Overview of design of testability and dot based fault diagnosis strategy for complex systems
Testability design is an important cutting-edge technology to improve system reliability,safety,maintainability and supportability,which determines the failure detection and isolation rates and directly affects system maintenance(testing)cost.The testability design of the system has gone through a variety of design strategies,such as structural design,modeling design,and data driven design.Among them,data-driven based design is a rising strategic emerging strategy.They model the relationship between system tests and faults,and infer faults from test results to form diagnostic strategies.This paper firstly reviews the development process of system testability design and then focuses on the latest progress of testability scheme design including structure-based,model-based and data-driven-based schemes.After that,research status of each approach are sorted out and summarized.Then,the construction of the test diagnostic strategy is introduced,and the construction technology of the diagnostic strategy is determined according to the modeling method of the testability scheme,and the research on each type of technology is summarized.Finally,the current challenging problems and possible future research directions are discussed.
design of testabilitymodel-based designdata-driventest diagnostic strategy
NETL
NSTL
万方数据
