A Voltage Fault Injector with Adjustable Gain

Abstract

The invention belongs to the field of test technologies, and relates to a voltage fault injector with variable gain. The device is composed of an injector and an upper computer; when in actual work, the device needs to be connected to a sample to be tested to achieve fault injection into the sample to be tested. The upper computer sends a control command to the injector, the injector based on a gain control loop executes the control command, performs gain adjustment on the original signal amplitude in the sample to be tested, and uses the signal output after adjustment as the fault signal, and therefore the fault injection is achieved. The device can perform gain adjustment on amplitudes of intermediate-frequency and low-frequency analog and digital signals, under the premise of not changing the original phases and frequencies, so that the fault injection precision and range of the related fault modes of the intermediate-frequency and low-frequency analog and digital signals can be greatly extended. Meanwhile, the device can achieve a continuous, spaced and stepping fault injection mode, increases controllability of the fault injection mode, and is convenient to operate and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of testing and relates to a voltage fault injector with adjustable gain. Background technique [0002] Testability is an important design feature for equipment to facilitate testing and diagnosis. It has become an independent subject as important as reliability and maintainability. Carrying out research on testability design technology has important academic value and engineering guidance significance. In order to measure and evaluate the testability design level of the equipment more accurately without damaging the equipment, the fault injection technology came into being in the early 1970s, and has developed rapidly in decades, and has become a product testing and system testing technology. An important technical means of verification. The fault injection technology artificially injects faults into the sample to realize the fault simulation of the sample, so that enough fault data can be obtained in a sho...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design and provide a gain-adjustable voltage fault injector aiming at the above-mentioned existing technical conditions, and its purpose is to solve the problem of low fault injection accuracy and incomplete fault mode coverage of current medium and low frequency analog and digital signals , The problem of poor controllability of fault injection

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