & Technology Display 8 - 10

Electronic equipment used in Army, have generally been developed on a hierarchical or modular structure. Repair and maintenance of these equipment also follow a well defined hierarchy. Though number of fault diagnosis techniques are in use in army, there is a need for having a fault diagnosis technique that could be used at any hierai'chy of maintenance. Keeping this requirement in mind, "Analog Circuit Fault diagnosis by Selective Decomposition using DC Fault Dictionary method" has been developed. This method would give a working solution which could be easily implemented for repair and maintenance of electronic equipment at different hierarchies with little modifications. The concept of Field Replaceable Unit(FRU) has been used to narrow down a fault to the lowest replaceable sub unit of a system. Further, this approach can be used both for linear and nonlinear circuits. Due to decomposition and identification of faulty subnetwork prior to application of fault dictionary method, faults have been adequately isolated. The on-line computation time will also be greatly reduced in comparison to a standard fault dictionary method as the data that would be processed has also been greatly reduced(i.e. the data pertaining to the faulty subnetwork is only processed). The effectiveness of this method in fault identification has been studied using two examples and the result has been found to be encouraging. For more details click here Back