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A complex symptom construction method for analog temporal logic of an expert system

An expert system and temporal logic technology, applied in the direction of knowledge expression, etc., to achieve the effect of simple identification and enhanced expression ability

Active Publication Date: 2020-08-14
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
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  • Application Information

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Problems solved by technology

[0010] The problem to be solved by the present invention is to use the semantics of temporal logic connectors in temporal logic for reference to the linear temporal logic (LTL) used in model checking technology (model checking), to abstract the dynamic attributes of the system into Implemented Complex Symptom Model

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  • A complex symptom construction method for analog temporal logic of an expert system
  • A complex symptom construction method for analog temporal logic of an expert system
  • A complex symptom construction method for analog temporal logic of an expert system

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Embodiment Construction

[0036] Linear temporal logic LTL is usually used to describe the time-related state attributes (dynamic attributes) of software and hardware systems in the functional correctness verification of software and hardware, and can describe the characteristics of state changes within a specified time interval. In order to add dynamic attributes to the expert system knowledge base, the present invention draws on the ability of LTL to describe time-related attributes in the system, and uses the abstract temporal model that can be realized by software to transform the temporal satisfaction relationship in LTL into the rules of the expert system . The software module responsible for recognizing the abstract temporal model has been configured in the aerospace model software.

[0037] Temporal connectors in temporal logic involved include:

[0038]

[0039] figure 2 The semantics of the above LTL temporal connectors are explained in detail. where s 1 ->s 2 Indicates that the stat...

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Abstract

The invention relates to a method for constructing complex symptoms of analog temporal logic of an expert system, which is applied to express dynamic characteristics of a system in a rule-based expertsystem knowledge base. According to the data symptom table, the basic symptom of the system state data is obtained by matching, each symptom represents a kind of state of the data; if the start timeis satisfied and the end time is not satisfied, whether the judgment condition of the complex symptom is satisfied is judged, and if so, the complex symptom is outputted to the expert system inferenceengine. Aiming at the problem that the traditional expert system knowledge base is insufficient to express the dynamic characteristics of the system, the invention adds a dynamic knowledge mode to the expert system knowledge base, expands the dimension of the knowledge base, and enhances the expression ability of the expert system knowledge base to the human expert knowledge. Complex symptoms aredesigned to describe the characteristics of time-dependent system state data. The state change of system state data in a certain time interval is identified by integer, and the identification is simple.

Description

technical field [0001] The invention relates to a method for constructing complex symptoms of simulated temporal logic of an expert system, which belongs to the field of fault diagnosis expert systems. Background technique [0002] The core of the expert system is the knowledge base, which determines what kind of "intelligence" the expert system has and what kind of problems it can solve instead of humans. In the rule-based expert system, the more commonly used mode is the relational mode, that is, each mode consists of a relation name (relation name), followed by any number of slots (slots) and their related constraints. Rules are composed using patterns and logical operators. Patterns are defined according to the needs of different domains, and each pattern consists of one or more constraints. The expert system inference engine judges whether to trigger the rule according to the match between the pattern of the rule and the input facts. [0003] The knowledge base of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06N5/02
CPCG06N5/025
Inventor 丁万兵崔小磊崔宇李娜王冲邱枫仲宇张磊何波李辉高飞曹芳芳董西国吕京伟李兰兰刘鹏
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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