System and method for dynamic testing of digital system under test

A system-under-test, dynamic testing technology, applied in the aviation field to ensure accuracy and eliminate phase delay

Active Publication Date: 2015-12-02
COMAC +1
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AI Technical Summary

Problems solved by technology

[0006] For this new type of smart actuation system, it is necessary to inject digital control signals into the digital bus, while the traditional dynamic test method injects analog signals, so the traditional dynamic test method cannot meet the needs of the dynamic test of this new actuation system, and needs to be studied A New Dynamic Testing Method

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  • System and method for dynamic testing of digital system under test
  • System and method for dynamic testing of digital system under test

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Embodiment Construction

[0022] In order to better illustrate the advantages of the system and method for dynamic testing of a digital system under test according to the present invention, first introduce other solutions.

[0023] In order to apply the traditional analog system dynamic test method to the bus-type digital system, the general digital system dynamic test method considers the use of signal conversion technology to achieve mutual conversion between analog signals and digital bus signals. The analog signal conversion digital bus signal is hereinafter referred to as A / D, and the digital bus signal conversion analog signal is hereinafter referred to as D / A.

[0024] In the general bus-type digital system dynamic test method, the signal from the signal generating device and the signal after the D / A conversion of the tested digital system feedback signal are input to the analysis device to compare and analyze the dynamic characteristics of the system. This method has major drawbacks. The added signa...

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Abstract

The invention relates to a system and a method for a digital system under test to dynamically test. The system comprises a dynamic signal analyzer, a digital system under test and a test interface device; the dynamic signal analyzer comprises a first output end, a first input end and a second input end, wherein the first output end is used for outputting a first analog signal for dynamically test; the first input end and the second input end are respectively used for receiving a second analog signal and a third analog signal which are to be analyzed; the digital system under test is used for receiving a first digital signal and outputting a second digital signal when the first digital signal is processed by the digital system under test; the test interface device is used for converting the first analog signal to the first digital signal, and respectively converting the first digital signal and the second digital signal to a second analog. signal and a third analog signal. According to the system provided by the invention, the delay inequality between the second analog signal to be tested and the third analog signal is reduced, so that the dynamic test result truly reflects the dynamic characteristic of the digital system under test.

Description

Technical field [0001] The present invention relates to test technology in the aviation field, and more specifically, to a system and method for dynamic testing of a digital system under test. Background technique [0002] The actuation system is the actuator of the fly-by-wire flight control system, and its performance directly affects the realization and performance of the entire flight control system. The dynamic test of the actuation system is to check the followability and stability of the servo actuation system through time domain response and frequency response tests, and verify whether the dynamic performance of the actuation system meets the design index. [0003] The general dynamic testing methods mostly use dynamic signal analyzers as signal injection and analysis devices, and realize dynamic performance testing through analog control actuation systems. This method relies on the test analysis function of the dynamic signal analyzer to obtain the dynamic characteristics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
Inventor 谢殿煌金学良戴烨飞崔希振徐真王小英
Owner COMAC
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