摘要:
A method for modeling the response of a system to an input signal, wherein metadata describing characteristics of individual system components is combined to identify how signals received at one system component cascade through the system.
摘要:
A method and system for conflict detection during construction of complex databases, such as a data model for driving or modeling a complex system. Components of a data model may be defined in rules that specify objects of various types and containing various elements. The rules are declarative, and may be stored on a computer-readable storage medium. Rule declarations or assertions include element definitions, values or ranges of values, inclusion requirements, and severity level conditions in the event that conflicts or errors are detected. Conflict checking takes account of compliance with type definitions, as well as a user identity and a phase of construction of the data model.
摘要:
A method of developing fault codes for complex systems based on historical data that in one aspect is a software program arranged to be installed and to operate on a processor to process the historical data in order to facilitate development of the fault codes, the software program resulting in the processor performing the method including: grouping the historical data into a plurality of observations and a plurality of repairs; analyzing the plurality of repairs to determine associated observation signatures, each of the observation signatures being one or more of the observations; and assigning a fault code to each observation signature.
摘要:
A method, system, and computer program product for predicting the functional availability of a complex system is provided. Parameters of the complex system are converted from a plurality of binary values to at least one prognostic vector. At least a portion of a binary input expression is converted into an equivalent fuzzy output expression, the fuzzy output expression operable on the at least one prognostic vector.
摘要:
A method for improving fault isolation for failure modes in complex systems, and a software program embodying the method or a corresponding method together with a computer based aircraft diagnostic system using such software is described. The method includes: capturing a set of symptoms that is consistent with a failure mode of the complex system; identifying a set of repairs for the complex system that are consistent with the set of symptoms; ranking, when the set of repairs includes more than one repair, the repairs in a sequence that will minimize an average cost to repair the complex system, the sequence including a historical component and reflecting the effectiveness of available test results to resolve each the repairs; determining possible tests that are consistent with the failure mode; and ranking the possible tests according to there respective net improvement in the average cost to repair the complex system.
摘要:
An aircraft system includes an aircraft subsystem generating monitor trips related to the health of the aircraft subsystem; and an area health manager coupled to the aircraft subsystem. The area health manager includes a data receiver for receiving the monitor trips from the aircraft subsystem; a fault detector for processing inputs based on the monitor trips to identify faults; and an execution sequence queue coupled to the fault detector for storing a plurality of execution entities. Each of the plurality of execution entities is associated with a specific logic operation in the fault detector that is executed when the associated execution entity is in a first predetermined state.
摘要:
An aircraft system includes an aircraft subsystem generating monitor trips related to the health of the aircraft subsystem; and an area health manager coupled to the aircraft subsystem. The area health manager includes a data receiver for receiving the monitor trips from the aircraft subsystem; a fault detector for processing inputs based on the monitor trips to identify faults; and an execution sequence queue coupled to the fault detector for storing a plurality of execution entities. Each of the plurality of execution entities is associated with a specific logic operation in the fault detector that is executed when the associated execution entity is in a first predetermined state.
摘要:
A relational database is for relating maintenance information that differs for each of a plurality of complex systems, such as a plurality of differing aircraft, using a common database structure so as to facilitate maintenance procedures for the plurality of complex systems. The database structure comprises: a plurality of primary entities for providing a fault model description of each of the plurality of complex systems, the fault model description including, for each of the plurality of complex systems, failure modes, symptoms and data required to effect a repair; and a categorical entity corresponding to a complex system, such as an aircraft, that enables selection of the fault model description corresponding to the complex system or aircraft. The relational database is particularly suited for use in or by an aircraft maintenance and diagnostic system that assists with fault correction for a fault condition within an aircraft based on a fault model for the aircraft.
摘要:
A method of associating deferral procedures to a fault model for complex systems based on historical data, the method including the steps of: analyzing historical data for deferral information to identify deferral procedures; associating each of the deferral procedures with a corresponding one or more standard repairs; linking each of the standard repairs with a fault code; and associating each of the deferral procedures with one or more of the fault codes that were linked, respectively, with the one or more standard repairs to thereby provide a set of associations between deferral procedures and fault codes. The method may be implemented in a software program and the program may advantageously be employed in an aircraft maintenance and operations support system for automatically associating deferral procedures with an aircraft fault model based on historical data.
摘要:
A method, system, and computer program product for predicting the functional availability of a complex system is provided. Parameters of the complex system are converted from a plurality of binary values to at least one prognostic vector. At least a portion of a binary input expression is converted into an equivalent fuzzy output expression, the fuzzy output expression operable on the at least one prognostic vector.