CN104793609B - Self-adaptive optical electronic control system self-checking and fault diagnosis expert system - Google Patents

Abstract

The invention discloses an expert system for self-inspection and fault diagnosis of an adaptive optical electric control system. Based on the fault tree analysis of the electronic control system of the self-adaptive optical system, the present invention establishes a systematic self-inspection and fault diagnosis expert system, which mainly includes a man-machine interface module, a database module, a reasoning machine module, and an explanation module. On the basis of fault analysis of the electronic control system of the adaptive optics system, the system fault tree is designed and generated, the knowledge base of the fault diagnosis expert system is generated through the knowledge of the fault tree, and the fault diagnosis reasoning is carried out according to the knowledge base generated by the fault tree, and finally Realize the functions of optical system, electric control system and fault diagnosis expert system. The invention is suitable for routine maintenance and fault diagnosis of the electronic control system of the adaptive optics system.

Description

An expert system for self-inspection and fault diagnosis of adaptive optical electronic control system

technical field

The invention relates to the field of adaptive optics systems, in particular to the content of self-check and fault diagnosis of an electric control system in the field of adaptive optics systems.

Background technique

The adaptive optics system is a large and complex system. The whole system involves different fields such as optics, mechanics, electronics, and control. Among them, the electronic technology covers the acquisition-processing-correction-observation and other stages of the adaptive optics system. With the development and maturity of adaptive optics technology, adaptive optics systems are more and more used in different fields such as aerospace, medicine, astronomy, and industry. The high complexity and wide application of adaptive optics system also put forward higher requirements for the reliability of its electronic control system. At the same time, for the electronic control system of the adaptive optics system, the system modules are numerous and scattered, the application environment is complex and changeable, and the internal conditions of the system are also quite complicated. Therefore, the inspection of the operating status of the electronic control system not only wastes a lot of manpower and material resources, but also is difficult to implement from the perspective of the system. Moreover, the development of domestic adaptive optics system started relatively late, and the development of the discipline system is not very sound, and there are few domestic researches on the self-inspection and fault diagnosis of the electronic control system. Therefore, an effective and easy-to-use real-time fault diagnosis and self-checking system is urgently needed in the daily use of the system. Based on the above considerations, we analyze the fault points of the adaptive optics electronic control system, design a fault tree, provide detection methods for each fault point, and write a man-machine interface for fault detection. A set of simplified expert system for fault diagnosis of adaptive optics electronic control system is established, which has the function of fault diagnosis for the entire adaptive optics electronic control system.

Contents of the invention

The invention provides a self-inspection and fault diagnosis method design for the self-adaptive optical system electric control system. The purpose of the present invention is to realize the fault detection and diagnosis of the electronic control system of the adaptive optics system through the man-machine interface of the system, and guide the on-site personnel to carry out troubleshooting, so as to ensure the effective operation of the electronic control system.

The technical solution of the present invention is based on the fault tree analysis of the electronic control system of the adaptive optics system, and establishes a systematic self-inspection and fault diagnosis expert system, which mainly includes a man-machine interface module, a database module, an inference module, and an explanation module. The man-machine interface module is mainly connected with the database module, the explanation module and the reasoning module.

Further, the database module is mainly connected with the inference engine module, the man-machine interface module and the explanation module. The database module mainly includes (1) system preset database, pre-compiled and stored expert knowledge of fault identification and processing of optical system electronic control system; (2) management analysis module, records and stores system fault logs, system fault maintenance records, and updates the preset database Troubleshooting method.

Further, the main functions of the inference engine module include (1) pre-editing and setting the diagnostic logic flow, which is provided to the self-inspection and fault diagnosis expert system when the system fails; (2) adopting rule-based self-inspection and Fault diagnosis expert system: the general form is: if<premise>then<conclusion>.

Furthermore, the fault tree analysis can show in detail various factors that may cause system failures, judge weak links in system design, and guide system self-inspection and fault diagnosis expert system design.

Further, the expert system design and diagnosis steps of the self-inspection and fault diagnosis of the adaptive optical system electronic control system are as follows: (1) analyze the system fault, design and generate a fault tree; (2) design the system preset according to the fault tree Database; (3) The system collects the information of each hardware module of the optical system and the electronic control system in real time; (4) Calls the inference engine module to determine whether the system has a fault according to the returned information; (5) If there is a fault, compare it with the knowledge base to obtain the processing method, And record the failure information.

Description of drawings

Fig. 1 is a composition diagram of an expert system for self-inspection and fault diagnosis of the electronic control system of the adaptive optics system of the present invention.

Figure 2 is a schematic diagram of the fault tree of the electronic control system of the adaptive optics system.

3 is a schematic diagram of an expert system for self-inspection and fault diagnosis of the electronic control system of the adaptive optics system.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific implementation.

As shown in Figure 1, the self-inspection and fault diagnosis expert system design and diagnosis steps of the adaptive optics system electronic control system are as follows: analyze the system fault, design and generate a fault tree (as shown in Figure 2); design the system preset database according to the fault tree ;The system collects the information of each hardware module of the optical system and the electronic control system in real time; calls the inference engine module to judge whether there is a fault in the system according to the returned information; if there is a fault, compare it with the knowledge base, obtain the solution, and record the fault information.

Mainly input, export, and display fault information through the human-computer interaction interface. The system design preset database belongs to the database module, which contains pre-programmed and stored expert knowledge for fault identification and processing of the optical system electronic control system. The database module records and analyzes system fault logs, system fault maintenance records, and updates fault handling methods in the preset database. The inference engine module pre-edits and sets the diagnosis logic flow, which is provided to the self-inspection and fault diagnosis expert system call when the system fails; the diagnosis flow mainly obtains the fault characteristic value of the faulty module through the system command, and compares the characteristic value with the preset value of the system. The fault information database is compared to determine the fault type and fault location; the rule-based self-inspection and fault diagnosis expert system is adopted: the general form is: if<premise>then<conclusion>.

According to the system analysis results, the system fault tree is designed as shown in Figure 2. The content represented by the serial number is shown in Table 1.

Table 1

According to the fault tree schematic diagram in Figure 2, the design of the self-inspection and fault diagnosis expert system is completed, and the software block diagram of the self-inspection and fault diagnosis expert system is shown in Figure 3. According to the composition of the adaptive optics system electronic control system, considering the ease of use and rationality of the system, the content to be detected (i.e. the adaptive optics system electronic control system) is mainly divided into auxiliary modules, wavefront processing modules, The data transmission module has three parts. The auxiliary module mainly includes the power system, check whether the power system is powered on, whether the relay is working normally, whether the output voltage is normal, etc. The wavefront processing module mainly includes two parts: the wavefront processor system and the high-voltage driver system. In the wavefront processor system, we mainly detect its control terminal and data receiving terminal. It mainly checks whether the wavefront processor sends and receives commands normally, and checks whether the data and images are received normally. In the high-voltage drive system, in addition to detecting the control terminal, we also need to detect the return of multiple voltages. By sending a fixed voltage to the high-voltage drive system, we can judge whether the return voltage is normal. In the data transmission module, we mainly check whether the configuration of the network switch is correct, and whether the optical fiber switch receives and distributes multi-channel optical fiber signals correctly. The most important thing is the detection of the camera transfer system, whether the data conversion card receives the camera data normally, whether the control command sent from the data conversion card to the camera is normal, etc.

Claims (3)

1. A self-inspection and fault diagnosis expert system of an adaptive optics electronic control system, characterized in that: based on the fault tree analysis of the adaptive optics electronic control system, the self-inspection and fault diagnosis expert system of the system is established, which mainly includes human Machine interface module, database module, inference engine module, and explanation module; Described man-machine interface module is connected with database module, explanation module, inference engine module; The database module is connected with the inference engine module, the man-machine interface module and the interpretation module. The database module includes (1) the system preset database, which pre-programs and stores the expert knowledge of the fault identification and processing of the optical system, the electronic control system; (2) the management analysis module, which records and analyzes System fault logs, system fault maintenance records, update fault handling methods in the preset database; The electric control system mainly includes three parts: auxiliary module, wave front processing module and data transmission module; the auxiliary module mainly includes the power system, checks whether the power system is powered on, whether the relay is working normally, and whether the output voltage is normal; the wave front processing module mainly includes the wave There are two parts: the pre-processor system and the high-voltage driver system. The wave-front processor system detects its control end and data receiving end. It mainly detects whether the wave-front processor sends and receives commands normally, and detects the reception of data and images. Whether it is normal; In addition to detecting the control terminal, the high-voltage driver system also needs to detect the return of multiple voltages, and judge whether the returned voltage is normal by sending a fixed voltage to the high-voltage driver system; in the data transmission module, it mainly detects the network switch Whether the configuration is correct, whether the optical fiber switch receives and distributes multi-channel optical fiber signals correctly; the camera transfer system is also detected, whether the data conversion card receives the camera data is normal, and whether the control command sent from the data conversion card to the camera is normal . 2. The adaptive optical electronic control system self-inspection and fault diagnosis expert system according to claim 1, characterized in that: pre-editing and setting the diagnosis logic flow, when the system fails, it is provided to the self-inspection and fault diagnosis expert system to call . 3. According to the self-inspection and fault diagnosis expert system of one of claims 1 to 2, it is characterized in that: the system self-inspection and diagnosis steps are as follows: (1) analyze system faults, design and generate fault tree ; (2) Design the system preset database according to the fault tree; (3) The expert system collects the information of each hardware module of the optical system and the electronic control system in real time; (4) Call the inference engine module to judge whether the system has a fault according to the returned information; (5) If there is a fault, compare it with the knowledge base to obtain a solution, and record the fault information.