WO2018023363A1 - Fault simulation system - Google Patents

Abstract

A fault simulation system mainly consists of a bus control circuit, an FPGA digital system, a single-chip microcomputer controller, a program control conditioning circuit, an interface adapter circuit, a serial port communication module, a power supply system, and various types of equipment cables. The FPGA digital system comprises a general fault control module, which mainly consists of an SOPC control system, the power supply system, the single-chip microcomputer controller, the serial port communication module, an I/O driver module, a debug button, an LED indicator module, and a socket etc. The SOPC control system mainly consists of an FPGA digital chip 1C6PQ240C8, a serial configuration chip EPCS4, a 50MHz crystal oscillator, a filter capacitor, and a related socket etc. The fault simulation system forms, by means of the multiple signal mappings and transmissions, a fault, which occurs from inside to outside and has an uncertain dimension, satisfying the requirements of the fault simulation.

Description

 Manual Name of Invention: A Fault Simulation System

 Technical field

 [0001] The present invention relates to a fault simulation system, and more particularly to a fault simulation system for implementing a link and a transfer relationship model, and belongs to the field of laser ranging. Background technique

 [0002] With the rapid development of science and technology, the detection of equipment exhibits the characteristics of comprehensive functions, advanced technology, complicated structure, high price, fast replacement, etc., and therefore puts higher requirements on the capabilities of equipment inspectors. The fault detection-based detection technology acquires the response output of the fault state under the test conditions, and designs the system to complete the automatic detection of the fault unit. It has the characteristics of high detection efficiency and accurate fault location. Equipment based on hardware-in-the-loop simulation The guarantee method uses a certain method to realize the simulation of various faults, solves the difficulties in setting the faults in the actual training, and the lack of troubleshooting opportunities for the maintenance personnel. It has the characteristics of strong sense of reality, close proximity to the installation, and low cost. Modeling is the basis of simulation. Simulation is one of the important purposes of modeling, and the two are inseparable. System modeling is a mathematical or physical method based on the analysis or observation of the actual system, ignoring the secondary factors, to obtain a model that approximates or simplifies the actual system. The established model is actually a model established according to the purpose of the research, and is an abstract description of the essential attributes of a certain aspect of the system. The simulation is to use the model to reproduce the essential process occurring in the actual system. The essence is the operation of the model, which is applied to the testing, analysis or training of the system. The system can be a real system or a real and conceptual system realized by the model.

 [0003] Fault modeling was originally a concept proposed in fault diagnosis, and is a process of establishing a fault model for various failure modes in the system. As the basis of fault diagnosis technology, fault modeling technology has been developed with the development of fault diagnosis technology, and the application object has been gradually expanded. According to the modeling method, the existing basic models mainly include quantitative models, qualitative models, causal dependence models, structural models, and multi-signal flow graph models.

[0004] System modeling and simulation technology is based on similar principles, model theory, system technology, information technology, and related professional technologies in modeling and simulation applications. Computer systems, application-related physical effects devices, and simulators are Tools, using models to study, analyze, and design actual or envisioned systems A multidisciplinary and comprehensive technology for processing, production, testing, operation, evaluation and maintenance activities.

 technical problem

 In view of the above deficiencies of the prior art, it is an object of the present invention to provide a fault simulation system.

 Problem solution

 Technical solution

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

 [0007] A fault simulation system is mainly composed of a bus control circuit, an FPGA digital system, a single chip controller, a program control conditioning circuit, an interface adaptation circuit, a serial communication module, a power supply system, and various types of equipment cables, and the FPGA digital system The utility model comprises a universal fault control module, which is mainly composed of a SOPC control system, a power supply system, a single chip controller, a serial communication module, an I/O driving module, a debugging button, an LED indicating module and a socket, wherein the SOPC control system is mainly composed of an FPGA. Digital chip 1C6PQ240C8, serial configuration chip EPCS4, 50MHz crystal oscillator, filter capacitor and related socket; the power supply system is powered by external DC 24V power supply, and the power supply voltage is converted into system through DC/DC power module and LM1117 power chip. The required ±15V, 5V, 3.3V and 1.5V; the serial communication module is mainly composed of ATmegaS MCU, MAX485 chip, 幵, crystal oscillator and related sockets; the I/O driver module is composed of driver chip 74ALVC164245 ; The button and LED indicator module are mainly Debugging buttons, DIP Jian OFF and a light emitting diode.

 [0008] Preferably, the above FPGA digital system can implement various state registration and state control, and combines design-related program-controlled peripheral conditioning circuit and control bus to realize multi-modal flexible conversion of signals.

 [0009] Preferably, the above SOPC control system can realize various types of sequence, logic and state control through corresponding VHDL programming design.

 [0010] Preferably, the power supply system has an anti-reverse protection function.

 [0011] Preferably, the serial communication module is mainly used for receiving a fault code sent by the control end of the PC, and sending the parsed fault code to the SOPC control system.

[0012] Preferably, the above I/O driving module is used to drive various types of control signals output by the SOPC system, and reduce the output impedance thereof to improve the driving capability.

 [0013] Preferably, the above button and LED indication module are used for system debugging and various status display.

Advantageous effects of the invention Beneficial effect

 [0014] The present invention starts from the structure and working principle of the stable aiming control combination, and can be found by comparing the stable aiming control combination link and the transfer relationship model with the fault model and the fault conditioning board: Under normal conditions, according to the definition in the basic model The mapping effect and the transmission process, various types of simulation signals are sequentially applied and propagated in the corresponding physical simulation circuit model to simulate the function realization of the simulation object under normal working conditions; in the fault state, according to the definition in the fault model The fault link mapping mode, the general fault control module sends various state control signals according to the fault code, thereby controlling the fault mapping effect of various fault conditioning circuit models, and the generated fault signals are sequentially propagated according to the transmission relationship, eventually leading to fault phenomena. The occurrence of the simulated fault is through multiple mapping and transmission of the signal, forming a fault with an indefinite number of dimensions occurring inside and outside, meeting the requirements of the fault simulation.

 Brief description of the drawing

 DRAWINGS

 1 is a schematic structural diagram of a fault simulation system according to the present invention;

2 is a general block diagram of a general control module of the present invention;

3 is a circuit diagram of a power supply system of the present invention;

4 is a circuit diagram of a serial communication module of the present invention;

5 is a circuit diagram of an I/O driving module of the present invention.

Embodiments of the invention

 The present invention provides a fault simulation system. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

 [0021] The fault simulation system of the present invention is mainly composed of a bus control circuit, an FPGA digital system, a single chip controller, a program control conditioning circuit, an interface adaptation circuit, a serial communication module, a power supply system, and various types of equipment cables, as shown in the figure. 1 is shown.

[0022] The core of the simulation design of the stable aiming control component is the FPGA digital system. By designing the FPGA universal fault control module, various state registration and state control can be realized, and the design related program-controlled peripheral conditioning circuit and control bus are realized. The multi-modal flexible conversion of the signal can not only complete the stable image control combination In addition to the normal simulation of the model, various fault modes can be set by fault injection, that is, the hardware-in-the-loop simulation of the fault link and the transfer relationship model is completed.

 [0023] The simulation principle of the steady-motion control combination is: After the computer simulated by the single-chip controller and the adaptation circuit issues a control signal, a mode signal, and a power-on signal, the FPGA control module generates an operation required for the stabilization control process on the one hand. The sequence control signal, on the other hand, receives the fault code sent by the serial communication module, adjusts the state of the status register (normal/fault) according to the fault code, and converts the corresponding logic, and finally issues various state control signals. The control program-controlled peripheral conditioning circuit outputs a corresponding electrical signal, and is connected to the equipment cable through the interface adaptation, so that the stable control combination generates various port signals for maintenance detection. The stable aiming control combined simulation system not only simulates the stable tracking control function of the components, but also simulates various fault states of the stable steering control combination to meet the requirements of maintenance training fault simulation.

 [0024] The control module is mainly composed of a SOPC control system, a power supply system, a single chip controller, a serial communication module, an I/O driving module, a debugging button, an LED indicating module, and a socket, and the block diagram thereof is shown in FIG. 2 .

 [0025] The system uses an external DC 24V power supply to supply power uniformly, and converts the power supply voltage to ±15V, 5V, 3.3V and 1.5V required by the system through the DC/DC power supply module and the LM1117 power supply chip. The power supply system has anti-reverse protection. Function, its circuit structure is shown in Figure 3.

 [0026] The SOPC control system is mainly composed of an FPGA digital chip 1C6PQ240C8, a serial configuration chip EPCS4, a 50 MHz crystal oscillator, a filter capacitor, and related sockets. The SOPC control system, through the corresponding VHDL programming design, can realize various types of sequencing, logic and state control, which is the core part of the general control module.

[0027] The serial communication module is mainly composed of ATmega8 single chip microcomputer, MAX485 chip, Shaoguan, crystal oscillator and related sockets, and its circuit structure is shown in FIG. It is mainly used to receive the fault code sent by the PC control terminal, and send the parsed fault code to the SOPC control system.

[0028] The I/O driving module is composed of a driving chip 74ALVC164245, and its circuit structure is as shown in FIG. 5. It is used to drive various types of control signals output from the SOPC system, reducing its output impedance to improve drive capability.

[0029] The button and the LED indicating module are mainly composed of a debugging button, a dialing switch and an LED, and are used for system debugging and various status displays.

[0030] The fault simulation system provided by the present invention compares the control link and the transfer relationship model by The obstacle model and the fault conditioning board can be found: In the normal state, according to the mapping effect and the transfer process defined in the basic model, various types of simulation signals are sequentially applied and propagated in the corresponding physical simulation circuit model to simulate the simulation. The function realization of the object under normal working conditions; in the fault state, according to the fault link mapping mode defined in the fault model, the universal fault control module sends various state control signals according to the fault code, thereby controlling various fault conditioning circuit models. The fault mapping effect, the generated fault signal propagates in turn according to the transmission relationship, and finally leads to the occurrence of the fault phenomenon. The simulated fault is the multiple mapping and transmission of the signal, forming the dimension occurring from the inside and the outside. Indefinite faults meet the requirements of fault simulation. The construction of link and transfer relationship model and fault model provides a reliable way for the design and implementation of the fixed-motion control combined maintenance training fault simulation system.

 It is to be understood that those skilled in the art can make equivalent substitutions or changes to the inventions and the inventions of the present invention, and all such changes or substitutions fall within the scope of the appended claims.

Claims

Claim A fault simulation system is characterized in that: the simulation system is mainly composed of a bus control circuit, an FPGA digital system, a single chip controller, a program control conditioning circuit, an interface adaptation circuit, a serial communication module, a power supply system, and various types of equipment cables. The FPGA digital system includes a general fault control module, which is mainly composed of a SOPC control system, a power supply system, a single chip controller, a serial communication module, an I/O driving module, a debugging button, an LED indicating module, and a socket, wherein the SOPC is The control system is mainly composed of FPGA digital chip 1C6 PQ240C8, serial configuration chip EPCS4, 50MHz crystal oscillator, filter capacitor and related sockets; the power supply system is uniformly powered by external DC 24V power supply, and passes through DC/DC power module and LM1117 power chip. The power supply voltage is converted to ±15 V, 5V, 3.3V, and 1.5V required by the system; the serial communication module is mainly composed of an ATmega8 single chip microcomputer, a M AX485 chip, a switch, a crystal oscillator, and a related socket; The O driver module is composed of a driver chip 74ALVC164245; The button and the LED indicating module are mainly composed of a debugging button, a dialing switch and a light emitting diode; the FPGA digital system can realize various state registration and state control, and realizes the signal by combining design-related program-controlled peripheral conditioning circuit and control bus. Multi-modal flexible conversion; The SOPC control system, through the corresponding VHDL programming design, can realize various types of sequencing, logic and state control. The fault simulation system according to claim 1, wherein: said power supply system has an anti-reverse protection function. The fault simulation system according to claim 1, wherein: the serial communication module is mainly configured to receive a fault code sent by the control end of the PC, and send the parsed fault code to the SOPC control system. The fault simulation system according to claim 1, wherein: said I/O driving module is configured to drive various types of control signals output by the SOPC system to reduce the output impedance thereof to improve driving capability. The fault simulation system according to claim 1, wherein: said button and said LED indicating module are used for system debugging and various status displays.