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A Fault Injection Method

A fault injection and fault technology, which is applied in the direction of instruments, simulators, control/regulation systems, etc., can solve problems such as low time accuracy, fault injection, and system intrusion under test, and achieve broad market prospects, improve reliability, and quickly The effect of the change

Active Publication Date: 2017-10-24
AVIC NO 631 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its own reasons, it has some shortcomings, such as only injecting faults into the places where the software can reach, easy to cause intrusion to the system under test, and low time accuracy

Method used

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  • A Fault Injection Method
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Experimental program
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Embodiment Construction

[0028] The content and effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] The design method step of the present invention is as follows:

[0030] Step 1, establishment of fault tree. The auxiliary power system has six types of faults, including APU fault, bleed air fault, intake and exhaust device fault, TPM fault, gearbox fault, and communication fault. The established fault tree of the auxiliary power system is as follows: figure 2 shown.

[0031] Step 2, establishment of fault simulation model. Each fault branch on the fault tree has a variety of triggering conditions. According to the triggering conditions of each fault, the Simulink model of the fault is established. In order to quickly and conveniently realize the simulation of multiple fault injection, the fault is added to the normal signal flow input. The trigger point of the model, such as image 3 , 4 Partial Simulink model of APU tach fau...

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Abstract

The present invention proposes a new type of fault injection method, which designs a platform for fault injection of auxiliary power system based on dSPACE, which can arbitrarily configure the injection of a single fault or multiple faults, and can be quickly configured through Simulink modeling and ControlDesk Management and parameter adjustment have realized the multi-fault injection model of the auxiliary power system and the physical electronic controller to form a semi-physical simulation system. Through multiple fault injections, the possibility of various faults in the ground test vehicle and the on-board environment can be simulated, which can be realized in the early stage of development. Quickly discover the deficiencies of hardware and software in the system, and then take effective measures to improve the reliability of the system.

Description

technical field [0001] The invention relates to a fault injection method, which is applicable to the simulation test of the auxiliary power system, simulates most of the faults encountered in the engine test process, and discovers the deficiencies of hardware and software in the system during the early development process. Background technique [0002] Fault injection, as a test method to check the fault tolerance of the system, has been widely used in the testing field. The fault injection point is located at the interface between the application and the environment. By simulating various faults that may occur in the real environment at the fault injection point, and observing the reaction of the tested object, its tolerance to faults can be tested. Artificially generating faults and introducing them into the system accelerates the process of system faults and failures. Using the monitoring and analysis of system response information after faults are injected, the goal of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
Inventor 王伟白洁吕伟刘鑫赵振宇
Owner AVIC NO 631 RES INST
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